Interventions for the prevention of weight gain during festive and holiday periods in children and adults: A systematic review.

Some periods during the year, such as festive and summer holiday periods, have been associated with weight gain. We aimed to assess the effect of interventions for the prevention of body weight gain during festive and holiday periods in children and adults. A systematic search was conducted in six databases and supplementary sources until January 4, 2023. We included randomized controlled trials (RCTs), cluster-RCTs, and non-RCTs. Our primary outcome measure was the change in body weight in adults or the change in BMI z-score or BMI percentile in children and adolescents. From 4216 records, 12 primary studies (from 22 reports) met the inclusion criteria-10 from the United States, one from the United Kingdom, and one from Chile. Two studies had a low risk of bias, two moderate, seven high, and one critical risk of bias. The meta-analysis in children included four of seven studies during the summer holidays (six interventions) and showed a mean difference in BMI z-score favoring the intervention group (-0.06 [95% CI -0.10, -0.01], p = 0.01, I2 = 0%, very low certainty evidence). The meta-analysis in adults included five studies during festive periods with a mean difference in weight favoring the intervention group (-0.99 kg [95% CI -2.15, 0.18], p = 0.10, I2 = 89%, very low certainty evidence). This review has highlighted potential interventions to prevent the increase in body weight during holiday periods. More work is needed to improve the quality of the evidence and to extend it to countries outside of the United States and United Kingdom and to the adolescent population.

Nutritional interventions in children with acute lymphoblastic leukemia undergoing antineoplastic treatment: a systematic review.

BACKGROUND: A compromised nutritional status jeopardizes a positive prognosis in acute lymphoblastic leukemia (ALL) patients. In low- and middle-income countries, ~ 50% of children with ALL are malnourished at diagnosis time, and undergoing antineoplastic treatment increases the risk of depleting their nutrient stores. Nutrition interventions are implemented in patients with cancer related malnutrition. We aimed to evaluate the effect of nutrition interventions in children diagnosed with ALL under treatment. METHODS: Using a predefined protocol, we searched for published or unpublished randomized controlled trials in: Cochrane CENTRAL, MEDLINE, EMBASE, LILACS, and SciELO, and conducted complementary searches. Studies where at least 50% of participants had an ALL diagnosis in children ≤ 18 years, active antineoplastic treatment, and a nutrition intervention were included. Study selection and data extraction were conducted independently by three reviewers, and assessment of the risk of bias by two reviewers. Results were synthesized in both tabular format and narratively. RESULTS: Twenty-five studies (out of 4097 records) satisfied the inclusion requirements. There was a high risk of bias in eighteen studies. Interventions analyzed were classified by compound/food (n = 14), micronutrient (n = 8), and nutritional support (n = 3). Within each group the interventions and components (dose and time) tested were heterogeneous. In relation to our primary outcomes, none of the studies reported fat-free mass as an outcome. Inflammatory and metabolic markers related to nutritional status and anthropometric measurements were reported in many studies but varied greatly across the studies. For our secondary outcomes, fat mass or total body water were not reported as an outcome in any of the studies. However, some different adverse events were reported in some studies. CONCLUSIONS: This review highlights the need to conduct high-quality randomized controlled trials for nutrition interventions in children with ALL, based on their limited number and heterogeneous outcomes. REGISTRATION OF THE REVIEW PROTOCOL: Guzmán-León AE, Lopez-Teros V, Avila-Prado J, Bracamontes-Picos L, Haby MM, Stein K. Protocol for a Systematic Review: Nutritional interventions in children with acute lymphoblastic leukemia undergoing an tineoplastic treatment. International prospective register of systematic reviews. 2021; PROSPERO CRD:42,021,266,761 ( https://www.crd.york.ac.uk/prospero/display_record.php?RecordID=266761 ).

Predicted impact of banning nonessential, energy-dense food and beverages in schools in Mexico: A microsimulation study.

BACKGROUND: Childhood obesity is a growing concern worldwide. School-based interventions have been proposed as effective means to improve nutritional knowledge and prevent obesity. In 2023, Mexico approved a reform to the General Education Law to strengthen the ban of sales and advertising of nonessential energy-dense food and beverages (NEDFBs) in schools and surroundings. We aimed to predict the expected one-year change in total caloric intake and obesity prevalence by introducing the ban of NEDFBs sales in schools, among school-aged children and adolescents (6 to 17 years old) in Mexico. METHODS AND FINDINGS: We used age-specific equations to predict baseline fat-free mass (FFM) and fat mass (FM) and then estimated total energy intake (TEI) per day. The TEI after the intervention was estimated under 4 scenarios: (1) using national data to inform the intervention effect; (2) varying law compliance; (3) using meta-analytic data to inform the intervention effect size on calories; and (4) using national data to inform the intervention effect by sex and socioeconomic status (SES). We used Hall's microsimulation model to estimate the potential impact on body weight and obesity prevalence of children and adolescents 1 year after implementing the intervention in Mexican schools. We found that children could reduce their daily energy intake by 33 kcal/day/person (uncertainty interval, UI, [25, 42] kcal/day/person), reducing on average 0.8 kg/person (UI [0.6, 1.0] kg/person) and 1.5 percentage points (pp) in obesity (UI [1.1, 1.9] pp) 1 year after implementing the law. We showed that compliance will be key to the success of this intervention: considering a 50% compliance the intervention effect could reduce 0.4 kg/person (UI [0.3, 0.5] kg/person). Our sensitivity analysis showed that the ban could reduce body weight by 1.3 kg/person (UI [0.8, 1.8] kg/person) and up to 5.4 kg/person (UI [3.4, 7.5] kg/person) in the best-case scenario. Study limitations include assuming that obesity and the contribution of NEDFBs consumed at school remain constant over time, assuming full compliance, and not considering the potential effect of banning NEDFBs in stores near schools. CONCLUSIONS: Even in the most conservative scenario, banning sales of NEDFBs in schools is expected to significantly reduce obesity, but achieving high compliance will be key to its success. WHY WAS THIS STUDY DONE?: - School-based interventions have been recognized as effective means to improve nutritional knowledge and prevent obesity-related diseases.- In December 2023, the Chamber of Representatives of Mexico approved an amendment that strengthens and updates the General Education Law (Article 75) and nutritional guidelines to ban the sales and advertising of nonessential energy-dense food and beverages (NEDFBs) in schools. WHAT DID THE RESEARCHERS DO AND FIND?: - We used age-specific equations to predict baseline fat-free mass (FFM) and fat mass (FM) and total energy intake (TEI) per day.- We used microsimulation modeling to predict body weight and obesity prevalence of children and adolescents 1 year after implementing the intervention in Mexican schools.- Our modeling study suggests that an important impact on obesity prevalence can be expected if the law is implemented and enforced as intended. WHAT DO THESE FINDINGS MEAN?: - If successful, this law could serve as an example beyond Mexico on how to achieve changes in body weight through school food regulation.- An important limitation of our main scenario is that we assumed full compliance of schools with the law, yet lower compliance will reduce its impact. We also did not consider historical trends on obesity or NEDFBs consumed in schools during our 1 year simulation, and we considered only the ban impact inside schools, excluding effects near and outside schools.

Canine Mammary Cancer: State of the Art and Future Perspectives.

Mammary cancer is the most frequently diagnosed neoplasia in women and non-spayed female dogs and is one of the leading causes of death in both species. Canines develop spontaneous mammary tumors that share a significant number of biological, clinical, pathological and molecular characteristics with human breast cancers. This review provides a detailed description of the histological, molecular and clinical aspects of mammary cancer in canines; it discusses risk factors and currently available diagnostic and treatment options, as well as remaining challenges and unanswered questions. The incidence of mammary tumors is highly variable and is impacted by biological, pathological, cultural and socioeconomic factors, including hormonal status, breed, advanced age, obesity and diet. Diagnosis is mainly based on histopathology, although several efforts have been made to establish a molecular classification of canine mammary tumors to widen the spectrum of treatment options, which today rely heavily on surgical removal of tumors. Lastly, standardization of clinical study protocols, development of canine-specific biological tools, establishment of adequate dog-specific disease biomarkers and identification of targets for the development of new therapies that could improve survival and have less adverse effects than chemotherapy are among the remaining challenges.

Poor compliance with school food environment guidelines in elementary schools in Northwest Mexico: A cross-sectional study.

BACKGROUND: In Mexico, 35.5% of school-age children were overweight or obese in 2018. The school food environment is important because children spend a significant part of their time at school and consume one-third to one-half of their daily meals there. In 2014, a Federal Government guideline for the sale and distribution of food and beverages in Mexican schools was published (the AGREEMENT) but the extent of its implementation is not known. METHODS: Descriptive cross-sectional study in a representative, random sample of elementary schools, using the tools of the INFORMAS network. Data collection included: a) an interview with a school authority; b) a checklist of items available in the school canteen; c) a checklist of the school breakfast menu; and d) an evaluation of the physical environment. The main indicators were: percentage of implementation (self-report) of the AGREEMENT and percentage of compliance (researcher verified) with the AGREEMENT (based on tools b and c). RESULTS: 119 schools participated (response rate 87.5%), with 15.1% (95%CI 9.2-22.8) of the schools reporting having fully implemented the AGREEMENT. However, only 1% (95%CI 0-5.3) of the school canteens and 71.4% (95%CI 57.8-82.7) of the school breakfast menus fully complied with the AGREEMENT. A variety of sugar-sweetened beverages and energy-dense, nutrient poor products were found in the school canteens. Further, only 43.7% of the water fountains in schools were functional and 23.4% were clean. In only 24.4% of schools had the school authorities received formal training related to the AGREEMENT and in 28.6% of schools had the parents received information about the AGREEMENT. CONCLUSION: The AGREEMENT has been poorly implemented in elementary schools in Mexico. Actions are needed to encourage and support its full implementation to improve the food environment in Mexican schools.

Preliminary Results of the Planet Nutrition Program on Obesity Parameters in Mexican Schoolchildren: Pilot Single-School Randomized Controlled Trial.

School-based obesity prevention programs are key to promoting healthy habits. The aim of this study was to evaluate the effect of the Planet Nutrition program on BMI z-score and other parameters compared to a control group of Mexican schoolchildren after 9 weeks of intervention. The effect of the summer holidays on the BMI z-score was also evaluated at 23 weeks. A pilot randomized controlled trial design was used and 41 schoolchildren were randomized (21 intervention group and 20 control). The program included 18 nutrition education sessions, 20 physical activity classes and six brochures for parents. At 9 weeks, no significant differences were found between the intervention and control groups in the change in BMI z-score (-0.11, 95% CI -0.23, 0.01). Significant differences were observed in some secondary outcomes: body fat percentage (-1.72, 95% CI -3.42, -0.02), waist circumference (-3.45, 95% CI -5.55, -1.36), physical activity (0.44, 95% CI 0.01, 0.88) and nutrition knowledge (1.15, 95% CI 0.27, 2.03). Summer holidays negatively affected the BMI z-score in both groups, reducing the difference observed between groups at 9 weeks (-0.07, 95% CI -0.22, 0.07). The Planet Nutrition program showed favorable effects in some obesity and lifestyle parameters in the short term.

Knowledge translation strategies for dissemination with a focus on healthcare recipients: an overview of systematic reviews.

BACKGROUND: While there is an ample literature on the evaluation of knowledge translation interventions aimed at healthcare providers, managers, and policy-makers, there has been less focus on patients and their informal caregivers. Further, no overview of the literature on dissemination strategies aimed at healthcare users and their caregivers has been conducted. The overview has two specific research questions: (1) to determine the most effective strategies that have been used to disseminate knowledge to healthcare recipients, and (2) to determine the barriers (and facilitators) to dissemination of knowledge to this group. METHODS: This overview used systematic review methods and was conducted according to a pre-defined protocol. A comprehensive search of ten databases and five websites was conducted. Both published and unpublished reviews in English, Spanish, or Portuguese were included. A methodological quality assessment was conducted; low-quality reviews were excluded. A narrative synthesis was undertaken, informed by a matrix of strategy by outcome measure. The Health System Evidence taxonomy for "consumer targeted strategies" was used to separate strategies into one of six categories. RESULTS: We identified 44 systematic reviews that describe the effective strategies to disseminate health knowledge to the public, patients, and caregivers. Some of these reviews also describe the most important barriers to the uptake of these effective strategies. When analyzing those strategies with the greatest potential to achieve behavioral changes, the majority of strategies with sufficient evidence of effectiveness were combined, frequent, and/or intense over time. Further, strategies focused on the patient, with tailored interventions, and those that seek to acquire skills and competencies were more effective in achieving these changes. In relation to barriers and facilitators, while the lack of health literacy or e-literacy could increase inequities, the benefits of social media were also emphasized, for example by widening access to health information for ethnic minorities and lower socioeconomic groups. CONCLUSIONS: Those interventions that have been shown to be effective in improving knowledge uptake or health behaviors should be implemented in practice, programs, and policies-if not already implemented. When implementing strategies, decision-makers should consider the barriers and facilitators identified by this overview to ensure maximum effectiveness. PROTOCOL REGISTRATION: PROSPERO: CRD42018093245.

Systematic review of the effectiveness of selected drugs for preventive chemotherapy for Taenia solium taeniasis.

BACKGROUND: Preventive chemotherapy is a useful tool for the control of Taenia solium taeniasis and cysticercosis. The aim of this systematic review is to assess the scientific evidence concerning the effectiveness and safety of different drugs in preventive chemotherapy for T. solium taeniasis in endemic populations. METHODS: A systematic review was conducted of controlled and uncontrolled studies, assessing the efficacy and adverse effects (among other outcomes) of albendazole, niclosamide and/or praziquantel for preventive chemotherapy of T. solium taeniasis. A comprehensive search was conducted for published and unpublished studies. Two reviewers screened articles, completed the data extraction and assessment of risk of bias. A meta-analysis of cure rate and relative reduction in prevalence was performed. The protocol for this review was registered on the International prospective register of systematic reviews (PROSPERO), number CRD42018112533. RESULTS: We identified 3555 records, of which we included 20 primary studies reported across 33 articles. Meta-analyses of drug and dose showed that a single dose of praziquantel 10mg/kg, albendazole 400mg per day for three consecutive days, or niclosamide 2g, resulted in better cure rates for T. solium taeniasis (99.5%, 96.4% and 84.3%, respectively) than praziquantel 5mg/kg or single dose albendazole 400mg (89.0% and 52.0%, respectively). These findings have a low certainty of evidence due to high risk of bias in individual studies and heterogeneity in combined estimates. In relation to side-effects, most studies reported either no or only mild and transient side-effects within the first three days following drug administration for all drugs and doses. CONCLUSION: Evidence indicated that praziquantel 10mg/kg, niclosamide 2g, and triple dose albendazole 400mg were effective as taenicides and could be considered for use in mass drug administration programs for the control of T. solium taeniasis. Evidence was not found that any of these drugs caused severe side effects at the indicated doses, although the extent of the available evidence was limited.

Knowledge translation strategies for dissemination with a focus on healthcare recipients: an overview of systematic reviews

Contexto: Embora haja uma ampla literatura sobre a avaliação de intervenções de tradução de conhecimento voltadas para profissionais de saúde, gestores e formuladores de políticas, tem havido menos foco nos pacientes e seus cuidadores informais. Além disso, nenhuma visão geral da literatura sobre estratégias de divulgação direcionadas aos usuários de saúde e seus cuidadores foi realizada. A visão geral tem duas questões específicas de pesquisa: (1) para determinar as estratégias mais eficazes que foram usadas para disseminar o conhecimento aos destinatários da saúde, e (2) para determinar as barreiras (e facilitadores) para a disseminação do conhecimento para este grupo. Métodos: Esta visão geral utilizou métodos de revisão sistemática e foi conduzida de acordo com um protocolo pré-definido. Uma pesquisa abrangente de dez bancos de dados e cinco sites foi realizada. Foram incluídas revisões publicadas e não publicadas em inglês, espanhol ou português. Foi realizada uma avaliação da qualidade metodológica; comentários de baixa qualidade foram excluídos. Foi realizada uma síntese narrativa, informada por uma matriz de estratégia por medida de resultado. A taxonomia de evidências do sistema de saúde para "estratégias direcionadas ao consumidor" foi usada para separar as estratégias em uma das seis categorias. Resultados: Identificamos 44 revisões sistemáticas que descrevem as estratégias eficazes para disseminar o conhecimento em saúde para o público, pacientes e cuidadores. Algumas dessas análises também descrevem as barreiras mais importantes para a adoção dessas estratégias eficazes. Ao analisar as estratégias com maior potencial para alcançar mudanças comportamentais, a maioria das estratégias com evidências suficientes de eficácia foram combinadas, frequentes e / ou intensas ao longo do tempo. Além disso, as estratégias voltadas para o paciente, com intervenções sob medida, e aquelas que buscam adquirir habilidades e competências foram mais eficazes para alcançar essas mudanças. Em relação às barreiras e facilitadores, embora a falta de alfabetização em saúde ou e-alfabetização possa aumentar as iniquidades, os benefícios das mídias sociais também foram enfatizados, Conclusões: Aquelas intervenções que se mostraram eficazes na melhoria da absorção de conhecimento ou comportamentos de saúde devem ser implementadas na prática, programas e políticas, se ainda não implementadas. Ao implementar estratégias, os tomadores de decisão devem considerar as barreiras e facilitadores identificados por esta visão geral para garantir a eficácia máxima.

Background: While there is an ample literature on the evaluation of knowledge translation interventions aimed at healthcare providers, managers, and policy-makers, there has been less focus on patients and their informal caregivers. Further, no overview of the literature on dissemination strategies aimed at healthcare users and their caregivers has been conducted. The overview has two specific research questions: (1) to determine the most effective strategies that have been used to disseminate knowledge to healthcare recipients, and (2) to determine the barriers (and facilitators) to dissemination of knowledge to this group. Methods: This overview used systematic review methods and was conducted according to a pre-defined protocol. A comprehensive search of ten databases and five websites was conducted. Both published and unpublished reviews in English, Spanish, or Portuguese were included. A methodological quality assessment was conducted; low-quality reviews were excluded. A narrative synthesis was undertaken, informed by a matrix of strategy by outcome measure. The Health System Evidence taxonomy for "consumer targeted strategies" was used to separate strategies into one of six categories. Results: We identified 44 systematic reviews that describe the effective strategies to disseminate health knowledge to the public, patients, and caregivers. Some of these reviews also describe the most important barriers to the uptake of these effective strategies. When analyzing those strategies with the greatest potential to achieve behavioral changes, the majority of strategies with sufficient evidence of effectiveness were combined, frequent, and/or intense over time. Further, strategies focused on the patient, with tailored interventions, and those that seek to acquire skills and competencies were more effective in achieving these changes. In relation to barriers and facilitators, while the lack of health literacy or e-literacy could increase inequities, the benefits of social media were also emphasized, for example by widening access to health information for ethnic minorities and lower socioeconomic groups. Conclusions: Those interventions that have been shown to be effective in improving knowledge uptake or health behaviors should be implemented in practice, programs, and policies­if not already implemented. When implementing strategies, decision-makers should consider the barriers and facilitators identified by this overview to ensure maximum effectiveness. Protocol registration: PROSPERO: CRD42018093245

Effectiveness of the Diabetes Prevention Program for Obesity Treatment in Real World Clinical Practice in a Middle-Income Country in Latin America.

The Diabetes Prevention Program (DPP) is effective for the prevention of type 2 diabetes by weight loss with diet and physical activity. However, there is little evidence as to whether this program could be translated into real-world clinical practice in Latin American countries. The objective of this work was to evaluate the effectiveness of the DPP for the management of overweightness and obesity at 6 and 12 months in clinical practice in Mexico. This was a non-controlled intervention study implemented in five public clinics in northern Mexico. Two hundred and thirty-seven adults aged 45.7 ± 9.9 years with a Body Mass Index (BMI) of 34.4 ± 5.4 kg/m2 received group sessions with an adaptation of the DPP, in addition to nutrition counseling. One hundred and thirty-three (56%) participants concluded the 6 month phase. They showed a significant weight loss, ranging from 2.76 ± 4.76 to 7.92 ± 6.85 kg (p ≤ 0.01) in the clinics. The intention-to-treat analysis showed a more conservative weight loss. Participant retention at the end of 12 months was low (40%). The implementation of the DPP in different public clinics in Mexico was effective in the management of obesity in the short term, but better strategies are required to improve participant retention in the long term.

Risk factors for chronic kidney disease of non-traditional causes: a systematic review.

OBJECTIVES: To evaluate the potential associations between chronic kidney disease of uncertain or non-traditional etiology (CKDnT) and agrochemicals, heat stress, heavy metals, and other factors identified in the literature in any region of the world and at any time. METHODS: This was a systematic review of the most frequent exposures suspected to be possible causes of CKDnT. A search was conducted of PubMed, LILACS, World Wide Science electronic databases, among other sources. Only medium- and high-quality studies were included. The synthesis of evidence included a narrative synthesis, meta-analysis, and meta-regression. RESULTS: Four systematic reviews and 61 primary studies were included. Results of the meta-analysis suggest that exposure to agrochemicals and working in agriculture increase the risk of CKDnT, but this only reached significance for working in agriculture. When cross-sectional studies were excluded, agrochemical exposure became significant. However, there is substantial heterogeneity in the effect sizes. CONCLUSIONS: Based on the existing evidence and the precautionary principle, it is important to implement preventive measures to mitigate the damage caused by CKDnT to both agricultural workers and their communities (i.e., improvement of working conditions, cautious management of agrochemicals, etc.). More high-quality research is needed to measure impact and to build the evidence base.

Risk factors for chronic kidney disease of non-traditional causes: a systematic review

[ABSTRACT]. Objectives. To evaluate the potential associations between chronic kidney disease of uncertain or nontraditional etiology (CKDnT) and agrochemicals, heat stress, heavy metals, and other factors identified in the literature in any region of the world and at any time. Methods. This was a systematic review of the most frequent exposures suspected to be possible causes of CKDnT. A search was conducted of PubMed, LILACS, World Wide Science electronic databases, among other sources. Only medium- and high-quality studies were included. The synthesis of evidence included a narrative synthesis, meta-analysis, and meta-regression. Results. Four systematic reviews and 61 primary studies were included. Results of the meta-analysis suggest that exposure to agrochemicals and working in agriculture increase the risk of CKDnT, but this only reached significance for working in agriculture. When cross-sectional studies were excluded, agrochemical exposure became significant. However, there is substantial heterogeneity in the effect sizes. Conclusions. Based on the existing evidence and the precautionary principle, it is important to implement preventive measures to mitigate the damage caused by CKDnT to both agricultural workers and their communities (i.e., improvement of working conditions, cautious management of agrochemicals, etc.). More high-quality research is needed to measure impact and to build the evidence base.

[RESUMEN]. Objetivos. Evaluar las posibles asociaciones de la enfermedad renal crónica de etiología incierta o no tradicional (ERCnT) con los agroquímicos, el estrés por calor, los metales pesados y otros factores señalados en la bibliografía de cualquier región del mundo y en cualquier período. Métodos. La presente es una revisión sistemática de las exposiciones más frecuentes que se sospecha podrían ser posibles causas de la ERCnT. Se realizó una búsqueda en las bases de datos electrónicas de PubMed, LILACS y World Wide Science, entre otras fuentes. Se incluyeron solamente estudios de calidad media y alta. La síntesis de la evidencias incluyó síntesis narrativa, metanálisis y metarregresión. Resultados. Se incluyeron cuatro revisiones sistemáticas y 61 estudios primarios. Los resultados del metaanálisis sugieren que la exposición a agroquímicos y el trabajo agrícola aumentan el riesgo de ERCnT, pero esto solo alcanzó un nivel significativo con respecto al trabajo agrícola. Al excluir los estudios transversales, la exposición a agroquímicos se tornó significativa. Sin embargo, existe una heterogeneidad sustancial en las magnitudes del efecto. Conclusiones. Con base en las pruebas científicas existentes y en el principio de precaución, es importante aplicar medidas preventivas para mitigar el daño ocasionado por la ERCnT tanto para los agricultores como para sus comunidades (es decir, mejoras en las condiciones de trabajo, uso prudente de agroquímicos, etc.). Es necesario aumentar la investigación de alta calidad para medir el impacto y ampliar la base de pruebas científicas.

[RESUMO]. Objetivos. Avaliar as associações em potencial entre doença renal crônica de etiologia incerta ou não tradicional e produtos agroquímicos, estresse térmico, metais pesados e outros fatores identificados na literatura em qualquer região do globo ou espaço de tempo. Métodos. Trata-se de uma revisão sistemática dos tipos mais comuns de exposição suspeitas de serem possíveis causas de doença renal crônica de etiologia incerta ou não tradicional. Foram pesquisadas as bases de dados eletrônicas PubMed, LILACS, World Wide Science, entre outras fontes. Somente foram incluídos estudos de qualidade intermediária e alta. Síntese narrativa, meta-análise e metarregressão foram usadas para sumarizar as evidências. Resultados. Este estudo compreendeu quatro estudos de revisão sistemática e 61 estudos primários. Os resultados da meta-análise indicaram que a exposição a produtos agroquímicos e o trabalho na agricultura aumentam o risco de doença renal crônica de etiologia incerta ou não tradicional, com risco significativo apenas para o trabalho na agricultura. Após a exclusão dos estudos transversais, a exposição a produtos agroquímicos também representou um risco significativo. Porém, observou-se considerável heterogeneidade nos tamanhos do efeito. Conclusões. Diante das evidências existentes e com base no princípio da precaução, é importante implementar medidas preventivas para atenuar os danos causados pela doença renal crônica de etiologia incerta ou não tradicional aos trabalhadores e às comunidades agrícolas, como melhoria das condições de trabalho e manipulação cautelosa dos produtos agroquímicos, entre outros. Faz-se necessário realizar outras pesquisas de alta qualidade para avaliar o impacto e aumentar a base de evidências.

Food insecurity was associated with low quality diet and low HDL level in mothers of Northwest Mexico relying on fisheries for livelihood.

BACKGROUND: food insecurity occurs when quality and quantity of food is insufficient for maintaining healthy nutritional and food profiles. OBJECTIVES: to determine if food insecurity is associated with dietary and biochemical measures in mothers of the northwest of Mexico, which relies primarily on fisheries for livelihood. METHODS: a cross-sectional study was conducted with 116 mothers of the Northwest of Mexico. A socioeconomic survey, food security scale, andtwo non-consecutive 24-hour recalls were applied. Anthropometric  measurements were made and hemoglobin, glucose and cholesterol levelswere measured. The association between key measures and food insecurity was assessed using logistic and linear regression. RESULTS: two-thirds (68%) of households experienced food insecurity. Mothers with mild insecurity had 3.7 and 3.2 times higher odds of not consuming fruits and vegetables, respectively, and 4.9 times higher odds of consuming sweetened non-dairy drinks (p = 0.04; 0.04 and 0.05, respectively). In addition, they consumed less protein (ß = -3.22%; p < 0.01) and more carbohydrates (ß = 6.04%; p = 0.02) compared with mothers with food security. Mothers with severe insecurity consumed less iodine (ß = -24.41 µg; p = 0.03) and had lower levels of HDL cholesterol (ß = -12.01 mg/dl; p = 0.03) than mothers with food security. CONCLUSIONS: food insecurity was associated with low quality diet and low levels of HDL cholesterol in mothers of Northwest Mexico relying on fisheries for livelihood.

Prevalence of asymptomatic Zika virus infection: a systematic review.

OBJECTIVE: To conduct a systematic review to estimate the prevalence of asymptomatic Zika virus infection in the general population and in specific population groups. METHODS: We searched PubMed®, Embase® and LILACS online databases from inception to 26 January 2018. We included observational epidemiological studies where laboratory testing was used to confirm positive exposure of participants to Zika virus and in which Zika virus symptom status was also recorded. We excluded studies in which having symptoms of Zika virus was a criterion for inclusion. The main outcome assessed was percentage of all Zika virus-positive participants who were asymptomatic. We used a quality-effects approach and the double arcsine transformation for the meta-analysis. FINDINGS: We assessed 753 studies for inclusion, of which 23 were included in the meta-analysis, totalling 11 305 Zika virus-positive participants. The high degree of heterogeneity in the studies (I2 = 99%) suggests that the pooled prevalence of asymptomatic Zika virus-positive participants was probably not a robust estimate. Analysis based on subgroups of the population (general population, returned travellers, blood donors, adults with Guillain-Barré syndrome, pregnant women and babies with microcephaly) was not able to explain the heterogeneity. Funnel and Doi plots showed major asymmetry, suggesting selection bias or true heterogeneity. CONCLUSION: Better-quality research is needed, using standardized methods, to determine the true prevalence of asymptomatic Zika virus and whether it varies between populations or over time.

Effect of the Holiday Season on Weight Gain: A Narrative Review.

Several studies suggest that the holiday season, starting from the last week of November to the first or second week of January, could be critical to gaining weight. This study aims to review the literature to determine the effects of the holidays on body weight. In studies of adults, a significant weight gain was consistently observed during this period (0.4 to 0.9 kg, p < 0.05). The only study in college students found an effect on body fat but not on weight (0.1 kg, p = 0.71). The only study found in children did not show an effect on BMI percentile (-0.4%, p > 0.05) during this period. Among individuals with obesity who attempt to lose weight, an increase in weight was observed (0.3 to 0.9 kg, significant in some but not in all studies), as well as increase in weight in motivated self-monitoring people (0.4 to 0.6%, p < 0.001). Programs focused on self-monitoring during the holidays (phone calls and daily mailing) appeared to prevent weight gain, but information is limited. The holiday season seems to increase body weight in adults, even in participants seeking to lose weight and in motivated self-monitoring people, whereas in children, adolescents, and college students, very few studies were found to make accurate conclusions.

What are the best methodologies for rapid reviews of the research evidence for evidence-informed decision making in health policy and practice: a rapid review.

BACKGROUND: Rapid reviews have the potential to overcome a key barrier to the use of research evidence in decision making, namely that of the lack of timely and relevant research. This rapid review of systematic reviews and primary studies sought to answer the question: What are the best methodologies to enable a rapid review of research evidence for evidence-informed decision making in health policy and practice? METHODS: This rapid review utilised systematic review methods and was conducted according to a pre-defined protocol including clear inclusion criteria (PROSPERO registration: CRD42015015998). A comprehensive search strategy was used, including published and grey literature, written in English, French, Portuguese or Spanish, from 2004 onwards. Eleven databases and two websites were searched. Two review authors independently applied the eligibility criteria. Data extraction was done by one reviewer and checked by a second. The methodological quality of included studies was assessed independently by two reviewers. A narrative summary of the results is presented. RESULTS: Five systematic reviews and one randomised controlled trial (RCT) that investigated methodologies for rapid reviews met the inclusion criteria. None of the systematic reviews were of sufficient quality to allow firm conclusions to be made. Thus, the findings need to be treated with caution. There is no agreed definition of rapid reviews in the literature and no agreed methodology for conducting rapid reviews. While a wide range of 'shortcuts' are used to make rapid reviews faster than a full systematic review, the included studies found little empirical evidence of their impact on the conclusions of either rapid or systematic reviews. There is some evidence from the included RCT (that had a low risk of bias) that rapid reviews may improve clarity and accessibility of research evidence for decision makers. CONCLUSIONS: Greater care needs to be taken in improving the transparency of the methods used in rapid review products. There is no evidence available to suggest that rapid reviews should not be done or that they are misleading in any way. We offer an improved definition of rapid reviews to guide future research as well as clearer guidance for policy and practice.

Interventions that facilitate sustainable jobs and have a positive impact on workers’ health: an overview of systematic reviews / Intervenciones que facilitan el empleo sostenible y tienen un impacto positivo en la salud de los trabajadores: una síntesis de revisiones sistemáticas

Objective. To identify interventions that facilitate sustainable jobs and have a positive impact on the health of workers in health sector workplaces. Methods. This overview utilized systematic review methods to synthesize evidence from multiple systematic reviews and economic evaluations. A comprehensive search was conducted based on a predefined protocol, including specific inclusion criteria. To be classified as “sustainable,” interventions needed to aim (explicitly or implicitly) to 1) have a positive impact on at least two key dimensions of the integrated framework for sustainable development and 2) include measures of health impact. Only interventions conducted in, or applicable to, health sector workplaces were included. Results. Fourteen systematic reviews and no economic evaluations met the inclusion criteria for the overview. The interventions that had a positive impact on health included 1) enforcement of occupational health and safety regulations; 2) use of the “degree of experience rating” feature of workers’ compensation; 3) provision of flexible working arrangements that increase worker control and choice; 4) implementation of certain organizational changes to shift work schedules; and 5) use of some employee participation schemes. Interventions with negative impacts on health included 1) downsizing/restructuring; 2) temporary and insecure work arrangements; 3) outsourcing/home-based work arrangements; and 4) some forms of task restructuring. Conclusions. What is needed now is careful implementation, in health sector workplaces, of interventions likely to have positive impacts, but with careful evaluation of their effects including possible adverse impacts. Well-evaluated implementation of the interventions (including those at the pilot-study stage) will contribute to the evidence base and inform future action. Interventions with negative health impacts should be withdrawn from practice (through regulation, where possible). If use of these interventions is necessary, for other reasons, considerable care should be taken to

Objetivo. Determinar las intervenciones que facilitan el empleo sostenible y tienen un impacto positivo en la salud de los trabajadores del sector de la salud. Métodos. En esta síntesis se utilizaron métodos de revisión sistemática a fin de resumir los datos de múltiples revisiones sistemáticas y evaluaciones económicas. Se realizó una amplia búsqueda de acuerdo con un protocolo predefinido, que incluyó criterios de inclusión específicos. Para que se clasificaran como “sostenibles” las intervenciones debían estar dirigidas (explícitamente o implícitamente) a: 1) tener una repercusión positiva en al menos dos dimensiones clave del marco integrado para el desarrollo sostenible y 2) incluir mediciones de los efectos de salud. Solo fueron incluidas las intervenciones realizadas en los lugares de trabajo del sector de la salud, o aplicables a este entorno. Resultados. Catorce revisiones sistemáticas reunieron los criterios de inclusión en la síntesis, pero ninguna evaluación económica los reunió. Las intervenciones que tuvieron un impacto positivo en la salud fueron, entre otras: 1) cumplimiento de los reglamentos en materia de salud y seguridad ocupacionales; 2) inclusión del factor de “ajuste por frecuencia siniestral” del sistema de aseguramiento de los riesgos del trabajo; 3) introducción de modalidades de trabajo flexibles que aumentan el control y la elección de los trabajadores; 4) adopción de determinados cambios organizativos para modificar los horarios de trabajo y 5) establecimiento de algún mecanismo de participación de los empleados. Las intervenciones que tuvieron una repercusión negativa en la salud incluyeron 1) reestructuración y recortes; 2) contrato de trabajo temporal y precario; 3) contratación externa y trabajo desde el domicilio y 4) algunas formas de reestructuración de tareas. Conclusiones. Es necesario ejecutar cuidadosamente en los lugares de trabajo del sector de la salud las intervenciones con más probabilidades de tener un impacto positivo y evaluar cuidadosamente la ejecución de dichas intervenciones, incluidos los posibles efectos adversos. La ejecución apropiadamente evaluada de las intervenciones (incluidas aquellas en la etapa de prueba piloto) contribuirá a ampliar la base empírica y sustentar la acción futura. Las intervenciones que repercuten negativamente en la salud deberían ser eliminadas de la práctica (en lo posible, mediante la reglamentación). Si por alguna razón esas intervenciones fueran necesarias, se debería tener el suficiente cuidado de garantizar un equilibrio adecuado entre las necesidades institucionales y la salud y el bienestar humanos.

Interventions that facilitate sustainable jobs and have a positive impact on workers’ health: an overview of systematic reviews / Intervenciones que facilitan el empleo sostenible y tienen un impacto positivo en la salud de los trabajadores: una síntesis de revisiones sistemáticas

ABSTRACT Objective To identify interventions that facilitate sustainable jobs and have a positive impact on the health of workers in health sector workplaces. Methods This overview utilized systematic review methods to synthesize evidence from multiple systematic reviews and economic evaluations. A comprehensive search was conducted based on a predefined protocol, including specific inclusion criteria. To be classified as “sustainable,” interventions needed to aim (explicitly or implicitly) to 1) have a positive impact on at least two key dimensions of the integrated framework for sustainable development and 2) include measures of health impact. Only interventions conducted in, or applicable to, health sector workplaces were included. Results Fourteen systematic reviews and no economic evaluations met the inclusion criteria for the overview. The interventions that had a positive impact on health included 1) enforcement of occupational health and safety regulations; 2) use of the “degree of experience rating” feature of workers’ compensation; 3) provision of flexible working arrangements that increase worker control and choice; 4) implementation of certain organizational changes to shift work schedules; and 5) use of some employee participation schemes. Interventions with negative impacts on health included 1) downsizing/restructuring; 2) temporary and insecure work arrangements; 3) outsourcing/home-based work arrangements; and 4) some forms of task restructuring. Conclusions What is needed now is careful implementation, in health sector workplaces, of interventions likely to have positive impacts, but with careful evaluation of their effects including possible adverse impacts. Well-evaluated implementation of the interventions (including those at the pilot-study stage) will contribute to the evidence base and inform future action. Interventions with negative health impacts should be withdrawn from practice (through regulation, where possible). If use of these interventions is necessary, for other reasons, considerable care should be taken to ensure an appropriate balance between business needs and human health and well-being.

ABSTRACT Objetivo Determinar las intervenciones que facilitan el empleo sostenible y tienen un impacto positivo en la salud de los trabajadores del sector de la salud. Métodos En esta síntesis se utilizaron métodos de revisión sistemática a fin de resumir los datos de múltiples revisiones sistemáticas y evaluaciones económicas. Se realizó una amplia búsqueda de acuerdo con un protocolo predefinido, que incluyó criterios de inclusión específicos. Para que se clasificaran como “sostenibles” las intervenciones debían estar dirigidas (explícitamente o implícitamente) a: 1) tener una repercusión positiva en al menos dos dimensiones clave del marco integrado para el desarrollo sostenible y 2) incluir mediciones de los efectos de salud. Solo fueron incluidas las intervenciones realizadas en los lugares de trabajo del sector de la salud, o aplicables a este entorno. Resultados Catorce revisiones sistemáticas reunieron los criterios de inclusión en la síntesis, pero ninguna evaluación económica los reunió. Las intervenciones que tuvieron un impacto positivo en la salud fueron, entre otras: 1) cumplimiento de los reglamentos en materia de salud y seguridad ocupacionales; 2) inclusión del factor de “ajuste por frecuencia siniestral” del sistema de aseguramiento de los riesgos del trabajo; 3) introducción de modalidades de trabajo flexibles que aumentan el control y la elección de los trabajadores; 4) adopción de determinados cambios organizativos para modificar los horarios de trabajo y 5) establecimiento de algún mecanismo de participación de los empleados. Las intervenciones que tuvieron una repercusión negativa en la salud incluyeron 1) reestructuración y recortes; 2) contrato de trabajo temporal y precario; 3) contratación externa y trabajo desde el domicilio y 4) algunas formas de reestructuración de tareas. Conclusiones Es necesario ejecutar cuidadosamente en los lugares de trabajo del sector de la salud las intervenciones con más probabilidades de tener un impacto positivo y evaluar cuidadosamente la ejecución de dichas intervenciones, incluidos los posibles efectos adversos. La ejecución apropiadamente evaluada de las intervenciones (incluidas aquellas en la etapa de prueba piloto) contribuirá a ampliar la base empírica y sustentar la acción futura. Las intervenciones que repercuten negativamente en la salud deberían ser eliminadas de la práctica (en lo posible, mediante la reglamentación). Si por alguna razón esas intervenciones fueran necesarias, se debería tener el suficiente cuidado de garantizar un equilibrio adecuado entre las necesidades institucionales y la salud y el bienestar humanos.

Agriculture, food, and nutrition interventions that facilitate sustainable food production and impact health: an overview of systematic reviews / Intervenciones agropecuarias, alimentarias y nutricionales que favorecen la producción sostenible de alimentos e inciden en la salud: síntesis de revisiones sistemáticas

ABSTRACT Objectives To identify the agriculture, food, and nutrition security interventions that facilitate sustainable food production and have a positive impact on health. Methods Systematic review methods were used to synthesize evidence from multiple systematic reviews and economic evaluations through a comprehensive search of 17 databases and 10 websites. The search employed a pre-defined protocol with clear inclusion criteria. Both grey and peer-reviewed literature published in English, Spanish, and Portuguese between 1 January 1997 and November 2013 were included. To classify as “sustainable,” interventions needed to aim to positively impact at least two dimensions of the integrated framework for sustainable development and include measures of health impact. Results Fifteen systematic reviews and seven economic evaluations met the inclusion criteria. All interventions had some impact on health or on risk factors for health outcomes, except those related to genetically modified foods. Impact on health inequalities was rarely measured. All interventions with economic evaluations were very cost-effective, had cost savings, or net benefits. In addition to impacting health (inclusive social development), all interventions had the potential to impact on inclusive economic development, and some, on environmental sustainability, though these effects were rarely assessed. Conclusions What is needed now is careful implementation of interventions with expected positive health impacts but with concurrent, rigorous evaluation. Possible impact on health inequalities needs to be considered and measured by future primary studies and systematic reviews, as does impact of interventions on all dimensions of sustainable development.

RESUMEN Objetivos Definir las intervenciones agropecuarias, alimentarias y relativas a la seguridad nutricional que favorecen la producción sostenible de alimentos y tienen efectos positivos sobre la salud. Métodos Se utilizaron métodos de revisión sistemática para sintetizar los datos obtenidos de múltiples revisiones sistemáticas y evaluaciones económicas mediante una búsqueda amplia en 17 bases de datos y 10 sitios web conforme a un protocolo predefinido que constaba de criterios de inclusión claros. La búsqueda incluyó tanto bibliografía gris como arbitrada publicada en inglés, español y portugués entre el 1 de enero de 1997 y 1 de noviembre del 2013. Se consideraron “sostenibles” las intervenciones que tuvieron efectos positivos en al menos dos dimensiones del marco integrado para el desarrollo sostenible y que evaluaron los efectos sobre la salud. Resultados Cumplieron con los criterios de inclusión 15 revisiones sistemáticas y 7 evaluaciones económicas. Todas las intervenciones tuvieron algún efecto sobre la salud o sobre los factores de riesgo de algunos resultados en materia de salud, a excepción de aquellas relacionadas con los alimentos transgénicos. Muy pocos estudios determinaron el efecto de las intervenciones sobre las desigualdades en materia de salud. Todas las intervenciones sometidas a evaluaciones económicas fueron muy eficaces en función de los costos, redujeron los costos o lograron beneficios netos. Además de incidir en la salud (en la dimensión “desarrollo social inclusivo”), todas las intervenciones podrían influir en la dimensión “desarrollo económico inclusivo” y algunas sobre la dimensión “sostenibilidad ambiental”, aunque estos efectos fueron evaluados en muy pocas revisiones sistemáticas. Conclusiones La ejecución cuidadosa de las intervenciones cuya aplicación prevé efectos positivos para la salud debe acompañarse de una evaluación rigurosa. Es preciso tener en cuenta y evaluar, mediante futuros estudios primarios y revisiones sistemáticas, tanto los posibles efectos sobre las desigualdades en materia de salud como las repercusiones de las intervenciones en todas las dimensiones del desarrollo sostenible.