Effects of Food-Based Approaches on Vitamin A Status of Women and Children: A Systematic Review.

Vitamin A deficiency (VAD) increases risk for morbidity and mortality. Food-based approaches offer one strategy to improve vitamin A status. This systematic review assessed evidence of the effects of food-based approaches on the vitamin A status of women and children under 5 y. VAD was defined as clinical ocular symptoms, such as loss of vision, and/or retinol plasma or serum concentration <0.70 µmol/L. Searches on food-based approaches to improve vitamin A status were conducted for the period 2011-2022 on PubMed, CINHAL, Web of Science, and Google Scholar using PRISMA guidelines. English-language publications were included. Case studies, unpublished dissertations, and non-peer-reviewed studies were excluded. This review comprises 24 of 27,322 identified studies; 23 included studies focused on provitamin A carotenoids. There were 17,214 participants across the 24 studies with sample sizes ranging from 8 to 3571 individuals. Intervention studies spanned from 3 wk to 2 y. Fifteen (63%) studies were randomized control trials, 7 were cross-sectional, and 2 were longitudinal studies. Most studies (N = 21) used biochemical measurements, for example, serum retinol, to assess vitamin A status; other studies used clinical symptoms (for example, xerophtalmia) or dietary intake. Thirteen (54%) studies reported a statistically significant effect of food-based interventions (N = 8) or an association of diet (N = 5) on vitamin A status. This systematic review indicated that some food-based interventions improved vitamin A status, thus offering a safe and effective delivery mechanism for vitamin A. There appeared to be significant association between vitamin A status and consumption of foods with high concentrations of preformed vitamin A and provitamin A carotenoids. Differences across studies in regard to the period of evaluation, food approaches used, and statistical power may explain the lack of effectiveness of food-based approaches on vitamin A status in some studies.

Social connectedness and surviving at the margins: Findings from interviews with low-income Latino men in the U.S. Northeast.

OBJECTIVES: Structural and interpersonal discrimination can lead to social exclusion and limited social integration, inhibiting the use of support networks to gain access to health-protective material and social resources. Social support theories suggest that connectedness may moderate the link between discrimination and health risk. This study examined how risk factors (i.e., structural and interpersonal discrimination) further marginalize Puerto Rican men by limiting access to social support. We also aimed to identify resiliency factors, such as cultural values related to social interactions and community support, which may be protective for these men's well-being. METHOD: We conducted 40 semistructured interviews with a stratified purposeful sample of Puerto Rican (92.5%) men aged 25-70 (Mage = 50.7) in the U.S. Northeast. A hybrid deductive and inductive thematic qualitative analysis was used to analyze data. RESULTS: Participants discussed how structural and interpersonal discrimination result in inequities and barriers to resources and services (e.g., lack of adequate shelter, insecurity, employment) which impacted their well-being through the inability to access fundamental support for survival. The men identified cultural values (e.g., familismo, simpatía) and emphasized the importance of community support as protective factors that may provide a respite from the difficulties of navigating discrimination experiences. CONCLUSION: Findings suggest discrimination limits Puerto Rican men's ability to access resources, which has a detrimental impact on their well-being. Identifying social support beyond the family, and considering cultural values related to support, can enhance community interventions by focusing on incorporating multiple forms of support that may improve Puerto Rican men's health. (PsycInfo Database Record (c) 2023 APA, all rights reserved).

The impact of stay-at-home regulations on adolescents' feelings of loneliness and internalizing symptoms.

INTRODUCTION: The COVID-19 pandemic disrupted the daily social lives of adolescents by severely limiting social interactions which likely heightened levels of loneliness and a variety of internalizing symptoms. However, little is known about how social distancing adherence and subsequent stress caused by the novel social regulations impact adolescents' feelings of loneliness, and later mental health difficulties, including anxiety and depression. METHOD: To close this gap, we examined the impact of social distancing regulations on adolescents' (N = 79; Mage = 16.16, SD = 1.15; 47 females; 23 males) depression and anxiety symptoms through loneliness by using data from a 5-week longitudinal study conducted on adolescents in the United States during the initial phases of COVID-19. RESULTS AND CONCLUSIONS: Findings provided evidence that loneliness plays a unique mediating link between social distancing and symptoms of anxiety and depression. Overall, the present study highlights how social distancing during the COVID-19 pandemic has impacted adolescents' mental health during a developmental period that is considered a turning point for psychopathology.

Predictors of vitamin A rich food consumption among women living in households growing orange-fleshed sweetpotatoes in selected regions in Uganda.

Objective: Vitamin A deficiency (VAD) has serious public health consequences including morbidity and mortality for populations in low and middle-income countries (LMICs), especially for children under 5 years and pregnant women. LMICs are at greater risk of VAD, in part due to low levels of consumption of vitamin A-rich foods most of which are plant-based, such as orange-fleshed sweet potatoes (OFSP), with lower bioavailability than animal sources of the vitamin A. Food-based approaches such as biofortification of OFSP, including promoting the consumption of vitamin A-rich biofortified staple crops, has been shown to be potentially effective in improving the status of vitamin A and other micronutrients. This study examined vitamin A-rich food consumption and its predictors among women of reproductive age from OFSP-growing households in two regions of Uganda. Methods: A cross-sectional survey was conducted among 617 OFSP growing households, focusing on women in the reproductive age group from the northern and eastern regions of Uganda. Households were not receiving any VAD-related intervention at the time of the survey. Quantitative data included vitamin A-rich food consumption, knowledge on vitamin A, and rich food sources dietary intake, using a 7-day food frequency questionnaire. Vitamin A consumption and risk of deficiency were estimated using the Hellen Keller International guide. Results: The majority of women in this study were either pregnant (80%) or lactating (17%). More than 70% of the study population had a weighted vitamin A rich food consumption mean score of <6 days per week, indicating a high risk of VAD. Knowledge about vitamin A [b (SE) = -0.18 (0.50), p < 0.001] was significantly and inversely associated with vitamin A rich food consumption. Conclusion: Components of food insecurity such as availability, affordability, utilization, and changing food preferences may contribute to the unexpected inverse relationship between knowledge and consumption of vitamin A rich foods. Scaling up biofortified food initiatives, including OFSP, can improve consumption of vitamin A rich foods with effective strategies to comprehensively address consumption barriers such as lack of nutrition education, cooking skills, and storage facilities, as well as low production levels and perceived contamination of biofortified foods.

Psychology Doctoral Program Experiences and Student Well-Being, Mental Health, and Optimism During the COVID-19 Pandemic.

In a sample of 916 doctoral students from 144 universities across the United States, we examined psychology graduate students' experiences in their programs, as well as their mental health, well-being, and optimism during the onset of the COVID-19 pandemic. In a path model, we found that students' psychological experiences in their programs (i.e., social belonging, threat, and challenge) were associated with better mental health and well-being, which in turn was associated with greater optimism about the future during the COVID-19 pandemic. These findings were also corroborated in students' open-ended responses regarding how COVID-19 has impacted their lives. Findings varied by racial, gender, and sexual identities, as racial minorities, LGBTQ+ students, and women expressed more negative psychological experiences in their programs. We outline suggestions for graduate programs to support their graduate students, which include facilitating social connection, providing encouragement, and emphasizing students' well-being over their productivity as the current pandemic persists.

Discrimination and health: A dyadic approach.

This study examined how discrimination changes over time, how discrimination is related to health and substance use, and whether discrimination spills over to affect the health of family members. Parent-adolescent dyads (N = 341) completed measures of discrimination, physical health, mental health, and substance use over 5 years. Actor-Partner Interdependence Models indicated that individuals' experiences of discrimination can spill over to some aspects of the family context, depending on who is experiencing discrimination (i.e. parent, adolescent) and the outcome (i.e. mental health, substance use). Results suggest that parent-reported discrimination may affect adolescent depression, and adolescent-reported discrimination can spill over to parents' substance use.

The Importance of Biobehavioral Research to Examine the Physiological Effects of Racial and Ethnic Discrimination in the Latinx Population.

A growing body of research is documenting how racial and ethnic populations embody social inequalities throughout the life course. Some scholars recommend the integration of biospecimens representing the hypothalamic-pituitary-adrenal axis, neurological and endocrinological processes, and inflammation to capture the embodiment of inequality. However, in comparison to other racial and ethnic groups, there has been little research examining how Hispanic/Latinx persons embody racial and ethnic discrimination, much less resulting from institutional and structural racism. We provide a rationale for expanding biobehavioral research examining the physiological consequences of racism among Latinx persons. We identify gaps and make recommendations for a future research agenda in which biobehavioral research can expand knowledge about chronic disease inequities among Latinx populations and inform behavioral and institutional interventions. We end by cautioning readers to approach the recommendations in this article as a call to expand the embodiment of racism research to include the diverse Latinx population as the United States addresses racial inequity.

Emotional Coregulation in Mexican-Origin Parent-Adolescent Dyads: Associations with Adolescent Mental Health.

Research on the health benefits and consequences of close relationships has suggested the linkage in daily emotions (i.e., coregulation) between close partners is an important relationship dynamic. While the coupling of daily emotions among family members (parent-child and marital dyads) has been widely documented, research examining emotional coregulation among ethnic minority youth during adolescence, a period marked by heightened emotion and risk for psychopathology, remains an important area in need of exploration. This study examined correlates of emotional coregulation in a sample of Mexican-origin adolescents (Mage = 15.02, SD = .83) and their parents (Mage = 41.93, SD = 6.70). Dyads reported on daily levels of distress and happiness for 14 consecutive days across two waves of data collection a year apart (nwave1 = 428 dyads, nwave2 = 336 dyads). Dyads who reported getting along were more likely to coregulate their daily happiness. Importantly, coregulation of distress was only present in older adolescents who reported above average levels of internalizing symptoms. The results suggest coregulation of distress may shape or be shaped by poor mental health during the later years of adolescence, a time when youth may be establishing a degree of emotional autonomy from parents.

Child Maltreatment and Mother-Child Transmission of Stress Physiology.

In the current study, we examined the attunement and transmission of mother-child diurnal cortisol among maltreating (N = 165) and nonmaltreating (N = 83) mothers and their preschool-aged children. Over half of the families had a substantiated child maltreatment case with the mother as the perpetrator. Mothers collected three saliva samples (waking, midday, and bedtime) on themselves and their child on two consecutive days, which were later assayed for cortisol. This design allows for the examination of concurrent attunement, as well as cross-lagged transmission, across the day. Results from actor-partner interdependence models revealed significant differences in mother-child cortisol attunement and transmission between the maltreating and nonmaltreating groups. Specifically, only maltreating mothers transmitted cortisol to their children and were attuned at first waking; only nonmaltreating dyads were attuned at midday. Implications of these results for sociocultural models of stress physiology and for our understanding of how child maltreatment affects diurnal cortisol regulation are discussed.

Marital Conflict Predicts Mother-to-Infant Adrenocortical Transmission.

Employing an experimental design, mother-to-infant transmission of stress was examined. Mothers (N = 117) were randomized to either have a positive or conflictual discussion with their marital partners, after which infants (age = 6 months) participated in a fear and frustration task. Saliva samples were collected to assess maternal cortisol responses to the discussion and infant cortisol responses to the challenge task. Results indicate maternal cortisol reactivity and recovery to the conflict (but not positive) discussion predicted infant cortisol reactivity to the infant challenge. Mothers' positive affect during the discussion buffered, and intrusion during the free-play potentiated, mother-to-infant adrenocortical transmission. These findings advance our understanding of the social and contextual regulation of adrenocortical activity in early childhood.

The impact of marital withdrawal and secure base script knowledge on mothers' and fathers' parenting.

The current study examines associations between marital conflict and negative parenting behaviors among fathers and mothers, and the extent to which internal working models (IWMs) of attachment relationships may serve as sources of risk or resilience during family interactions. The sample consisted of 115 families (mothers, fathers, and their 6-month-old infants) who participated in a controlled experiment. Couples were randomly assigned to engage in either a conflict or positive marital discussion, followed by parent-infant freeplay sessions and assessment of parental IWMs of attachment (i.e., secure base script knowledge). While no differences in parenting behaviors emerged between the conflict and positive groups, findings revealed that couple withdrawal during the marital discussion was related to more intrusive and emotionally disengaged parenting for mothers and fathers. Interestingly, secure base script knowledge was inversely related to intrusion and emotional disengagement for fathers, but not for mothers. Furthermore, only among fathers did secure base script knowledge serve to significantly buffer the impact of marital disengagement on negative parenting (emotional disengagement). Findings are discussed using a family systems framework and expand our understanding of families, and family members, at risk. (PsycINFO Database Record

I love you from the bottom of my hypothalamus: The role of stress physiology in romantic pair bond formation and maintenance.

Monogamous pair bonds helped solve ancestral problems pertinent to our survival as a species. In order for these pair bonds to succeed, biological systems were co-opted to support and reinforce attachment bonds through feelings of pleasure and reward. One of the major biological systems that may play an important role in the formation of romantic attachments is the stress response system (autonomic nervous system and hypothalamic-pituitary-adrenal axis). Research suggests attraction, mate preference, and emotional connectedness may be supported by the activation or inhibition of the stress response system. Further, as romantic relationships progress, new findings suggest partners' physiological patterns coalesce, potentially serving a regulatory function that reinforces the pair bond and affects overall well-being. Based on this evidence, the current paper puts forth the Physiology of Romantic Pair Bond Initiation and Maintenance Model, which will provide researchers with a new perspective on the function of the stress response system in romantic relationships.

Work/non-workday differences in mother, child, and mother-child morning cortisol in a sample of working mothers and their children.

BACKGROUND: Mothers have been shown to have higher morning cortisol on days they go to work compared to non-workdays; however, it is unknown how maternal workday associates with child morning cortisol or the attunement of mother-child morning cortisol. AIMS: This study examined the presence and stability of morning cortisol levels and slopes (i.e., cortisol awakening response or CAR) in a sample of 2-4year old children in out-of-home child care with working mothers. In addition, we examined the differential contributions of maternal workday on mother-child attunement in morning cortisol. METHOD: Mother and child morning cortisol was sampled twice a day (awakening and 30min later) across four consecutive days (2 non-workdays; 2 workdays) among 47 working mothers and their young children. Mothers also reported on compliance with sampling procedures and provided demographic information. RESULTS: While children exhibited stability in cortisol levels, children's CARs were variable, with children's non-work CARs not predictive of work CARs. Similarly, a significant morning rise in cortisol was only found on workdays, not non-workdays. Overall, mothers had higher cortisol levels and steeper CARs than their children. Further, maternal workday moderated the attunement of mother-child morning cortisol, such that mothers and children had concordant cortisol levels on non-workdays, but discordant cortisol levels on workdays. CONCLUSIONS: Morning cortisol may be more variable in pre-school aged children than adults but may be similarly responsive to the social environment. Further, workday mornings may be a time of reduced mother-child cortisol attunement.

Parenting stressors and morning cortisol in a sample of working mothers.

The cortisol awakening response (CAR) is a normative rise in cortisol levels across the 30 minutes post awakening. Both the levels and the degree of change in cortisol across this time period are sensitive to the perceived challenges of the day and are thought to prepare the individual to meet these tasks. However, working parents of young children may be under unique strains at this time as they attempt to simultaneously care for their children while also preparing themselves for the workday ahead. In these analyses we examined the contributions of both work and parenting stress on maternal cortisol levels and awakening responses, and how these relationships differed on workdays compared with nonworkdays. To do this, saliva samples were collected from 56 working mothers (25% single) with a child between the ages of 2 and 4 years old (mode = 2 children), at awakening and 30 min postawakening. Samples were collected on 4 consecutive days-2 nonworkdays followed by 2 workdays. Analyses revealed mothers reporting higher levels of parenting stress had higher average a.m. cortisol on workdays compared with nonworkdays. Further, mothers reporting a combination of high job strain and high parenting stress had significantly higher cortisol levels and steeper CAR increases on workdays compared with nonworkdays. Findings are discussed by integrating knowledge from the fields of parenting stress, work-family, and stress physiology.

Sistemas de conducción en dos variedades de melón (Cucumis melo L.) bajo invernadero en la zona de la Tamborada

El estudio tuvo por finalidad evaluar la respuesta de dos variedades de melón (Cucumis melo L.) la variedad Noney Dew y la variedad amarillo en tres sistemas de conducción (Sistemas de conducción en U, doble U y solitario), conducido en diseño de bloques completamente al azar con cuatro repeticiones. Las variables de respuesta fueron: Porcentaje de emergencia, altura planta, número de flores masculinas, número de flores femeninas, número de flores hermafroditas, número de frutos por planta, altura de fruto, diámetro fruto y peso de fruto. Los efectos de los sistemas de conducción fueron más notorios en las variables altura planta, número de flores masculinas, femeninas, hermafroditas y número de frutos por planta. No se registraron muchas diferencias significativas entre variedades, aunque la variedad Honey Dew en general mostró medias más altas con relación a la variedad Amarillo. Por otro lado los resultados en los sistemas de conducción, mostraron que el sistema en U tiene una respuesta favorable en el cultivo de melón, seguido por los otros dos sistemas, los cuales resultaron un tanto superiores al testigo.