Does physical activity moderate the association between device-measured sedentary time patterns and depressive symptoms in adults?

Objectives: To investigate the association between sedentary time (ST) patterns and depressive symptoms, and whether moderate-to-vigorous physical activity (MVPA) can moderate this association. Methods: This cross-sectional study included a representative sample of 243 adults (mean age 41.8±16.7 years, 56.4% women) from a city in Southeast Brazil. Depressive symptoms were estimated through the Hospital Anxiety and Depression Scale (HADS). ST patterns (i.e., number of breaks, mean length of sedentary bouts, and number of long sedentary bouts), total ST, and MVPA were assessed using accelerometers. Results: Poisson regression models revealed associations of total ST (β = 0.063; 95%CI 0.011 to 0.116) and number of long bouts (0.108; 0.047 to 0.171) with depressive symptoms among men. MVPA moderated the associations of breaks and longer bouts of ST with depressive symptoms, with an increase of one break/hour, the increase of one long bout, and a decrease of 1 minute in mean bout length being associated with a reduction of 0.211 and increases of 0.081 and 0.166, respectively, in the number of depressive symptoms among men with physical inactivity (breaks = -0.211; -0.360 to -0.063; mean bout length = 0.081; 0.003 to 0.158; number of long bouts = 0.166; 0.090 to 0.242). Conclusions: Interventions that encourage breaking up ST should be helpful to reduce depressive symptoms among people with physical inactivity. Clinical trial registration: ClinicalTrials.gov (NCT03986879).

Physical activity and symptoms of anxiety and depression among medical students during a pandemic / Actividad física, síntomas de ansiedad y depresión en estudiantes de medicina durante la pandemia / Atividade física e sintomas de ansiedade e depressão entre estudantes de medicina durante a pandemia

ABSTRACT Introduction: Decreased physical activity has been associated with poorer mental health and is a cause for concern during the COVID-19 pandemic. Objective: To compare groups of medical students (MS) who practiced different levels of moderate and vigorous physical activity (MVPA) during the COVID-19 pandemic, in relation to symptoms of anxiety and depression (BAI-BDI), sleep quality (PSQI), and physical activity (PA) - light, moderate, vigorous (LPA-MPA and VPA), and sedentary behavior (SB). Methods: This research is a cross-sectional study involving 218 MS. Data on the characteristics of the MS were collected through online forms: PA, SB, BAI, BDI, and PSQI. The Cohen's D (Effect Size - ES) and confidence interval (95% CI), Mann-Whitney test: Lower MVPA (Median=0 minute) and Higher MVPA (Median=390 minutes) were recorded. For the statistical analyses, we used: the Odds ratio (OR) for the presence of symptoms of high levels of anxiety and depression and poor sleep quality in the MS and MVPA. Results: We found a small ES for symptoms of depression (ES 0.26 95% CI 0.00 0.53 p=0.029), and significant differences (p<0.05) for symptoms of anxiety (ES 0.17 95% CI −0.09 0.44 p=0.037). There was also a significant tendency for sedentary behavior on weekdays (ES 0.27 95% CI 0.00 0.53 p = 0.051). The OR for MVPA and the presence of symptoms of high levels of anxiety was 0.407 (95% CI = 0.228 to 0.724). Conclusions: the MS who practiced higher MVPA presented less symptoms of anxiety and depression during the COVID-19 pandemic. Level of evidence III; Case-control study.

RESUMEN Introducción: La disminución de la actividad física se ha asociado con un empeoramiento de la salud mental y es motivo de preocupación durante la pandemia de COVID-19. Objetivo: Comparar grupos de estudiantes de medicina (EM) con diferentes momentos de actividad física moderada y vigorosa (AFMV) durante la pandemia COVID-19, en relación a los síntomas de ansiedad y depresión (BAI-BDI), calidad de sueño (PSQI) y actividad física (AF) - comportamiento leve, moderado, vigoroso (LPA-MPA y VPA) y sedentario (SB). Métodos: Esta encuesta transversal evaluó 218 EM. Los datos se recogieron mediante formularios online sobre las características del grupo PA, SB, BAI, BDI y PSQI. D de Cohen (ES) y el intervalo de confianza (IC del 95%), prueba de Mann-Whitney: AFMV baja (mediana = 0 minutos) y AFMV (mediana = 390 minutos); En el análisis estadístico se utilizó la razón de probabilidades (OR) para la presencia de síntomas de ansiedad alta y síntomas depresivos, la mala calidad del sueño de la EM y la MVPA. Resultados: Una pequeña EE para síntomas de depresión (ES 0.26 IC 95% 0.00 0.53 p = 0.029) y diferencias significativas (p <0.05) para síntomas de ansiedad (ES 0.17 IC 95% −0, 09 0.44 p = 0.037). Se verificó tendencia de significancia para el día de la semana SB (ES 0.27 IC 95% 0.00 0.53 p = 0.051). Se verificó la OR para AFMV y la presencia de síntomas de alta ansiedad de 0,407 (IC del 95% = 0,228 a 0,724). Conclusiones: La EM con un AFMV más alto tiene menos síntomas de ansiedad y síntomas de depresión durante la pandemia de COVID-19. Nivel de evidencia III; Estudio de casos y controles.

RESUMO Introdução: A diminuição da atividade física tem sido associada à piora da saúde mental e é motivo de preocupação durante a pandemia de COVID-19. Objetivo: Comparar grupos de estudantes de medicina (EM) que praticam diferentes níveis de atividade física moderada e vigorosa (AFMV) durante a pandemia de COVID-19, com relação aos sintomas de ansiedade e depressão (BAI-BDI), qualidade do sono (PSQI), e atividade física (AF) - leve, moderada, vigorosa (AFL, AFM, AFV) e comportamento sedentário (CS). Métodos: Esta pesquisa com desenho transversal avaliou 218 EM. Os dados das características dos EM foram coletados por meio de formulários on-line: AF, CS, BAI, BDI e PSQI. Para as análises estatísticas, utilizou-se odds ratio (OR) para a presença de sintomas elevados de ansiedade e depressão e má qualidade do sono de EM e AFMV. O D de Cohen (tamanho do efeito, TE) e o intervalo de confiança (IC de 95%), teste de Mann-Whitney: baixa MVPA (mediana = 0 minuto) e alta MVPA (Mediana = 390 minutos) foram registrados. Resultados: Encontramos um pequeno TE para sintomas de depressão (TE 0,26; IC de 95%; 0,00-0,53; p = 0,029) e diferenças significativas (p < 0,05) para sintomas de ansiedade (TE 0,17; IC de 95%; 0,09-0,44; p = 0,037). Também houve tendência de significância para o comportamento sedentário nos dias de semana (TE 0,27; IC de 95%; 0,00-0,53; p = 0,051). A OR para MVPA e a presença de sintomas de ansiedade elevada foi de 0,407 (IC de 95% = 0,228-0,724). Conclusões: Os EM que praticavam maior MVPA apresentaram menos sintomas de ansiedade e depressão durante a pandemia de COVID-19. Nível de evidência III; Estudo de caso-controle.

Risk factors for eating disorders: an umbrella review of published meta-analyses

Objective: To grade the evidence about risk factors for eating disorders (anorexia nervosa, bulimia nervosa, and binge eating disorder) with an umbrella review approach. Methods: This was a systematic review of observational studies on risk factors for eating disorders published in PubMed/PsycInfo/Embase until December 11th, 2019. We recalculated random-effect meta-analyses, heterogeneity, small-study effect, excess significance bias and 95% prediction intervals, grading significant evidence (p < 0.05) from convincing to weak according to established criteria. Quality was assessed with the Assessment of Multiple Systematic Reviews 2 (AMSTAR-2) tool. Results: Of 2,197 meta-analyses, nine were included, providing evidence on 50 risk factors, 29,272 subjects with eating disorders, and 1,679,385 controls. Although no association was supported by convincing evidence, highly suggestive evidence supported the association between childhood sexual abuse and bulimia nervosa (k = 29, 1,103 cases with eating disorders, 8,496 controls, OR, 2.73, 95%CI 1.96-3.79, p = 2.1 x 10-9, AMSTAR-2 moderate quality) and between appearance-related teasing victimization and any eating disorder (k = 10, 1,341 cases with eating disorders, 3,295 controls, OR 2.91, 95%CI 2.05-4.12, p = 1.8x10-9, AMSTAR-2 moderate quality). Suggestive, weak, or no evidence supported 11, 29, and 8 associations, respectively. Conclusions: The most credible evidence indicates that early traumatic and stressful events are risk factors for eating disorders. Larger collaborative prospective cohort studies are needed to identify risk factors for eating disorders, particularly anorexia nervosa.

Lifestyle behaviors among 4,343 Brazilian adults with severe mental illness and 55,859 general population controls: data from the Brazilian National Health Survey

Objective: To analyze the association between severe mental illnesses and health behaviors among Brazilian adults. Methods: We used data from the Brazilian National Health Survey, a large nationally representative cross-sectional study conducted in 2013 among 60,202 adults (≥ 18 years). Clinical diagnoses (major depressive disorder, bipolar disorder and schizophrenia), lifestyle behaviors (leisure-time physical activity, TV viewing, tobacco use and the consumption of alcohol, sweets, and soft drinks) and potential confounders (chronological age, race, educational and employment status) were self-reported. Logistic regression models were used to examine the associations between severe mental illness and lifestyle behaviors, adjusting for confounders. Results: Schizophrenia (n=41) was associated with lower odds of physical activity (OR 0.08 [95%CI 0.01-0.58]). Major depressive disorder (n=4,014) was associated with higher odds of TV viewing (OR 1.34 [95%CI 1.12-1.61]), tobacco use (OR 1.37 (95%CI 1.18-1.58]), consumption of sweets (OR 1.34 (95%CI 1.15-1.55]) and consumption of soft drinks (OR 1.24 (95%CI 1.06-1.45]). There were no significant associations between bipolar disorder (n=47) and any lifestyle behaviors. Conclusions: Schizophrenia was associated with lower physical activity, while major depressive disorder was associated with increased TV viewing, tobacco use, and consumption of sweets and soft drinks. These findings reinforce the need for prevention and treatment interventions that focus on people with severe mental illness in Brazil.

Psychometric properties of the modified Yale Food Addiction Scale 2 0 in a large Brazilian sample

Objective: The field of food addiction has attracted growing research attention. The modified Yale Food Addiction Scale 2.0 (mYFAS 2.0) is a screening tool based on DSM-5 criteria for substance use disorders. However, there is no validated instrument to assess food addiction. Methods: The mYFAS 2.0 has been transculturally adapted to Brazilian Portuguese. The data for this study was obtained through an anonymous web-based research platform: participants provided sociodemographic data and answered Brazilian versions of the the mYFAS 2.0 and the Barratt Impulsivity Scale (BIS-11). Analysis included an assessment of the Brazilian mYFAS 2.0's internal consistency reliability, factor structure, and convergent validity in relation to BIS-11 scores. Results: Overall, 7,639 participants were included (71.3% females; age: 27.2±7.9 years). The Brazilian mYFAS 2.0 had adequate internal consistency reliability (Cronbach's alpha = 0.89). A single factor solution yielded the best goodness-of-fit parameters for both the continuous and categorical version of the mYFAS 2.0 in confirmatory factor analysis. In addition, mYFAS 2.0 correlated with BIS-11 total scores (Spearman's rho = 0.26, p < 0.001) and subscores. Conclusion: The Brazilian mYFAS 2.0 demonstrated adequate psychometric properties in our sample; however, future studies should further evaluate its discriminant validity.

Exercise for depression in older adults: a meta-analysis of randomized controlled trials adjusting for publication bias

Objective: To evaluate the antidepressant effects of exercise in older adults, using randomized controlled trial (RCT) data. Methods: We conducted a meta-analysis of exercise in older adults, addressing limitations of previous works. RCTs of exercise interventions in older people with depression (≥ 60 years) comparing exercise vs. control were eligible. A random-effects meta-analysis calculating the standardized mean difference (SMD) (95% confidence interval [95%CI]), meta-regressions, and trim, fill, and fail-safe number analyses were conducted. Results: Eight RCTs were included, representing 138 participants in exercise arms and 129 controls. Exercise had a large and significant effect on depression (SMD = -0.90 [95%CI -0.29 to -1.51]), with a fail-safe number of 71 studies. Significant effects were found for 1) mixed aerobic and anaerobic interventions, 2) at moderate intensity, 3) that were group-based, 4) that utilized mixed supervised and unsupervised formats, and 5) in people without other clinical comorbidities. Conclusion: Adjusting for publication bias increased the beneficial effects of exercise in three subgroup analysis, suggesting that previous meta-analyses have underestimated the benefits of exercise due to publication bias. We advocate that exercise be considered as a routine component of the management of depression in older adults.