[Relationship on the prevalence of physical activity to depressive symptoms and satisfaction of school life among middle school students in Bengbu, Anhui province].

OBJECTIVE: To describe the prevalence and relationship between physical activity (PA), depressive symptoms and school life satisfaction among middle school students in Bengbu, Anhui province. METHODS: A total number of 5268 boys and girls were analyzed from 4 middle schools. Depressive symptoms were assessed, using the Depression Self-rating Scale for Children, school life satisfaction via the School Life Satisfaction Rating Questionnaire. Self-reported PA and sedentary behaviors were also assessed. Descriptive statistics and logistic regression models were used. RESULTS: Adolescents self-reported rates of participating in sufficient moderate, vigorous and insufficient PA were 14.7%, 36.0% and 59.1%, respectively. The prevalence rates on depressive symptoms and school life dissatisfaction were 24.4% and 25.9%. After adjusting on sedentary behaviors and other potential confounders, participants who had engaged in sufficient moderate and vigorous PA had odds ratios of 0.73 (0.60 - 0.89), 0.68 (0.59 - 0.79) and 0.76 (0.63 - 0.92), 0.70 (0.61 - 0.81) for likelihood of being depressive and school life dissatisfaction, compared to their counterparts who participating in insufficient moderate and vigorous PA. Insufficient PA was positively associated with depression and dissatisfaction of their school lives [OR (95%CI): 1.42 (1.24 - 1.63) and 1.45 (1.27 - 1.66)]. CONCLUSION: High prevalence of insufficient PA was seen among adolescents and PA was closely related to the presence of depressive symptoms and school life dissatisfaction among middle school students.

Is there any relationship between dietary patterns and depression and anxiety in Chinese adolescents?

OBJECTIVE: To determine the association between major dietary patterns characterized by factor analysis and risk of depression and anxiety symptoms among adolescents. DESIGN: Diet and symptoms of depression and anxiety were assessed in a cross-sectional survey among students attending junior high school. Dietary patterns were derived from a self-reported FFQ, which consisted of thirty-eight items. Anthropometric measurements were also performed. SETTING: Four junior high schools in Bengbu city, China. SUBJECTS: A random sample of 5003 adolescents, 11-16 years of age (mean 13·21 years). RESULTS: Three major dietary patterns were identified in the study based on factor analysis: 'snack', 'animal food' and 'traditional'. The prevalence of depression symptoms, anxiety disorders and the coexistence of both were 11·2% (560/5003), 14·6% (732/5003) and 12·6% (629/5003), respectively. After adjustment for potential confounders, adolescents in the highest tertile of snack dietary pattern scores had a higher odds for 'pure' psychological symptoms ('depression without anxiety', OR = 1·64; 95% CI 1·30, 2·06; and 'anxiety without depression', OR = 1·87; 95% CI 1·51, 2·31) compared with coexisting depression and anxiety (OR = 1·93; 95% CI 1·54, 2·43). Similar to snacks, high consumption of animal foods was associated with a higher risk of psychological symptoms. Compared with low consumption, adolescents in the highest tertile of traditional dietary pattern scores had lower odds for 'pure' depression (OR = 0·38; 95% CI 0·30, 0·49), 'pure' anxiety (OR = 0·85; 95% CI 0·69, 1·04) and coexisting anxiety and depression (OR = 0·50; 95% CI 0·39, 0·63). CONCLUSIONS: Data from Chinese secondary-school adolescents validated findings from adult populations. Dietary patterns should be considered as important predictors of depression and anxiety among adolescents in further studies.