Social, Psychological and Behavioral Risk Factors of Obesity in Adolescents in Vellore

Divya, V S (2015) Social, Psychological and Behavioral Risk Factors of Obesity in Adolescents in Vellore. Masters thesis, Christian Medical College, Vellore.


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OBJECTIVE: To determine the Social ,psychological and behavioral risk factors of obesity in adolescents studying in schools of Vellore. METHODS: This community based case-control study. The study was powered to detect three times greater odds of being depressed among those who are obese as compared those who are non obese using a two sided fisher’s exact test. The sample size calculated for case-control study was 63 cases and 123 controls. In order to identify the requisite number of cases assuming 20% refusal to participate in the case control 750 participants were required to be screened. Finally total of 911 participants were screened and 55 cases and 145 controls were recruited for the study The permission to the conduct this study in high schools was obtained from District Educational Officer. Students’ study serial number, age, height (in cms) and weight (in kg) were entered in Epi-data software. Using WHO-Anthroplus, the data was imported and Z-score and percentiles were calculated for BMI (age adjusted). All students who had BMI percentile of 85% and above were considered as eligible to be selected as cases. From the same school, age and gender matched students (1:3) with BMI percentile <85 were selected as eligible controls. Among the eligible cases and controls, those who gave assent and parent’s consent were included in this study. Bivariate analysis was done using Chi square test to know the associations between categorical variables. Independent 't' test was done to compare means between two groups. After dichotomizing different variables, uni-.variate analysis was done to generate an odds ratio and 95% confidence interval to study the association between overweight and factors related to demographical characters, social networking and psychological factors. Multivariate logistic regression analysis was done to adjust for confounding RESULTS: A total of 911 students were screened across 10 schools for overweight and obesity of whom, 548 (60%) were males and 363 (40%) were females. Among the 911 children, 115 (12.6%) were overweight and 3 (0.3%) were found to obese. The risk factors we looked into were categorised as social, psychological and behavioral. There was no statistically significant association found between gender, education of the parents and socioeconomic status. The psychological factors that where looked into were, depression, anxiety and stress. These risk factors were not found to be associated with obesity. There was a significant association between eating a high calorie snack like chicken pakoda, puffs and pastry and being overweight or obese with an OR -2.02 95%CI(1.08-3.79) P value of 0.027. The children who used all other ways to keep in touch with friends had two times increased risk of being overweight or obese compared to the children who physically meet up CI(1.03-3.96) and a p value of <0.05.Children who used any mode of transport to school other than walking were at risk for obesity as compared to those who use other modes of transport with an OR of 1.95 95% CI (1.04-3.67)and a p value <0.05. After adjusting for all the risk factors high calorie food was found to be independently associated with overweight and obesity with an adjusted odds ratio of 2.38, p value of 0.014 and 95% CI (1.189-4.764). CONCLUSION: In this study we concluded that taking a high calorie snack was found to be an independent risk factor for obesity in adolescents.

Item Type: Thesis (Masters)
Uncontrolled Keywords: Social ; psychological ; behavioral ; risk factors ; obesity ; adolescents ; Vellore.
Subjects: MEDICAL > Community Medicine
Depositing User: Punitha K
Date Deposited: 06 May 2018 11:20
Last Modified: 06 May 2018 11:20

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