Prevalence of obesity, determinants, and its association with hyperglycaemia among community dwelling older adolescents in India.

Background: Globally, obesity and diabetes mellitus (DM) are emergent public health concerns in the adolescent population. India, home to the largest adolescent population and the second largest diabetes cohort is experiencing rapid but unplanned urbanization, with accompanying unhealthy nutritional transition, and sedentary lifestyle.

Aim: To determine prevalence and determinants of obesity and hyperglycaemia and their association among community-dwelling older adolescents (15-19 years) in India.

Methods: This cross-sectional analysis from the national family health survey-5 included data of 258028 adolescents aged 15-19 across India (2019-2021). The survey employed stratified two-stage sampling, with systematic random sampling in rural and urban areas. Statistical analysis included descriptive statistics, bivariate, and multivariable logistic regression, employing generalized linear models.

Results: The weighted prevalence of DM was 1.09% including 0.77% [95% confidence interval (CI): 0.72-0.83] previously diagnosed and 0.32% (95%CI: 0.29-0.35) newly diagnosed cases detected on survey screening. On adjusted analysis, increasing age, higher education levels, higher wealth index, and overweight/obesity were the factors significantly associated with presence of DM. Only 61% of the adolescents with previously diagnosed DM were on anti-diabetes treatment. The weighted prevalence of overweight/obesity among older adolescents was 6.9% with significantly higher odds in the male sex, having higher educational levels, urban residence, and those with a higher wealth index.

Conclusion: Nearly one in hundred older adolescents in India have diabetes, with one in three undiagnosed. Strengthening DM screening and treatment access among adolescents through public health programs is urgently warranted.