HN-00450063_Association of High caffeine Drinks Consumption and Body Mass Index

Introduction: To assess the relation of body weight and body mass index (BMI) with green and black tea and caffeine consumption Methods: In this cross-section study, a total of 60 females aged 19-46 years were enrolled. Green and black tea consumption was assessed using food frequency questionnaire. Caffeine intake was estimated from a 24-h recall. Anthropometric variables were measured using standard protocol. Overweight or obesity was defined as having BMI≥25 kg/m2. Results: In age- and energy-adjusted model, participants who were green or black tea consumers had lower BMI than non-consumers (green tea: 21.2±1.0 vs. 24.2±0.6 kg/m2 (P=0.02), and black tea: 22.3±0.7 vs. 24.5±0.7 kg/m2 (P=0.04)). Similar association was observed for caffeine (20.4±0.5 vs. 26.7±0.5 kg/m2 (P<0.0001). Green tea consumers had 87% lower risk for overweight (95% CI: 0.02, 0.75; P=0.023). Consuming higher caffeine was associated with 97% lower risk (95% CI: 0.005, 0.142; P=0.028). After adjusting for confounders, black tea was not related to the risk of overweight (OR=0.30, 95% CI: 0.09, 1.06; P=0.061). Conclusion: Green tea and caffeine are inversely associated with body weight and BMI, whilst black tea-BMI relation is affected by other factors. Future prospective studies are needed to confirm our results.