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Objective  The aim of this study was to examine the association between whole-day water intake and intra-meal fluid consumption and odds of general and abdominal obesity among adults.    Methods  This cross-sectional study was conducted among 7958 adults in Isfahan, Iran. Daily water consumption was assessed through the use of a pre-tested questionnaire by asking questions about the average number of glasses of water consumed in a day. Intra-meal fluid consumption was also analysed. Data regarding height, weight and waist circumference were collected using a validated self-administered questionnaire. Obesity was defined as body mass index ≥30 kg/m 2 , and abdominal obesity was defined as waist circumference >88 cm for women and >102 cm for men.    Results  After taking potential confounders into account, individuals who were taking more than eight glasses of water in a day had 78% greater odds of general obesity (OR: 1.78; 95% CI: 1.08–2.94) compared with those who were taking less than two glasses of water. Individuals with much water intake had no significant greater odds of abdominal obesity. Compared with those who were consuming less than a glass of intra-meal fluids, subjects with 1–2 glasses of fluids between meals had 34% greater odds of general obesity (OR: 1.34; 95% CI: 1.04–1.59). Although subjects with greater intra-meal fluid intake had greater odds of abdominal obesity in crude model, this association became non-significant after adjustment for potential confounders (comparing > 4 glasses vs. ≤1 glass: OR: 1.65; 95% CI: 0.81–3.34).    Conclusions  We observed that taking more than eight glasses of water in a day and consuming 1–2 glasses of fluids between meals was associated with greater odds of general obesity.

Water intake and intra-meal fluid consumption in relation to general and abdominal obesity of Iranian adults