Predicted probabilities (95% CIs) of hypohydration by water intake
status and weight status in adults aged ≥20 y in the United States,
2009–2012. n = 9601. Data were generated with the use of
marginal standardization from the log-binomial regression model that included an
interaction between weight status and water intake status (F =
4.78, P = 0.015). BMI (in kg/m2) categories were as
follows: underweight or normal weight, <25; overweight, 25 to <30;
and obese, ≥30. Low water intake (dark gray bars) was defined as follows:
men, <3.7 L; women, <2.7 L; and adequate water intake (light gray
bars) was defined as follows: men, ≥3.7 L; women, ≥2.7 L. Data
source: CDC/National Center for Health Statistics, NHANES (26).