Table 3.

Trends in age-standardized prevalence (95% confidence intervals) of overweight (includes obesity), obesity, and underweight

Data were from 1998, 2001, 2005, and 2007 Korea National Health and Nutrition Examination Survey (K-NHANES) (10,043 men and 12,758 women aged 20+). The 2005 Korean Census population was used as the standard population and sample weights from the K-NHANES were considered in the direct standardization. Logistic regression analyses were employed to test time trends of the age-adjusted prevalences, after taking account of primary sampling units, stratification, and sample weights from the K-NHANES.