Table 4: Adjusted , for obesity and confidence intervals using two methods for the National Health Survey.

Covariates ( ) 95% CIa (proposed) 95% CI (dichotomized)Relativeb length of CI

Place of residence1.65 (1.97)c 1.58–1.741.79–2.18 2.43
Age1.021 (1.019) 1.018–1.0221.015–1.022 1.75
Years of education0.99 (0.98)0.985–0.9970.971–0.9941.92
Smoking0.76 (0.68)0.66–0.900.51–0.921.71
Marital status1.16 (1.42)1.10–1.221.27–1.582.58
Lower-middle economy index 1.24 (1.32)1.14–1.321.18–1.481.67
Upper-middle economy index1.21 (1.26)1.14–1.291.12–1.422.0
High economy index1.20 (1.21) 1.11–1.30 1.08–1.36 1.47

aconfidence interval, bdichotomized/proposed, cproposed (dichotomized).