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Table 2 Adjusted odds ratios for obesity and confidence intervals using two methods for the National Health Survey

From: A comparison of two methods for estimating odds ratios: Results from the National Health Survey

Covariates Odds ratio 95% CIa
(Without dichotomizing)
95% CI
(dichotomizing)
Relative length of CI
(dichotomizing/without dichotomizing)
Place of residence 2.04(2.13)b 1.916–2.194 1.915–2.369 1.63
Age 1.03(1.02) 1.026–1.032 1.017–1.026 1.50
Years of education 0.99(0.98) 0.979–0.996 0.968–0.993 1.47
Smoking 0.69(0.65) 0.553–0.856 0.468–0.916 1.48
Marital status 1.24(1.48) 1.150–1.323 1.312–1.668 2.06
Lower-middle economy index 1.36(1.37) 1.246–1.475 1.206–1.554 1.52
Upper-middle economy index 1.31(1.29) 1.205–1.426 1.136–1.468 1.50
High Economy Index 1.29(1.25) 1.155–1.443 1.094–1.425 1.15
  1. aconfidence interval
  2. bwithout dichotomizing(dichotomizing)