Table 4.

Odds ratios (95% confidence interval) of having diabetes in several different models derived from a multiple logistic regression analysis using coffee consumption as independent variables, adjusted for potential confounders

Variable	Model 1	Model 2	Model 3	Model 4
Coffee(0 time/wk)	1.00(reference)	1.00(reference)	1.00(reference)	1.00(reference)
Coffee(< 1 time/wk)	0.53(0.37–0.76)c	0.70(0.48–1.03)	0.77(0.53–1.13)	0.77(0.52–1.13)
Coffee(1–6 times/wk)	0.39(0.25–0.62)c	0.48(0.30–0.78)b	0.49(0.30–0.80)b	0.46(0.28–0.76)b
Coffee(≥ 7times/wk)	0.29(0.14–0.64)b	0.37(0.17–0.82)a	0.36(0.16–0.80)a	0.37(0.16–0.83)a

Model 1: unadjusted

Model 2: adjusted for age, gender, BMI, systolic BP, and diastolic BP

Model 3: adjusted for model 2 variables, plus smoking, alcohol drinking, betel nut chewing, physical activity, income, and educational level

Model 4: adjusted for model 3 variables, plus fat %, protein %, carbohydrate %, and magnesium

^ap < 0.05

^bp < 0.01

^cp < 0.001