Table 2.

Hazard ratios (95% confidence intervals) of diabetes by different dietary patterns

	Vegetarian	Reverted	Converted	Nonvegetarian
No/person-year	55/5431	6/583	29/3496	93/5456
Crude	0.59 (0.42, 0.82)	0.58 (0.25, 1.32)	0.48 (0.32, 0.73)	1 (Ref)
Model 1	0.54 (0.38, 0.76)	0.60 (0.26, 1.37)	0.45 (0.29, 0.68)	1 (Ref)
Model 2	0.65 (0.46, 0.92)	0.63 (0.27, 1.45)	0.47 (0.30, 0.71)	1 (Ref)

Reverted, diet changed from vegetarian to nonvegetarian. Converted, diet changed from nonvegetarian to vegetarian. Data are hazard ratios (and 95% CI) estimated using Cox regression stratified by follow-up methods and leisure time physical activities. Model 1 adjusted for age, gender, education, leisure time physical activities, family history of diabetes, follow-up methods (health examination or questionnaire only), and lipid medication. Model 2 additionally adjusted for BMI