Unadjusted and adjusted odd ratios and risk ratios (RRs) (95%CI) for diabetes by parity.

Note *Basic model: adjusted for education, marital status, passive smoking status, smoking status, alcohol drinking status, family history of DM, physical activity, hypertension, menopause status, ever use of contraceptives, and ever use of hormone replacement therapy.Risk ratios calculated by using the formula (RR = OR/((1−P0)+(P0×OR)), P0: prevalence of diabetes in women with one live birth) to correct the adjusted OR above.Abbreviations: BMI, body mass index.‡Cochran-Armitage test for trend.