TABLE 1.

Age-adjusted odds ratios (OR) and 95% confidence intervals (CI) for the association between body mass index (BMI) and postmenopausal breast cancer risk, Long Island Breast Cancer Study Project (1996–1997).

BMIc	Caa/Cob	OR	95% CI
<25kg/m2	386/439	1.00	Reference
25–29.9kg/m2	340/309	1.24	(1.00–1.52)
≥30kg/m2	264/222	1.36	(1.09–1.71)

^aCases;

^bControls;

^c1-year prior to reference date