. Author manuscript; available in PMC: 2017 Mar 1.

Published in final edited form as: Cancer Causes Control. 2016 Jan 21;27(3):403–414. doi: 10.1007/s10552-016-0716-7

Table 2.

Odds ratios [and 95% confidence intervals] for the association between a history of PCOS and breast cancer incidence, by menopausal status, LIBCSP, 1996–1997.

History of PCOS	Cases (N=1,508)	Controls (N=1,556)	Age-adjusted OR (95% CI)	Multivariable-adjusted OR^a (95% CI)
All women
No PCOS	1,503	1,448	Ref	Ref
PCOS	38	29	1.43 (0.88, 2.34)	1.37 (0.81, 2.29)
Premenopausal women
No PCOS	448	489	Ref	Ref
PCOS	19	9	2.31 (1.03, 5.17)	2.74 (1.13, 6.63)
Postmenopausal women
No PCOS	973	954	Ref	Ref
PCOS	16	19	0.87 (0.44, 1.71)	0.67 (0.33, 1.35)

Adjusted for age and physical activity (hrs/week)