Table 2.

Association between the TGFBR1 alanine microsatellite and breast cancer risk in the Nurses' Health Study

Genotype	Cases (%)	Controls (%)	OR* (95% CI)
9A/9A	968 (80.9)	1352 (80.6)	1.00 (Ref.)
6A/9A	207 (17.3)	302 (18.0)	0.95 (0.76 – 1.17)
6A/6A	12 (1.0)	19 (1.1)	0.80 (0.37 – 1.73)
Other	9 (0.8)	4 (0.2)	---

*Unconditional logistic regression controlled for matching factors, family history of breast cancer, age at menopause, age at menarche, BMI at age 18, weight gain since age 18, age at first birth/parity, and personal history of benign breast disease