Table 2.
Association of breastfeeding with PAM50 tumor subtype*
|
Total
No. |
Luminal A | Luminal B | Basal-like | HER2-E | |||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| % | % | OR | (95% CI) | % | OR | (95% CI) | % | OR | (95% CI) | ||
| Breastfeeding | |||||||||||
| Never | 754 | 42.3 | 44.2 | Ref. | 52.4 | Ref. | 42.2 | Ref. | |||
| Ever | 882 | 57.7 | 55.8 | 1.08 | (0.74 to 1.56) | 47.6 | 0.56 | (0.39 to 0.80) | 57.8 | 0.94 | (0.64 to 1.39) |
* From multinomial logistic regression with comparison group = Luminal A, adjusted for age at diagnosis, race/ethnicity, American Joint Committee on Cancer tumor stage, and parity. CI = confidence interval; OR = odds ratio.