Table 2 Comparison of age and reproductive factors between breast cancer cases and controls
From: TNRC9 rs12443621 and FGFR2 rs2981582 polymorphisms and breast cancer risk
Cases (%) | Control (%) | P values | χ 2 | |
|---|---|---|---|---|
Age | 51.283 ± 11.29 | 49.91 ± 4.02 | 0.095 | 2.806 |
Age at menarche | 14.53 ± 1.73 | 15.02 ± 1.99 | 0.022 | 5.291 |
Age at menopause | 50.28 ± 4.14 | 49.07 ± 3.56 | 0.134 | 2.291 |
Breast-feeding (months) | 9.03 ± 5.65 | 14.56 ± 11.71 | 0.000 | 34.31 |
No | 25 (23.81) | 50 (13.09) | 0.009 | 6.895 |
Yes | 80 (76.19) | 332 (86.91) | ||
Childbearing | 0.006 | 7.487 | ||
No | 9 (8.57) | 13 (3.40) | ||
Yes | 96 (91.43) | 369 (96.60) | ||
Parity | 0.03 | 6.641 | ||
0 | 9 (8.57) | 1 (0.26) | ||
1–2 | 93 (88.57) | 345 (90.31) | ||
≥3 | 3 (2.86) | 24 (6.28) | ||
Miscarriage/abortion | 0.4 | 0.708 | ||
0 | 34 (32.38) | 112 (29.31) | ||
≥1 | 71 (7.62) | 270 (70.68) | ||
0 | 34 (32.38) | 112 (29.32) | 0.976 | 0.614 |
1–2 | 62 (59.05) | 214 (56.02) | ||
≥3 | 9 (8.57) | 56 (14.66) |