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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)