Table 3 Relation of age at menarche to tumor-defined characteristics of breast cancer

≤11

> 11 and ≤13

> 13 and ≤14

1.00 (0.65–1.53)

0.96 (0.74–1.25)

1.01 (0.76–1.33)

1.05 (0.64–1.72)

1.43 (1.06–1.92)

1.32 (0.96–1.81)

2.05 (1.00–4.19)

1.47 (1.00–2.15)

1.74 (1.15–2.62)

2.04 (1.01–4.16)

1.55 (1.06–2.26)

1.45 (1.00–2.19)

1.33 (0.82–2.16)

0.94 (0.68–1.29)

1.15 (0.83–1.61)

0.86 (0.54–1.36)

0.99 (0.75–1.30)

1.24 (0.93–1.66)

1.49 (1.02–2.19)

1.29 (1.02–1.65)

1.22 (0.95–1.58)

1.17 (0.68–2.01)

1.08 (0.76–1.52)

0.99 (0.68–1.43)

0.68 (0.39–1.18)

1.09 (0.81–1.46)

0.92 (0.66–1.26)