Table 3.

ORs for the relationship between age at menarche and the risk of epithelial ovarian cancer by ovarian cancer type

Age at menarche (y)Adjusted ORs* (95% CI)
All cancers (n = 764)All invasive (n = 630)All borderline (n = 134)Invasive serous (n = 342)Invasive endometrioid (n = 148)Invasive mucinous (n = 48)Borderline serous (n = 61)Borderline mucinous (n = 62)
<121.001.001.001.001.001.001.001.00
121.00 (0.70-1.41)1.05 (0.73-1.52)0.84 (0.42-1.71)1.25 (0.80-1.95)0.80 (0.44-1.45)1.31 (0.45-3.80)0.61 (0.25-1.51)1.34 (0.36-4.95)
131.02 (0.74-1.41)0.94 (0.67-1.33)1.31 (0.72-2.36)1.16 (0.76-1.77)0.66 (0.38-1.16)0.91 (0.32-2.59)0.96 (0.46-2.01)3.18 (1.06-9.56)
≥141.10 (0.81-1.50)1.05 (0.76-1.45)1.34 (0.74-2.43)1.18 (0.80-1.77)0.80 (0.48-1.35)1.85 (0.72-4.74)0.69 (0.31-1.51)3.82 (1.28-11.43)
Ptrend0.440.880.150.620.460.190.610.003
  • * Adjusted for age (in years), weight at age 20 (<50, 50-<55, 55-<60, ≥60), parity (0, 1-2, 3+), ever use of oral contraceptives (yes/no), and height (<160, 160-164, 165-169, 170-174, ≥175 cm).

  • Reference group.