Table 1

Selected factors among cases of epithelial ovarian cancer, cancer controls, and noncancer controls (%)

Cases (780)Cancer controls (2053)Noncancer controls (2570)
Age (yr)
<40192020
40–49252538
50–59292821
60–79272722
Parity
0271923
1–2423735
3+293839
Oral contraceptive use (yr)
0716567
1–4202221
5+71110
Hysterectomy111715
Age at menopausea
<45243540
45–49302926
50+463634
Mother or sister with ovarian cancer2<1<1
  • a Among postmenopausal women.