Table 3.

Comparison of ovarian cancer cases and matched controls

CharacteristicCases (N = 83)
Controls (N = 83)
n (%)n (%)
Year of birth (median)1953 (range 1928-1971)1953 (range 1929-1971)
Age of first live birth (median)22 (range 16-38)23 (range 17-35)
    07 (8)7 (8)
    ≤2459 (71)51 (62)
    >2417 (21)25 (30)
Age at menarche (median, y)14 (range 10-17)14 (range 9-18)
    ≤1110 (12)4 (5)
    12-1324 (29)28 (34)
    ≥1449 (59)51 (61)
BMI (median)25 (range 19-38)25 (range 17-44)
Parity
    07 (8)7 (8)
    111 (13)12 (14)
    243 (52)41 (50)
    313 (16)17 (20)
    47 (8)4 (5)
    >42 (3)2 (3)
Breast-feeding (mo)*
    ≤1220 (26)23 (30)
    >1256 (74)53 (70)
OC use (y)
    <583 (100)75 (90)
    ≥50 (0)8 (10)
HRT
    Never81 (97)72 (87)
    Ever2 (3)11 (13)
Smoking (pack-years)
    <456 (67)52 (63)
    ≥424 (29)31 (37)
  • * Nulliparous women were excluded.

  • Missing information on smoking status from three cases.