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Table 1 Comparison of ovarian cancer cases and matched controls

From: Ovarian cancer risk in Polish BRCA1 mutation carriers is not associated with the prohibitin 3' untranslated region polymorphism

Characteristic Cases (n = 83) n (%) Controls (n = 83) n (%)
Year of birth (median) 1953 (range 1928–1971) 1953 (range 1929–1971)
Age of 1st live birth (median) 22 (range 16–38) 23 (range 17–35)
Age at menarche (median) 14 (range 10–17) 14 (range 9–18)
BMI (median) 25 (range 19–38) 25 (range 17–44)
Age (median) 45a (range 25–71) 49b (range 31–73)
Parity   
   0 7 (8) 7 (8)
   1 11 (13) 12 (14)
   2 43 (52) 41 (50)
   3 13 (16) 17 (20)
   4 7 (8) 4 (5)
   >4 2 (3) 2 (3)
Breastfeedingc   
   ≤ 12 months 20 (26) 23 (30)
   >12 months 56 (74) 53 (70)
OC use   
   <5 years 83 (100) 75 (90)
   ≥ 5 years 0 (0) 8 (10)
HRT   
   Never 81 (97) 72 (87)
   Ever 2 (3) 11 (13)
Smokingd   
   <4 pack-years 56 (67) 52 (63)
   ≥ 4 pack-years 24 (29) 31 (37)
BRCA1 mutation   
   5382insC 61 (74) 61 (74)
   300T>G 16 (19) 16 (19)
   4154delA 6 (7) 6 (7)
  1. BMI: body mass index; OC: oral contraceptive; HRT: hormone replacement therapy.
  2. a Age at diagnosis of ovarian cancer.
  3. b Age at the time of matching.
  4. c Nulliparous women were excluded.
  5. d Missing information on smoking status from three cases.