Table 3.
Epidemiologic risk factors, by casea status and race
| AA cases (n=1052) n (%) |
AA controls (n=2328) n (%) |
White cases (n=2380) n (%) |
White controls (n=3982) n (%) |
pcontrolsb | |
|---|---|---|---|---|---|
| Age (y) (M (SD)) | 58.2 (11.5) | 57.9 (13.3) | 59.0 (11.2) | 58.9 (12.8) | <.01 |
| No. missing | 0 | 1 | 0 | 0 | |
| BMI ≥30 kg/m2 | 563 (54) | 1042 (45) | 504 (21) | 734 (19) | <.01 |
| No. missing | 8 | 34 | 22 | 26 | |
| College degree | 343 (33) | 821 (35) | 1224 (51) | 2216 (56) | <.01 |
| No. missing | 2 | 14 | 1 | 14 | |
| Family history of ovarian cancer | 60 (6) | 69 (3) | 120 (5) | 121 (3) | 0.94 |
| No. missing | 93 | 127 | 48 | 78 | |
| Menarche age <11 years | 107 (10) | 228 (10) | 172 (7) | 257 (6) | <.01 |
| No. missing | 9 | 20 | 6 | 12 | |
| Duration of oral contraceptive use | |||||
| Never used | 396 (38) | 861 (38) | 989 (42) | 1496 (38) | 0.52 |
| <5 yearsc | 376 (36) | 757 (33) | 833 (36) | 1258 (32) | |
| 5+ years | 261 (25) | 659 (29) | 519 (22) | 1182 (30) | |
| No. missing | 19 | 51 | 39 | 46 | |
| Full-term pregnancies | |||||
| None | 197 (19) | 354 (15) | 618 (26) | 802 (20) | <.01 |
| 1 | 186 (18) | 459 (20) | 342 (14) | 577 (15) | |
| 2 | 227 (22) | 571 (25) | 716 (30) | 1227 (31) | |
| 3 | 214 (20) | 417 (18) | 410 (17) | 752 (19) | |
| 4+ | 225 (21) | 518 (22) | 293 (12) | 614 (15) | |
| No. missing | 3 | 9 | 1 | 10 | |
| Ever breastfedd,e | 284 (39) | 677 (46) | 775 (47) | 1422 (59) | <.01 |
| No. missing | 48 | 28 | 1 | 2 | |
| Tubal ligation | 304 (29) | 699 (30) | 353 (15) | 708 (18) | <.01 |
| No. missing | 5 | 7 | 5 | 11 | |
| Ever used menopausal hormonesf | 207 (27) | 478 (31) | 991 (55) | 1509 (52) | <.01 |
| No. missing | 8 | 54 | 7 | 24 | |
Table does not include data from SCCS or WHI; these studies were added to the consortium recently, and their risk factor data have not yet been fully harmonized.
a
Invasive only
b
Testing for the difference between African American and white controls
c
Includes participants who used oral contraceptives for <1 year
d
Among parous women
e
Not collected by MEC
f
Among women older than 50