Table 2.
Characteristics of OCWAA study participants by race and case status
| African American | White | |||
|---|---|---|---|---|
| Characteristics, Mean (SD) or N (%)a | Controls (N=1146) |
Cases (N=620) |
Controls (N=6735) |
Cases (N=2800) |
| Age, years | 55.4 (12.9) | 57.1 (10.9) | 64.7 (12.8) | 61.2 (11.8) |
| Education | ||||
| High school graduate/GED or less | 422 (36.9) | 264 (42.6) | 1182 (17.6) | 590 (21.1) |
| Some college | 310 (27.1) | 162 (26.1) | 1922 (28.6) | 752 (26.9) |
| College graduate | 244 (21.3) | 124 (20.0) | 1328 (19.8) | 670 (24.0) |
| Graduate school | 168 (14.7) | 70 (11.3) | 2285 (34.0) | 785 (28.1) |
| Body Mass Index (kg/m2) | ||||
| <25.0 | 264 (23.0) | 118 (19.0) | 3265 (48.5) | 1458 (52.1) |
| 25.0–29.9 | 341 (30.0) | 173 (27.9) | 2039 (30.3) | 744 (26.6) |
| 30.0–34.9 | 254 (22.2) | 157 (25.3) | 892 (13.2) | 371 (13.3) |
| ≥35.0 | 287 (25.0) | 172 (27.7) | 539 (8.0) | 227 (8.1) |
| Tubal Ligation | ||||
| No | 714 (62.4) | 421 (68.1) | 5477 (81.5) | 2371 (84.7) |
| Yes | 430 (37.6) | 197 (31.9) | 1241 (18.5) | 427 (15.3) |
| Duration of oral contraceptive use (months) | 49.7 (68.5) | 40.5 (62.7) | 39.0 (62.4) | 33.1 (54.9) |
| Oral Contraceptive use | ||||
| Never | 340 (29.7) | 226 (36.5) | 3361 (49.9) | 1297 (46.4) |
| Ever | 805 (70.3) | 394 (63.6) | 3372 (50.1) | 1501 (53.3) |
| Hysterectomy | ||||
| No | 907 (79.8) | 465 (75.6) | 5708 (85.9) | 2255 (81.1) |
| Yes | 230 (20.2) | 150 (24.4) | 937 (14.1) | 527 (18.9) |
| Full term pregnancies | 2.4 (1.8) | 2.4 (1.9) | 2.3 (1.7) | 1.9 (1.6) |
| Nulliparity | ||||
| No | 961 (84.0) | 506 (81.6) | 5395 (80.3) | 2098 (75.0) |
| Yes | 183 (16.0) | 114 (18.4) | 1323 (19.7) | 701 (25.0) |
| Patency | ||||
| No | 572 (49.9) | 311 (50.2) | 2112 (31.4) | 903 (32.2) |
| Yes | 574 (50.1) | 309 (49.8) | 4623 (68.6) | 1897 (67.8) |
| Menopausal Status | ||||
| Premenopausal | 392 (34.2) | 170 (27.4) | 1133 (16.8) | 560 (20.0) |
| Postmenopausal | 753 (65.8) | 450 (72.6) | 5595 (83.2) | 2239 (80.0) |
| Family History of Breast Cancer | ||||
| No | 1001 (87.4) | 490 (79.0) | 5786 (85.9) | 2326 (83.1) |
| Yes | 145 (12.6) | 130 (21.0) | 949 (14.1) | 474 (16.9) |
| Family History of Ovarian Cancer | ||||
| No | 1115(97.3) | 581 (93.7) | 6592 (97.9) | 2674 (95.5) |
| Yes | 31 (2.7) | 39 (6.3) | 143 (2.1) | 126 (4.5) |
| Cigarette Smoking | ||||
| Never | 627 (54.8) | 319 (51.5) | 3415 (50.8) | 1414 (50.5) |
| Ever | 518 (45.2) | 301 (48.5) | 3303 (49.2) | 1385 (49.5) |
| Sites | ||||
| AACES | 596 (52.0) | 315 (50.8) | NA | NA |
| CCCS | 80 (7.0) | 44 (7.1) | 421 (6.3) | 233 (8.3) |
| NCOCS | 191(16.7) | 115 (18.6) | 859 (12.8) | 812 (29.0) |
| LACOCS | 145 (12.7) | 127 (20.5) | 1806 (26.8) | 1180 (42.1) |
| WHI | 134 (11.6) | 19 (3.1) | 3649 (54.2) | 575 (20.5) |
| Histotype | ||||
| High grade serous | 402 (65.1) | 1707 (61.5) | ||
| Low grade serous | 22 (3.6) | 91 (3.3) | ||
| Endometrioid | 51 (8.3) | 209 (7.5) | ||
| Clear Cell | 23 (3.7) | 206 (7.4) | ||
| Mucinous | 40 (6.5) | 150 (5.4) | ||
| Others | 80 (12.9) | 411 (14.8) | ||
a
Percentages for each variable category may or may not total to 100% because of rounding.