Table 2.
Characteristics of cases and controls included in the pooled analysis*
| Controls (N=9,859) | Cases (N=8,525) | |
|---|---|---|
| Mean (std) or N (%) | Mean (std) or N (%) | |
| Age | 55 (12) | 55 (12) |
| OC use | ||
| Never | 2995 (30) | 3411 (40) |
| Ever | 6864 (70) | 5114 (60) |
| Parous | ||
| No | 1468 (15) | 2196 (26) |
| Yes | 8391 (85) | 6329 (74) |
| Tubal Ligation | ||
| No | 7359 (75) | 6994 (82) |
| Yes | 2500 (25) | 1531 (18) |
| Body Mass Index | 26.5 (6.1) | 27.0 (6.6) |
| Race/Ethnicity | ||
| Non-Hispanic White | 8629 (88) | 7433 (87) |
| Hispanic White | 197 (2) | 214 (3) |
| Black | 273 (3) | 268 (3) |
| Asian | 350 (4) | 313 (4) |
| Other † | 407 (4) | 291 (4) |
| Powder use ‡ | ||
| Never use | 5815 (59) | 4643 (54) |
| Non-genital use only | 1533 (16) | 1282 (15) |
| Genital use | 2511 (25) | 2600 (31) |
*
All characteristics listed except age differed significantly (<0.01) between cases and controls. Cases include both borderline and invasive ovarian cancers.
†
There are six cases and three controls missing race/ethnicity information.
‡
Categories for non-genital and genital powder use are mutually exclusive.