Table 2.
Hair product use characteristics among of breast cancer cases, overall and by race, N = 2,998
| Overall (N = 2,998) | Black (n = 2,227) | White (n = 771) | |
|---|---|---|---|
|
| |||
| Hair product use characteristics | n (%) | n (%) | n (%) |
|
| |||
| Regular hair dye use | |||
| No | 1,723 (57.7) | 1,431 (64.5) | 292 (37.9) |
| Yes | 1,265 (42.3) | 787 (35.5) | 478 (62.1) |
| Duration of hair dye use | |||
| Non-user | 1723 (57.6) | 1431 (64.5) | 292 (37.9) |
| ≤10 years of use | 764 (25.6) | 531 (23.9) | 233 (30.3) |
| >10 years of use | 501 (16.8) | 256 (11.6) | 245 (31.8) |
| Typical shade of hair dye used | |||
| Non-user | 1,723 (59.8) | 1,431 (67.8) | 292 (40.0) |
| Light (blonde, light brown) | 362 (12.6) | 182 (8.6) | 180 (23.4) |
| Medium (medium brown, red) | 378 (13.1) | 180 (8.5) | 198 (25.7) |
| Dark (dark brown, black) | 419 (14.5) | 320 (15.1) | 99 (12.9) |
| Typical application of hair dyes | |||
| Non-user | 1,723 (60.2) | 1,431 (67.7) | 292 (38.9) |
| Salon | 355 (12.4) | 162 (7.7) | 193 (25.7) |
| Home kit | 434 (15.2) | 282 (13.3) | 152 (20.2) |
| Combination | 351 (12.2) | 238 (11.3) | 113 (15.2) |
| Regular relaxer use | |||
| No | 943 (31.9) | 263 (11.9) | 680 (92.3) |
| Yes | 2,011 (68.1) | 1954 (88.1) | 57 (7.7) |
| Duration of relaxer use | |||
| Non-user | 943 (31.9) | 263 (11.9) | 680 (92.3) |
| ≤10 years of use | 1851 (62.7) | 1797 (81.0) | 54 (7.3) |
| >10 years of use | 160 (5.4) | 157 (7.1) | 3 (0.4) |
| Early relaxer use | |||
| Non-user | 943 (34.8) | 263 (13.3) | 680 (92.2) |
| User – did not use before age 12 | 1,585 (58.4) | 1,536 (77.7) | 49 (6.6) |
| User – used before age 12 | 185 (6.8) | 177 (9.0) | 8 (1.2) |
| Typical application of relaxers | |||
| Non-user | 943 (48.9) | 263 (21.5) | 680 (96.2) |
| Salon | 285 (14.8) | 271 (22.2) | 14 (2.0) |
| Home kit | 246 (12.8) | 236 (19.3) | 10 (1.4) |
| Combination | 454 (23.5) | 451 (37.0) | 3 (0.4) |
| Joint use of hair dyes and relaxers | |||
| Non-user of both hair dyes and relaxers | 444 (15.1) | 187 (8.5) | 257 (34.9) |
| User of hair dyes only | 496 (16.8) | 74 (3.4) | 422 (57.3) |
| User of relaxers only | 1,250 (42.4) | 1,236 (55.9) | 14 (1.9) |
| User of both hair dyes and relaxers | 755 (25.6) | 712 (32.2) | 43 (5.84) |