Table 2 Gender distribution of first live-born offspring, by maternal characteristics and exposure status.
| PCB Exposed | PCB Unexposed | ||||
|---|---|---|---|---|---|
|
Male child N (%) |
Female child N (%) |
Male child N (%) |
Female child N (%) | ||
| 750 (49.8) | 756 (50.2) | 543 (49.9) | 546 (50.1) | ||
| Maternal Education | |||||
| Grade school only | 35 (52.2) | 32 (47.8) | 30 (45.5) | 36 (54.6) | |
| Some high school | 167 (49.1) | 173 (50.9) | 120 (49.2) | 124 (50.8) | |
| High school graduate or GED | 308 (51.3) | 292 (48.7) | 262 (49.6) | 266 (50.4) | |
| Some college or professional training | 163 (45.0) | 199 (55.0) | 104 (51.2) | 99 (48.8) | |
| College degree or higher | 70 (57.4) | 52 (42.6) | 24 (63.2) | 14 (36.8) | |
| Oral contraceptive use in year prior to conception | |||||
| Yes | 76 (54.3) | 64 (45.7) | 14 (53.9) | 12 (46.2) | |
| No | 674 (49.3) | 692 (50.7) | 529 (49.8) | 534 (50.2) | |
| Maternal cigarette consumption prior to conception | |||||
| Yes | 295 (51.0) | 283 (49.0) | 188 (49.9) | 189 (50.1) | |
| No | 455 (49.0) | 473 (51.0) | 355 (49.9) | 357 (50.1) | |
| Maternal race/Ethnicity | |||||
| White, non-Hispanic | 684 (50.0) | 684 (50.0) | 478 (49.4) | 490 (50.6) | |
| Other | 66 (47.8) | 72 (52.2) | 65 (53.7) | 56 (46.3) | |
| Maternal age at conception | |||||
| 18 or younger | 35 (54.7) | 29 (45.3) | 147 (57.9) | 107 (42.1) | |
| 19-24 | 420 (47.7) | 460 (52.3) | 317(46.6) | 363 (53.4) | |
| 25-29 | 189 (52.2) | 173 (47.8) | 65 (59.6) | 44 (40.4) | |
| 30 or older | 106 (53.0) | 94 (47.0) | 14 (30.4) | 32 (69.6) | |
| Maternal BMI at age 20 | |||||
| 15.0 to < 18.5 | 112 (52.1) | 103 (47.9) | 75 (53.6) | 65 (46.4) | |
| 18.5 to < 22.0 | 382 (50.7) | 372 (49.3) | 261 (48.2) | 280 (51.8) | |
| 22.0 to < 25.0 | 135 (44.9) | 166 (55.2) | 100 (46.7) | 114 (53.3) | |
| 25.0 to < 30.0 | 44 (50.0) | 44 (50.0) | 39 (59.1) | 27 (40.9) | |
| 30.0+ | 18 (58.1) | 13 (41.9) | 7 (46.7) | 8 (53.3) | |