Table 1 Sample Characteristics of Participants in the Linked CENTURY Study, Overall and by Exposure Categories
|  | Total N = 200,258 | No paternal dataa N = 11,989 | Paternal data, not married N = 19,611 | Paternal data, married N = 168,658 |
|---|---|---|---|---|
| Â | N (%) | |||
Maternal Characteristics | Â | Â | Â | Â |
 Age (n = 199,909) |  |  |  |  |
 <35 years | 159250 (79.7) | 11098 (92.8) | 17787 (90.8) | 130365 (77.4) |
 ≥35 years | 40659 (20.3) | 855 (7.2) | 1795 (9.2) | 38009 (22.6) |
Race/ethnicity (n = 197,710) |  |  |  |  |
 White | 9122 (4.6) | 4086 (35.1) | 10927 (56.2) | 136616 (82.0) |
 Black | 151629 (76.7) | 5978 (51.4) | 5154 (26.5) | 12010 (7.2) |
 Hispanic | 23142 (11.7) | 1099 (9.4) | 2405 (12.4) | 5618 (3.4) |
 Other | 13817 (7.0) | 472 (4.1) | 955 (4.9) | 12390 (7.4) |
Nulliparous (n = 181,569) |  |  |  |  |
 No | 96093 (52.9) | 4168 (40.8) | 7310 (39.8) | 84615 (55.3) |
 Yes | 85476 (47.1) | 6038 (59.2) | 11045 (60.2) | 68393 (44.7) |
Education (n = 155,096) |  |  |  |  |
 Less than high school | 2433 (1.2) | 463 (4.0) | 440 (2.3) | 1530 (0.9) |
 High school degree | 67139 (34.0) | 7643 (66.8) | 11299 (58.4) | 48197 (28.9) |
 Some college | 100245 (50.8) | 2984 (26.1) | 7074 (36.6) | 90187 (54.1) |
 College degree and higher | 27671 (14.0) | 351 (3.1) | 529 (2.7) | 26791 (16.1) |
Private Insurance (n = 197,488) |  |  |  |  |
 No | 19076 (12.3) | 3950 (46.9) | 7580 (44.0) | 7546 (5.8) |
 Yes | 136020 (87.7) | 4478 (53.1) | 9636 (56.0) | 121906 (94.2) |
Smoked during pregnancyb (n = 116,697) |  |  |  |  |
 No | 109846 (94.1) | 4071 (83.8) | 11753 (82.6) | 94022 (96.3) |
 Yes | 6851 (5.9) | 785 (16.2) | 2469 (17.4) | 3597 (3.7) |
Gestational diabetesc (n = 83,836) |  |  |  |  |
 No | 80952 (96.6) | 2655 (96.9) | 10711 (96.9) | 67586 (96.5) |
 Yes | 2884 (3.4) | 85 (3.1) | 346 (3.1) | 2453 (3.5) |
Initiated breastfeedingc (n = 154,734) |  |  |  |  |
 No | 36096 (23.3) | 3889 (46.3) | 6377 (37.1) | 25830 (20.0) |
 Yes | 118638 (76.7) | 4513 (53.7) | 10795 (62.9) | 103330 (80.0) |
Child Characteristics | Â | Â | Â | Â |
Sex (n = 200,258) |  |  |  |  |
 Male | 100753 (50.3) | 5946 (49.6) | 9708 (49.5) | 85099 (50.5) |
 Female | 99505 (49.7) | 6043 (50.4) | 9903 (50.5) | 83559 (49.5) |
| Â | Mean (SD) | |||
Birthweight, kg (n = 199,925) | 3.4 (0.5) | 3.2 (0.6) | 3.3 (0.6) | 3.5 (0.5) |
Gestational age at birth, weeks (n = 179,139) | 39.6 (2.1) | 39.4 (2.7) | 39.5 (2.4) | 39.7 (2.0) |
WFL ever ≥95th percentile 0–24 monthsd (n = 104,540) |  |  |  | |
 Male | 100753 (50.3) | 5946 (49.6) | 9708 (49.5) | 85099 (50.5) |
 Female | 99505 (49.7) | 6043 (50.4) | 9903 (50.5) | 83559 (49.5) |
Crossed ≥2 major WFL percentiles 0–24 monthse (n = 25,409) |  |  |  | |
No | 9147 (36.0) | 233 (32.0) | 616 (35.3) | 8298 (36.2) |
Yes | 16262 (64.0) | 494 (68.0) | 1130 (64.7) | 14638 (63.8) |