Table 1.
Maternal Characteristics in the Complete Case Cohort (n=8999) and Partner Characteristics in the Negative Control Cohort (n=5376) by Categories of Alcohol Intake During Pregnancy
| Characteristic | Alcohol intake | Maternal data (complete case cohort) | No. (%) (unless otherwise specified) | Partner data (negative control cohort) | No. (%) (unless otherwise specified) |
|---|---|---|---|---|---|
| Age at delivery, mean, y (SD) | None | 2415 | 27.7 (4.7) | 141 | 30.0 (6.2) |
| Low to moderate | 4696 | 28.9 (4.4) | 3943 | 30.5 (5.4) | |
| Heavy | 1888 | 28.7 (4.9) | 1292 | 32.0 (5.6) | |
| Body mass index prepregnancy, mean, kg/m2 (SD) | None | 2415 | 23.0 (4.0) | 141 | 24.6 (5.0) |
| Low to moderate | 4696 | 22.7 (3.6) | 3943 | 25.0 (3.8) | |
| Heavy | 1888 | 23.1 (3.6) | 1292 | 24.8 (3.8) | |
| Any smoking prepregnancy | None | 2415 | 705 (29.2) | … | … |
| Low to moderate | 4696 | 1299 (27.7) | … | … | |
| Heavy | 1888 | 874 (46.3) | … | … | |
| Any smoking during pregnancy | None | 2415 | 552 (22.9) | 141 | 45 (31.9) |
| Low to moderate | 4696 | 991 (21.1) | 3943 | 1257 (31.9) | |
| Heavy | 1888 | 753 (39.9) | 1292 | 513 (39.7) | |
|
Multiparous (18 wk gestation) |
None | 2415 | 1280 (53.0) | 141 | 75 (55.3) |
| Low to moderate | 4696 | 2589 (55.1) | 3943 | 2088 (53.0) | |
| Heavy | 1888 | 1124 (59.5) | 1292 | 630 (48.8) | |
|
Black, Asian, and other non‐Caucasian ethnicities (32 wk gestation) |
None | 2415 | 61 (2.5) | 141 | 7 (5.0) |
| Low to moderate | 4696 | 80 (1.7) | 3943 | 61 (1.6) | |
| Heavy | 1888 | 24 (1.3) | 1292 | 17 (1.3) | |
|
University degree (32 wk gestation) |
None | 2415 | 232 (9.6) | 141 | 30 (21.3) |
| Low to moderate | 4696 | 792 (16.9) | 3943 | 792 (20.1) | |
| Heavy | 1888 | 221 (11.7) | 1292 | 409 (31.7) | |
|
Married (8 wk gestation) |
None | 2415 | 1904 (78.8) | 141 | 118 (83.7) |
| Low to moderate | 4696 | 3792 (80.8) | 3943 | 3317 (84.1) | |
| Heavy | 1888 | 1303 (69.0) | 1292 | 1070 (82.8) |