TABLE 2.
Pregnancy outcomes and newborn characteristics among singleton births and first-order multiples, by infertility causes—2000–2006 NASS data linked with state live-birth records from Florida, Massachusetts, and Michigan.
| OD/PCOS (only) | TO (only) | ||||
|---|---|---|---|---|---|
| n | Percent (95% CI) | n | Percent (95% CI) | cORs (95% CI) | |
| Total | 1,433 | 100.0 (8.5% of 16,876) | 3,294 | 100.0 (19.5% of 16,876) | |
| Gestational age | 1.09 (0.98, 1.22) | ||||
| <37 weeks | 455 | 31.8 (29.7, 33.9) | 984 | 29.9 (27.6, 32.3) | |
| ≥37 weeks | 971 | 67.8 (65.8, 69.6) | 2,293 | 69.6 (67.3, 71.8) | |
| Missing/unknowna | 7 | 0.5 | 17 | 0.5 | |
| Birth weight | 1.10 (0.98, 1.24) | ||||
| <2,500 g | 382 | 26.7 (24.3, 29.1) | 818 | 24.8 (23.1, 26.7) | |
| ≥2,500 g | 1,046 | 73.0 (70.6, 75.3) | 2,469 | 75.0 (73.1, 76.7) | |
| Missing/unknowna | 5 | 0.3 | 7 | 0.2 | |
| Composite variable (gestational age and birth weight) | 1.14 (1.00, 1.31) | ||||
| <37 weeks and <2,500 g | 332 | 23.2 (20.9, 25.6) | 679 | 20.6 (18.8, 22.5) | |
| ≥37 weeks and ≥2,500 g | 925 | 64.5 (62.5, 66.6) | 2,163 | 65.7 (63.3, 67.9) | |
| Otherwise | 167 | 11.7 (10.2, 13.3) | 433 | 13.1 (12.0, 14.4) | |
| Missing/unknowna | 9 | 0.6 | 19 | 0.6 | |
| Infant sex | 1.12 (0.99, 1.27) | ||||
| Male | 738 | 51.5 (48.6, 54.4) | 1,790 | 54.3 (52.6, 56.0) | |
| Female | 695 | 48.5 (45.6, 51.4) | 1,504 | 45.7 (44.0, 47.4) | |
| Missing/unknown | 0 | 0 | |||
| Apgar score | 1.86 (1.31, 2.64) | ||||
| <7 | 43 | 3.0 (2.3, 3.9) | 54 | 1.6 (1.2, 2.1) | |
| ≥7 | 1,385 | 96.7 (95.8, 97.3) | 3,232 | 98.1 (97.6, 98.5) | |
| Missing/unknowna | 5 | 0.3 | 8 | 0.2 | |
| NICU admission | 1.19 (0.97, 1.47) | ||||
| Yes | 279 | 19.5 (16.0, 23.5) | 504 | 15.3 (11.7, 19.8) | |
| No | 921 | 64.3 (58.0, 70.1) | 1,985 | 60.3 (49.8, 69.9) | |
| Missing/unknowna | 233 | 16.3 | 805 | 24.4 | |
a
We did not consider it necessary to provide the 95% CI for missing/unknown.