From: Is maternal trait anxiety a risk factor for late preterm and early term deliveries?
 | Spontaneous deliveriesa | Provider-initiated deliveries | All deliveries | ||||||
---|---|---|---|---|---|---|---|---|---|
Gestational lengthb | Late preterm | Early term | Full term | Late preterm | Early term | Full term | Late preterm | Early term | Full term |
N | 1812 | 9701 | 56 527 | 1 007 | 4535 | 7824 | 2819 | 14054 | 64351 |
Anxiety Groupsc | % | % | % | % | % | % | % | % | % |
 Very high | 2.8 | 2.6 | 2.0 | 4.6 | 3.6 | 2.9 | 3.4 | 2.9 | 2.1 |
 High | 3.5 | 3.1 | 3.1 | 3.4 | 4.1 | 4.1 | 3.4 | 3.4 | 3.2 |
 Low | 36.6 | 33.7 | 32.6 | 38.2 | 37.9 | 35.8 | 37.2 | 35.0 | 33.0 |
 Very low | 57.1 | 60.6 | 62.3 | 53.8 | 54.5 | 57.1 | 55.9 | 58.7 | 61.7 |
Age, y; mean ± SD | 29.6±5.0 | 29.7± 3.6 | 29.9±4.5 | 30.4±5.0 | 31.1±4.8 | 30.8±4.8 | 29.9 ± 5.0 | 30.1±4.7 | 30.1±4.5 |
Body Mass Index; mean ±SD | 24.0±4.4 | 23.6±4.1 | 23.7±4.0 | 24.7±4.9 | 25.0±4.9 | 25.1±4.8 | 24.2 ± 4.6 | 24.1±4.4 | 23.9±4.1 |
Education less than college | 43.6 | 39.8 | 37.4 | 42.2 | 43.1 | 39.7 | 43.1 | 40.9 | 37.7 |
Primiparous | 53.9 | 44.9 | 42.8 | 48.6 | 34.2 | 45.3 | 52.0 | 41.6 | 43.1 |
Gestational diabetes | 0.9 | 0.8 | 0.4 | 1.7 | 2.9 | 2.5 | 1.2 | 1.5 | 0.7 |
Gestational hypertension | 5.7 | 3.9 | 2.7 | 37.9 | 15.9 | 16.4 | 17.2 | 7.6 | 4.3 |
Cesarean section | 4.9 | 6.6 | 9.2 | 55.0 | 60.4 | 41.9 | 25.6 | 23.2 | 9.4 |