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Table 1 Characteristics of mothers with late preterm, early term and full term deliveries by delivery onset

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
  1. aSpontaneous deliveries (SD) = delivery onset by spontaneous labor or spontaneous rupture of the membranes
  2. bLate preterm: weeks 34-36; early term: weeks 37-38; full term: weeks 39-41
  3. cCut-points at mean and ± 2 standard deviations. ‘Very low’ = 1.0-1.25; ‘low to mean = 1.26-1.95; ‘mean to high’ = 1.96-2.30; ‘high’ =  2.31-4.00