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Table 3 Obstetrical outcomes of the 3763 study participants (descriptive statistics)

From: Evaluation of the vaginal flora in pregnant women receiving opioid maintenance therapy: a matched case-control study

Variable

OMT group

Control group

Total

N (%)

N (%)

N (%)

Pregnancy outcome

Live birth

131/132 (99.2)

3614/3631 (99.5)

3745/3763 (99.5)

Stillbirth

1/132 (0.8)

17/3631 (0.5)

18/3763 (0.5)

Prematurity

Preterm delivery

19/132 (14.4)

365/3631 (10)

384/3763 (10.2)

No preterm delivery

113/132 (85.6)

3266/3631 (90)

3379/3763 (89.8)

Mode of delivery

Vaginal deliverya

68/132 (51.5)

1939/3631 (53.4)

2007/3763 (53.3)

Caesarean section

53/132 (40.2)

1510/3631 (41.6)

1563/3763 (41.5)

Instrumental delivery

11/132 (8.3)

182/3631 (5)

193/3763 (5.1)

Gestational week at delivery

<23w 0d

0/132 (0)

30/3631 (0.8)

30/3763 (0.8)

23w 0d–27w 6d

2/132 (1.5)

38/3631 (1)

40/3763 (1.1)

28w 0d–31w 6d

2/132 (1.5)

37/3631 (1)

39/3763 (1)

32w 0d–36w 6d

15/132 (11.4)

260/3631 (7.2)

275/3763 (7.3)

≥37w 0d

113/132 (85.6)

3266/3631 (90)

3379/3763 (89.8)

Birth weightb

<500 g

0/132 (0)

21/3631 (0.6)

21/3763 (0.6)

500–999 g

2/132 (1.5)

44/3631 (1.2)

46/3763 (1.2)

1000–1499 g

0/132 (0)

30/3631 (0.8)

30/3763 (0.8)

1500–2499 g

18/132 (13.6)

215/3631 (5.9)

233/3763 (6.2)

≥2500 g

112/132 (84.9)

3317/3631 (91.4)

3429/3763 (91.1)

  1. N number
  2. aincl. vaginal breech delivery
  3. bno birth weight available for 4 infants (0.1 %) of the control group