Table 3 Delivery complications and fetal/neonatal outcomes in women with and without oligohydramnios

 Obstructed labor, n/N (%)

5/87 (5.7)

531/12,852 (4.1)

536/12,939 (4.1)

0.84 (0.36, 1.93)

 Hemorrhage, n/N (%)

5/87 (5.7)

212/12,666 (1.7)

217/12,753 (1.7)

2.94 (1.31, 6.61)

 Hypertensive disorder^d, n/N (%)

4/87 (4.6)

277/12,851 (2.2)

281/12,938 (2.2)

–

 Fetal malposition, n/N (%)

5/87 (5.7)

243/12,852 (1.9)

248/12,939 (1.9)

2.44 (1.07, 5.59)

 C-section delivery, n/N (%)

25/87 (28.7)

1736/12,851 (13.5)

1761/12,938 (13.6)

2.07 (1.41, 3.03)

 Maternal death < 42 days^d, n/N (rate/100,000 deliveries)

0/87 (0)

12/12,800 (94)

12/12,887 (93)

–

 Maternal sepsis, n/N (%)

1/87 (1.1)

134/12,720 (1.1)

135/12,807 (1.1)

0.82 (0.19, 3.57)

 Stillbirth, n/N (rate/1000)

7/87 (80.5)

192/12,852 (14.9)

199/12,939 (15.4)

5.16 (2.07, 12.85)

 Male, n/N (%)

43/86 (50.0)

6578/12,849 (51.2)

6621/12,935 (51.2)

0.99 (0.69, 1.41)

 Low birth weight, n/N (%)

26/87 (29.9)

1507/12,849 (11.7)

1533/12,936 (11.9)

2.10 (1.44, 3.07)

 Multiple gestation, n/N (%)

2/87 (2.3)

76/12,851 (0.6)

78/12,938 (0.6)

1.93 (0.26, 14.37)

 Congenital anomaly^d, n/N (%)

2/77 (2.6)

18/12,513 (0.1)

20/12,590 (0.2)

–

 Birth weight, Mean (sd)

2710 (595)

2971 (441)

2969 (443)

−162.3 (−288.6, −35.9)

 GA at delivery, Mean (sd)

37.7 (2.9)

38.6 (2.0)

38.6 (2.0)

−0.53 (−1.07, 0.00)

 Preterm Birth, n/N (%)

27/85 (31.8)

1438/12,566 (11.4)

1465/12,651 (11.6)

2.73 (1.76, 4.23)

 Neonatal death < 28 days, n/N (rate/1000)

6/80 (75.0)

211/12,613 (16.7)

217/12,693 (17.1)

3.18 (1.18, 8.57)