Table 1.

Antenatal Characteristics of Mothers

Total
n = 705
Singleton Gestations
n = 574
Multiple Gestations
n = 131
PValue (Singletons Versus Multiples)
Maternal age (y)
 Median (number reporting)28.0 (696)28 (567)29 (129)
 [IQR][24–32]24–3225–33.2*
 {Range}{14–44}{14–44}{17–42}
Maternal ethnicity%  (n)%  (n)%  (n)
 White76.7 (541)74.7 (429)85.6 (112).027
 Black (West Indian, African, and other)13.1 (92)14.1 (81)8.4 (11)
 Indian subcontinent6.1 (43)7.1 (41)1.5 (2)
 Other (including Oriental)2.0 (14)1.7 (10)3.1 (4)
 Not known2.1 (15)2.3 (13)1.5 (2)
%  (n/n  Reporting)%  (n/n  Reporting)%  (n/n  Reporting)
Primiparous28.4 (199/700)25.1 (143/570)43.1 (56/130)<.0001
Complications of pregnancy
 Any complication63.2 (442/699)65.4 (372/569)53.9 (70/130).014
 APH28.9 (201/695)30.7 (174/567)21.1 (27/128).031
 PET3.9 (27/695)4.6 (26/567).78 (1/128).04
 Cervical suture8.2 (57/695)9.0 (51/567)4.7 (6/128).10
 PROM24.0 (167/695)24.7 (140/567)21.1 (27/128).39
 Chorioamnionitis17.8 (124/695)18.2 (103/567)16.4 (21/128).64
Antenatal steroids
 Any steroid given64.9 (451/695)64.3 (364/566)67.4 (87/129).50
 24 and 25 wk gestation69.6 (385/553)68.3 (310/454)75.8 (75/99).14
 ≤23 wk gestation46.5 (66/142)48.2 (54/112)40.0 (12/30).42
Steroid >24 h before delivery
 24 and 25 wk gestation60.5 (233/385)60.7 (188/310)60.0 (45/75).92
 ≤23 wk gestation48.5 (32/66)51.9 (28/54)33.3 (4/12).25
Tocolysis22.7 (156/688)21.1 (118/560)29.7 (38/128).04
  • * F test, all other comparisons are χ2.

  • White versus all other ethnic groups.

    APH indicates antepartum hemorrhage; PET, preeclamptic toxaemia.