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Table 1 Demographic characteristics of the study population by yes/no ‘G4-cities’ (the four largest cities) with percentages in brackets

From: Design and outline of the Healthy Pregnancy 4 All study

 

G4-cities

NETHERLANDS MINUS G4-CITIES

TOTAL

No. of pregnancies during study period

245445 (100.0)

1338420 (100.0)

1583865 (100.0)

Parity

   

Primiparous

121592 (49.5)

607953 (45.4)

729545 (46.1)

Multiparous

123853 (50.5)

730467 (54.6)

854320 (53.9)

Ethinicity

   

Western

139786 (57.0)

1186772 (88.7)

1326558 (83.8)

Non-Western

105659 (43.0)

151648 (11.3)

257307 (16.2)

Maternal age

   

< 20 years

6987 (2.8)

19861 (1.5)

26848 (1.7)

20-24 years

34864 (14.2)

127013 (9.5)

161877 (10.2)

25-29 years

61354 (25.0)

395138 (29.5)

456492 (28.8)

30-34 years

85444 (34.8)

535927 (40.0)

621371 (39.2)

≥ 35 years

56796 (23.1)

260481 (19.5)

317277 (20.0)

Socioeconomic ‘status score

   

<p20

145367 (59.2)

254607 (19.0)

399974 (25.3)

p20-p80

58641 (23.9)

853074 (63.7)

911715 (57.6)

>p80

41437 (16.9)

230739 (17.2)

272176 (17.2)

Neighbourhood

   

Non-deprived

165658 (67.5)

1320392 (98.7)

1486050 (93.8)

Deprived

79787 (32.5)

18028 (1.3)

97815 (6.2)

Perinatal outcomes**

   

Congenital anomalies

5233 (2.1)

33159 (2.5)

38392 (2.4)

Preterm birth

15673 (6.4)

81646 (6.1)

97319 (6.1)

Small for gestational age

27724 (11.3)

125175 (9.4)

152899 (9.7)

Apgar score <7

3385 (1.4)

14818 (1.1)

18203 (1.1)

(5 minutes after birth)

   

Any Big4**

50267 (20.5)

242697 (18.1)

292964 (18.5)

Fetal mortality

1478 (0.6)

6718 (0.5)

8196 (0.5)

Intrapartum mortality

458 (0.2)

2126 (0.2)

2584 (0.2)

Neonatal mortality††

761 (0.3)

3547 (0.3)

4308 (0.3)

Perinatal mortality

2697 (1.1)

12391 (0.9)

15088 (1.0)

  1. **Individual ‘Big4’ morbidities do not add up to ‘any Big4’.
  2. as women can have >1 ‘Big4’ morbidity.
  3. From 22 weeks of gestational age.
  4. ††0–7 days postpartum.
  5. Total of fetal, intrapartum and neonatal mortality.