Table 1

Sociodemographic characteristics of women according to type of obstetric care

Total
n=30 053
Private patients
n=5479 (%)
Public patients
n=24 574 (%)
OR
(95% CIs)
Maternal age (years)
 <205 (0.1)1063 (4.3)0.13 (0.12 to 0.14)*
 20–29†389 (7.1)10 944 (44.6)
 30–394538 (82.8)11 843 (48.1)10.80 (7.83 to 13.80)*
 >40547 (10.0)724 (2.9)21.30 (16.46 to 26.14)*
Single marital status386 (7.0)10 735 (43.7)0.10 (0.09 to 0.11)*
Socioeconomic group Professional/manager3368 (61.5)4904 (20.0)7.53 (7.23 to 7.86)*
Home duties†422 (7.7)4628 (18.8)
Non-manual1495 (27.3)9505 (38.7)1.73 (1.25 to 2.21)*
Manual129 (2.4)1216 (4.9)1.16 (1.14 to 1.18)*
Unemployed7 (0.1)2898 (11.8)0.03 (0.01 to 0.04)*
Non-classifiable58 (1.1)1423 (5.8)0.45 (0.42 to 0.48)*
Irish nationality5089 (92.9)16 243 (66.1)6.69 (6.02 to 7.44)*
Nulliparous1931 (35.2)10 439 (42.5)0.74 (0.69 to 0.78)*
Unplanned pregnancy452 (8.2)9150 (37.2)0.15 (0.14 to 0.17)*
Gestation at booking (weeks)
 <12†2812 (51.3)8847 (36.0)
 12–202568 (46.9)13 680 (55.7)0.59 (0.57 to 0.61)*
 >2092 (1.7)1872 (7.6)0.16 (0.15 to 0.17)*
Current smoker103 (1.9)4739 (19.3)0.08 (0.07 to 0.10)*
Current alcohol use157 (2.9)1474 (6.0)0.49 (0.38 to 0.82)*
Illicit drug use (ever)67 (1.2)1994 (8.1)0.14 (0.11 to 0.18)*
Social worker referral2 (0.00)961 (3.9)0.01 (0.00 to 0.04)*
  • *p<0.05.

  • †Reference category.