Aboriginal | Non-Aboriginal | |
---|---|---|
Characteristic | OR (95 % CI) | OR (95 % CI) |
Year | 1.04 (1.02, 1.05) | 1.00 (0.99, 1.01) |
Maternal age | ||
Less than 20 years | 0.76 (0.73, 0.96) | 1.00 (0.85, 1.19) |
20 to 24 years | 0.84 (0.73, 0.96) | 1.05 (0.96, 1.16) |
25 to 29 years | 1.00 | 1.00 |
30 to 34 years | 1.12 (0.95, 1.31) | 0.92 (0.85, 1.00) |
35 years and over | 1.05 (0.86, 1.28) | 0.90 (0.85, 1.01) |
Marriage status | ||
Single | 0.78 (0.71, 0.86) | 1.08 (0.99, 1.18) |
Married/defacto | 1.00 | 1.00 |
Other | 1.07 (0.86, 1.33) | 0.97 (0.88, 1.07) |
Parity | ||
First-time mother | 1.19 (1.06, 1.33) | 0.85 (0.80, 0.92) |
1–2 previous births | 1.00 | 1.00 |
≥ 3 previous births | 1.23 (1.09, 1.39) | 1.37 (1.22, 1.54) |
Place of birth | ||
Public hospital | 1.00 | 1.00 |
Private hospital | 3.02 (1.94, 4.67) | 3.12 (2.90, 3.35) |
Other | NAa | 0.01 (0.00, 0.06) |
Residence of mother | ||
Urban | 1.00 | 1.00 |
Remote | 0.98 (0.89, 1.09) | 1.02 (0.92, 1.12) |
Medical and obstetric factorsb | ||
Multiple pregnancy | 1.31 (0.76, 2.23) | 1.36 (0.98, 1.87) |
Early antenatal visit | 1.11 (1.01, 1.22) | 1.15 (1.07, 1.24) |
Previous caesarean section | 0.26 (0.22, 0.30) | 0.14 (0.12, 0.16) |
Smoked during pregnancy | 0.81 (0.74, 0.89) | 1.11 (1.02, 1.22) |
Diabetes in pregnancy | 3.49 (3.04, 4.02) | 2.15 (1.90, 2.45) |
Maternal hypertension | 4.27 (3.50, 5.21) | 6.45 (5.32, 7.83) |
Pre-eclampsia | 10.69 (9.01, 12.68) | 9.78 (8.39, 11.41) |
Antepartum haemorrhage | 1.34 (0.95, 1.91) | 1.28 (1.03, 1.59) |
Malpresentation | 0.17 (0.11, 0.25) | 0.19 (0.15, 0.25) |
Preterm delivery | 0.46 (0.38, 0.56) | 0.32 (0.26, 0.39) |
Late term (≥41 weeks) | 7.35 (6.48, 8.34) | 6.16 (5.66, 6.71) |
Premature rupture of membranes | 2.21 (1.68, 2.90) | 2.65 (1.99, 3.54) |
Prolonged rupture of membranes | 10.83 (9.15, 12.82) | 13.11 (11.20, 15.35) |
Intrauterine growth retardation | 1.22 (1.08, 1.38) | 1.11 (0.99, 1.24) |
Macrosomia | 1.19 (1.01, 1.40) | 1.26 (1.15, 1.39) |