Table 2 Trends in maternal population characteristics, NSW 1999–2004
Maternal and pregnancy characteristics | 1999 N = 84934% | 2004 N = 81381 | Change in rate relative to 1999%(95%CI)* |
|---|---|---|---|
Maternal age | Â | Â | Â |
   <20 years | 4.8 | 4.0 | -15.5 (-19.6, -11.4) |
   20–34 years | 78.2 | 76.0 | -2.8 (-3.3, -2.3) |
   ≥ 35 years | 17.0 | 19.9 | +17.0 (+14.8, +19.2) |
Parity | Â | Â | Â |
   0 | 41.2 | 42.5 | + 3.3 (+ 2.2, + 4.5) |
   1–3 | 55.4 | 54.0 | -2.5 (-3.4, -1.6) |
   ≥ 4 | 3.5 | 3.5 | - |
Smoking | 18.9 | 14.8 | -21.9 (-23.8, -20.0) |
Delivery hospital (level) | Â | Â | Â |
   Small rural | 12.1 | 10.2 | -15.6 (-18.1, -13.1) |
   District | 29.4 | 25.8 | -12.3 (-13.8, -10.8) |
   Tertiary obstetric | 40.2 | 39.6 | -1.3 (-2.5, -0.1) |
   Private | 18.3 | 24.4 | +33.0 (+30.8, +35.1) |
Multiple pregnancy | 1.5 | 1.6 | - |
Previous caesarean birth†| 18.3 | 22.6 | +23.7 (+20.9, +26.4) |
Hypertensive disorders | 10.9 | 8.9 | -18.1 (-20.7, -15.5) |
   Preexisting hypertension | 0.6 | 0.6 | +12.3 (+ 8.1, +25.4) |
   Pregnancy Hypertension | 10.3 | 8.2 | -20.2 (-22.9, -17.5) |
Diabetes during pregnancy | 4.3 | 4.9 | +13.9 (+ 9.2, +18.6) |
   Pre-existing diabetes | 0.3 | 0.4 | - |
   Gestational diabetes | 4.0 | 4.6 | +13.5 (+ 8.6, +18.3) |
Antepartum haemorrhage | 1.6 | 1.8 | +11.7 (+ 4.0, +19.3) |
Induction of labour‡ | 26.8 | 28.8 | +7.5 (+ 5.7, + 9.2) |
Mode of delivery | Â | Â | Â |
   Spontaneous vaginal | 69.4 | 62.4 | -10.0 (-10.7, -9.4) |
   Instrumental | 10.9 | 10.3 | -5.8 (-8.5, -3.1) |
   Caesarean section | 19.7 | 27.3 | +38.5 (+36.4, +40.5) |
Postpartum haemorrhage | 6.2 | 6.8 | +10.7 (+ 6.9, +14.6) |