From: Very advanced maternal age and morbidity in Victoria, Australia: a population based study
 | 30–34 years | 45+ years |  | ||||
---|---|---|---|---|---|---|---|
 | n | % | n | % | Odds ratio | 95% CI | p-value |
Pre existing Hypertension | 558 | 1.1% | 6 | 2.8% | 2.46 | (0.98, 5.8) | 0.04 |
Pre existing Diabetes | 256 | 0.5% | <5 | 1.4% | 2.66 | (0.7, 8.7) | 0.108 |
Parity | Â | Â | Â | Â | Â | Â | Â |
 Primip | 19247 | 39.4% | 76 | 35.0% |  |  | 0.193 |
 Multip | 29662 | 60.6% | 141 | 65.0% |  |  |  |
Assisted conception | 1346 | 2.8% | 54 | 24.9% | 11.71 | (8.5, 16.2) | <0.001 |