From: Impact of aging on obstetric outcomes: defining advanced maternal age in Barcelona
 | n | VLBW < 1500 (aOR 95% CI) | n | LBW < 2500 (aOR 95% CI) |
---|---|---|---|---|
Total (Inc) | Â | 159 (0.6%) | Â | 1311 (5.2%) |
<  30 | 15 | 1 | 129 | 1 |
30–34 | 51 | 0.97 (0.48–1.94) | 475 | 0.98 (0.78–1.22) |
35–39 | 70 | 1.27 (0.64–2.50) | 524 | 1.04 (0.83–1.30) |
40–44 | 20 | 1.24 (0.56–2.78) | 161 | 1.03 (0.78–1.34) |
≥ 45 | 3 | 1.81 (0.45–7.23) | 22 | 1.08 (0.64–1.83) |