Variables | Crude OR | Adjusted OR 1 | Adjusted OR 2 | Adjusted OR 3 |
---|---|---|---|---|
Antenatal ultrasound scans (frequencies)*& | 1.342 (1.265-1.423) | 1.346 (1.267-1.429) | 1.323 (1.247-1.404) | 1.319 (1.241-1.401) |
Maternal education level (years)* | - | - | - | Â |
Husband education level (years)* | - | 1.058(1.018-1.099) | - | 1.059(1.019-1.101) |
Maternal age (24-31 y as control) | Â | Â | Â | Â |
≤ 23 y | - | 0.790(0.643-0.971) | - | 0.766(0.641-0.943) |
≥ 32 y | - | 1.294(1.049-1.595) | - | 1.441(1.129-1.840) |
Family annual income (≤ 3000 yuan as control) |  |  |  |  |
3001-7499 yuan. | - | 1.225(1.008-1.487) | - | Â |
≥ 7500 yuan | - | 1.294(1.008-1.661) | - |  |
Antenatal care# (No as control) | Â | Â | Â | Â |
Yes | - | - | Â | Â |
Pregnancy complications (No as control) | Â | Â | Â | Â |
Yes | - | - | 1.449(1.177-1.783) | 1.423(1.154-1.754) |
Previous adverse pregnant outcomes (No as control) | Â | Â | Â | Â |
Yes | - | - | 1.584(1.107-2.211) | 1.584(1.117-2.246) |
Primiparity (No as control) | Â | Â | Â | Â |
Yes | - | - | Â | 1.362(1.079-1.718) |