Table 3 Main effects model fitted with preceding birth interval and maternal age (model_3a), preceding birth interval and birth order (model_3b), maternal age and birth order (model_3c) and all together (model_4) with control variables
| Â | Model_3a | Model_3b | Model_3c | Model_4 |
|---|---|---|---|---|
Age at status (event or censor) | ||||
0 | − 1.93 (0.36)*** | − 2.23 (0.34)*** | − 2.51 (0.35)*** | − 1.91 (0.36)*** |
1–5 | − 2.63 (0.36)*** | − 2.94 (0.35)*** | − 3.22 (0.35)*** | − 2.62 (0.36)*** |
6–11 | − 2.81 (0.36)*** | − 3.12 (0.35)*** | − 3.40 (0.35)*** | − 2.80 (0.36)*** |
12–23 | − 2.80 (0.37)*** | − 3.10 (0.35)*** | − 3.38 (0.36)*** | − 2.79 (0.37)*** |
24–59 | − 2.56 (0.37)*** | − 2.87 (0.35)*** | − 3.14 (0.36)*** | − 2.55 (0.37)*** |
Preceding birth intervals | ||||
18–23 | − 0.36 (0.12)** | − 0.36 (0.12)** |  | − 0.36 (0.12)** |
24–35 | − 0.61 (0.10)*** | − 0.61 (0.10)*** |  | − 0.61 (0.10)*** |
36–47 | − 0.84 (0.11)*** | − 0.84 (0.11)*** |  | − 0.83 (0.11)*** |
48 +  | − 0.93 (0.11)*** | − 0.90 (0.11)*** |  | − 0.91 (0.11)*** |
Maternal age | ||||
20–35 | − 0.35 (0.12)** |  | − 0.60 (0.13)*** | − 0.42 (0.13)** |
35 +  | 0.07 (0.13) |  | − 0.36 (0.15)* | − 0.08 (0.16) |
Birth order | ||||
4–6 |  | 0.06 (0.07) | 0.11 (0.08) | 0.09 (0.08) |
7 +  |  | 0.32 (0.08)*** | 0.27 (0.10)** | 0.19 (0.10) ~  |