| ALL | Baseline age (years) | ||
---|---|---|---|---|
≤30 | 31–35 | ≥36 | ||
(n = 8,652) ** | (n = 17,237) ** | (n = 26,315) ** | ||
Main Effects | Â | Â | Â | Â |
 Lower birth weight at term (per kg) | 1.23 (1.11–1.36) | 1.22 (0.88–1.69) | 1.25 (1.03–1.51) | 1.21 (1.06–1.37) |
 Unhealthy lifestyle (per score) *** | 1.61 (1.51–1.71) | 1.73 (1.41–2.12) | 1.67 (1.48–1.88) | 1.55 (1.43–1.68) |
 Joint effect | 1.95 (1.83–2.07) | 2.13 (1.74–2.52) | 2.05 (1.82–2.28) | 1.86 (1.70–2.01) |
Relative excess risk due to interaction (RERI) | Â | Â | Â | |
 RERI | 0.12 (0.09–0.15) | 0.18 (0.05–0.31) | 0.14 (0.07–0.20) | 0.10 (0.07–0.13) |
  P | <0.0001 | 0.006 | <0.0001 | <0.0001 |
Attributable proportion, % | Â | Â | Â | Â |
 Lower birth weight at term (per kg) | 23.9 (16.6–31.2) | 19.3 (–2.3–40.9) | 23.7 (11.1–36.2) | 24.2 (14.0–34.4) |
 Unhealthy lifestyle | 63.7 (60.4–66.9) | 64.8 (55.6–74.0) | 63.5 (57.8–69.2) | 64.0 (59.6–68.4) |
 Additive interaction | 12.5 (9.9–15.0) | 15.9 (8.9–22.9) | 12.9 (8.6–17.1) | 11.8 (8.0–15.6) |