1999–2008 | 2008–2018 | |||||||
---|---|---|---|---|---|---|---|---|
Beta | SE | 95% CI | P-value | Beta | SE | 95% CI | P-value | |
Model 0 | ||||||||
Intercept | 3300 | 0.98 | 3298–3302 | < 0.0001 | 3291 | 1.06 | 3289–3293 | < 0.0001 |
Calendar year (year) | 4.14 | 0.17 | 3.80–4.47 | < 0.0001 | -2.48 | 0.15 | -2.77-(-2.19) | < 0.0001 |
Boy | 136.1 | 0.99 | 134.1–138.0 | < 0.0001 | 140.4 | 0.94 | 138.6-142.3 | < 0.0001 |
Model 1 | ||||||||
Intercept | 3297 | 1.00 | 3295–3299 | < 0.0001 | 3288 | 1.06 | 3286–3290 | < 0.0001 |
Calendar year (year) | 5.41 | 0.16 | 5.10–5.73 | < 0.0001 | -1.42 | 0.14 | -1.68-(-1.15) | < 0.0001 |
Boy | 141.5 | 0.92 | 139.7-143.3 | < 0.0001 | 144.8 | 0.87 | 143.1-146.5 | < 0.0001 |
Week of delivery (week) | 145.0 | 0.89 | 143.3-146.8 | < 0.0001 | 144.8 | 0.85 | 143.2-146.5 | < 0.0001 |
(week of delivery)2 | -19.85 | 0.34 | -20.51-(-19.18) | < 0.0001 | -18.46 | 0.33 | -19.10-(-17.82) | < 0.0001 |
(week of delivery)3 | 1.78 | 0.28 | 1.22–2.33 | < 0.0001 | 2.50 | 0.27 | 1.97–3.04 | < 0.0001 |
Model 2 | ||||||||
Intercept | 3319 | 1.04 | 3317–3321 | < 0.0001 | 3304 | 1.08 | 3301–3306 | < 0.0001 |
Calendar year (year) | 2.36 | 0.16 | 2.05–2.68 | < 0.0001 | -1.81 | 0.14 | -2.08-(-1.55) | < 0.0001 |
Boy | 141.2 | 0.91 | 139.4–143.0 | < 0.0001 | 144.9 | 0.86 | 143.2-146.6 | < 0.0001 |
Week of delivery (week) | 143.3 | 0.42 | 141.6-145.1 | < 0.0001 | 145.3 | 0.83 | 143.7–147.0 | < 0.0001 |
(week of delivery)2 | -18.91 | 0.33 | -19.57-(-18.25) | < 0.0001 | -17.14 | 0.32 | -17.77-(-16.51) | < 0.0001 |
(week of delivery)3 | 1.80 | 0.28 | 1.25–2.34 | < 0.0001 | 1.95 | 0.27 | 1.42–2.48 | < 0.0001 |
Maternal age (year) | 9.41 | 0.09 | 9.30–9.65 | < 0.0001 | 11.64 | 0.07 | 11.50-11.79 | < 0.0001 |
(maternal age)2 | -0.91 | 0.01 | -0.94-(-0.89) | < 0.0001 | -0.71 | 0.01 | -0.73-(-0.69) | < 0.0001 |
Model 3 | ||||||||
Intercept | 3296 | 1.21 | 3294–3298 | < 0.0001 | 3274 | 1.22 | 3271–3276 | < 0.0001 |
Calendar year (year) | 2.62 | 0.16 | 2.30–2.93 | < 0.0001 | -1.82 | 0.14 | -2.09-(-1.56) | < 0.0001 |
Boy | 141.0 | 0.91 | 139.3-142.8 | < 0.0001 | 144.8 | 0.86 | 143.1-146.5 | < 0.0001 |
Week of delivery (week) | 144.2 | 0.88 | 142.5–146.0 | < 0.0001 | 148.0 | 0.84 | 146.4-149.6 | < 0.0001 |
(week of delivery)2 | -18.62 | 0.34 | -19.28-(-17.97) | < 0.0001 | -16.49 | 0.32 | -16.13-(-15.86) | < 0.0001 |
(week of delivery)3 | 1.81 | 0.28 | 1.26–2.36 | < 0.0001 | 1.68 | 0.27 | 1.15–2.21 | < 0.0001 |
Maternal age (year) | 8.30 | 0.09 | 8.12–8.48 | < 0.0001 | 10.43 | 0.08 | 10.28–10.59 | < 0.0001 |
(maternal age)2 | -0.90 | 0.01 | -0.92-(-0.88) | < 0.0001 | -0.71 | 0.01 | -0.73-(-0.69) | < 0.0001 |
Multiparous | 35.97 | 0.96 | 34.09–37.85 | < 0.0001 | 47.81 | 0.90 | 46.04–49.57 | < 0.0001 |
Induced delivery | 0.25 | 1.49 | -2.67-3.17 | NS | 10.52 | 1.27 | 8.04–10.01 | < 0.0001 |
Caesarean section. | 13.99 | 1.25 | 11.54–16.43 | < 0.0001 | 11.57 | 1.08 | 9.45–13.69 | < 0.0001 |