Table 3 Perinatal mortality for singleton births in Norway 1967–2006 (n = 1 855 682) according to LMP-based gestational age and size at birth (small-for-gestational-age [SGA] and non-SGA)
Non-SGA | SGA | ||||||
|---|---|---|---|---|---|---|---|
Gestational age in weeks | Perinatal deaths n (per 1000) | Adjusted ORα | 95% CI | Perinatal deaths n (per 1000) | SGA% of deaths per week | Adjusted ORα | 95% CI |
37 | 460 (7.3) | 4.2 | 3.8–4.8 | 418 (55.2) | 47.6 | 32.5 | 28.8–36.6 |
38 | 520 (3.4) | 2.0 | 1.8–2.2 | 424 (23.3) | 44.9 | 13.3 | 11.9–15.0 |
39 | 719 (2.1) | 1.2 | 1.1–1.4 | 472 (12.0) | 39.6 | 6.7 | 6.0–7.5 |
40 | 846 (1.7) | 1.0 | Reference | 416 (7.6) | 33.0 | 4.1 | 3.7–4.6 |
41 | 741 (1.9) | 1.1 | 1.02–1.2 | 352 (8.5) | 32.3 | 4.6 | 4.1–5.2 |
≥42 | 648 (2.8) | 1.7 | 1.5–1.8 | 292 (11.3) | 31.1 | 6.1 | 5.3–7.0 |