Table 4 Perinatal mortality for singleton births (n = 234 719, of which 412 were perinatal deaths) according to LMP and ultrasound-based gestational age and SGA status in Norway, 1999-2006
Gestational age by last menstrual period | ||||||
|---|---|---|---|---|---|---|
Non-SGA | SGA | |||||
Gestational age in weeks | Perinatal deaths n (per 1000) | Unadjusted OR (95% CI) | Adjusted ORα(95% CI) | Perinatal deaths n (per 1000) | Unadjusted OR (95% CI) | Adjusted ORα(95% CI) |
37 | 18 (2.39) | 2.3 (1.4–3.9) | 2.3 (1.3–3.8) | 9 (13.8) | 13.5 (6.7–27.1) | 13.2 (6.5–26.6) |
38 | 42 (1.92) | 1.9 (1.3 –2.7) | 1.8 (1.2–2.7) | 17 (9.9) | 9.6 (5.7–16.5) | 9.5 (5.5–16.2) |
39 | 63 (1.40) | 1.3 (0.95–1.9) | 1.3 (0.95–1.9) | 28 (8.8) | 8.5 (5.5–13.3) | 8.4 (5.4–13.1) |
40 | 67 (1.04) | 1.0 (Ref.) | 1.0 (Ref.) | 12 (3.2) | 3.1 (1.7–5.7) | 3.0 (1.6–5.6) |
41 | 67 (1.3) | 1.3 (0.9–1.8) | 1.3 (0.9–1.8) | 13 (4.8) | 4.6 (2.5–8.3) | 4.5 (2.5–8.3) |
≥42 | 60 (2.0) | 1.9 (1.3–2.7) | 1.9 (1.3–2.7) | 16 (10.5) | 10.2 (5.9–17.6) | 10.1 (5.8–17.6) |
317 | 95 | |||||
Gestational age by ultrasound | ||||||
37 | 37 (4.3) | 3.6 (2.4–5.3) | 3.6 (2.4–5.3) | 14 (22.4) | 19.0 (10.7–33.6) | 18.9 (10.6–33.5) |
38 | 44 (1.6) | 1.3 (0.93–1.9) | 1.3 (0.92–1.9) | 28 (14.6) | 12.2 (7.9–18.8) | 12.0 (7.8–18.5) |
39 | 59 (1.1) | 0.92 (0.7–1.3) | 0.92 (0.7–1.3) | 22 (5.7) | 4.7 (3.0–7.6) | 4.7 (2.9–7.5) |
40 | 82 (1.2) | 1.0 (Ref.) | 1.0 (Ref.) | 15 (3.6) | 3.0 (1.7–5.1) | 2.9 (1.7–5.0) |
41 | 61 (1.3) | 1.1 (0.8–1.5) | 1.1 (0.8–1.5) | 11 (4.9) | 4.1 (2.2–7.7) | 4.0 (2.1–7.4) |
≥42 | 34 (1.8) | 1.5 (1.0–2.2) | 1.5 (0.97–2.2) | 5 (7.0) | 5.8 (2.4–14.4) | 5.5 (2.2–13.7) |
317 | 95 | |||||