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Table 3 Neonatal mortality rates by gestational age (GA) and birth weight (BW) among selected high-income countries, 1995–2005

From: Differences in perinatal and infant mortality in high-income countries: artifacts of birth registration or evidence of true differences?

Gestational age/Birth weight Canada USA Denmark Finland Iceland Norway Sweden
Rate Rate Rate Rate Rate Rate Rate
(95 % CI) (95 % CI) (95 % CI) (95 % CI) (95 % CI) (95 % CI) (95 % CI)
GA (weeks) <22 950.5 850.9 875.0 1000.0 0.0 950.5 -a
(938.2–960.9) (847.0–854.6) (768.5–944.5) (540.7–1000.0) (0.0–0.0) (888.2–983.7)  
22–23 892.2 724.1 879.3 794.3 1000.0 739.0 561.2
(877.4–905.8) (720.4–727.7) (821.4–923.7) (726.8–851.6) (857.5–1000.0) (682.5–790.1) (506.2–615.1)
24–25 417.4 311.7 456.8 318.2 340.4 304.8 269.9
(399.0–436.1) (308.6–314.7) (417.6–496.4) (266.5–373.4) (208.6–493.1) (270.0–341.3) (243.3–297.8)
26–27 141.9 118.1 181.8 136.3 131.1 106.7 140.2
(131.2–153.1) (116.3–120.0) (159.7–205.7) (106.8–170.4) (58.4–242.2) (88.6–126.9) (123.7–158.0)
28–31 44.4 36.5 43.8 46.2 34.0 38.1 42.2
(41.1–47.8) (35.9–37.1) (38.3–49.9) (39.5–53.6) (15.6–63.5) (32.7–44.1) (37.5–47.4)
32–36 7.0 5.9 7.9 8.5 7.6 6.9 8.6
(6.6–7.4) (5.9–6.0) (7.0–8.8) (7.4–9.6) (4.4–12.3) (6.0–7.8) (7.8–9.4)
37–41 0.9 0.9 1.3 0.9 0.5 1.0 0.8
(0.9–0.9) (0.9–0.9) (1.2–1.4) (0.8–0.9) (0.3–0.8) (0.9–1.0) (0.7–0.9)
≥42 1.3 1.1 1.6 1.1 0.7 1.1 1.2
(0.9–1.7) (1.0–1.1) (1.3–1.9) (0.7–1.5) (0.1–2.4) (0.8–1.4) (1.0–1.5)
Unknown 32.3 13.0 61.0 67.8 0.0 4.3 33.8
(27.9–37.2) (12.7–13.3) (55.3–67.0) (61.2–74.9) (0.0–18.4) (3.5–5.2) (24.6–45.2)
BW (grams) <500 914.0 838.3 905.1 795.2 833.3 760.8 578.4
(901.9–925.1) (835.4–841.3) (848.3–945.9) (725.7–853.8) (358.8–995.8) (703.6–811.8) (503.7–650.5)
500–749 533.8 420.8 481.1 472.7 633.3 368.6 330.5
(517.7–549.8) (418.1–423.6) (444.6–517.8) (436.5–509.1) (499.0–754.1) (337.0–401.1) (302.2–359.7)
750–999 163.9 118.4 175.2 162.0 150.0 111.1 112.4
(152.9–175.4) (116.7–120.2) (154.5–197.4) (138.7–187.4) (80.0–247.4) (94.0–130.1) (97.7–128.6)
1,000–1,499 53.4 42.4 61.0 51.4 18.6 45.5 52.2
(49.4–57.7) (41.7–43.1) (53.8–68.9) (43.2–60.6) (5.1–46.9) (38.9–52.9) (46.1–59.0)
1,500–1,999 19.7 18.3 22.5 23.8 10.5 16.2 21.5
(18.1–21.5) (18.0–18.6) (19.4–25.9) (20.0–28.1) (2.9–26.7) (13.3–19.5) (18.7–24.7)
≥2000 1.1 1.2 1.3 1.1 0.8 1.1 0.9
(1.1–1.1) (1.1–1.2) (1.3–1.4) (1.0–1.2) (0.5–1.1) (1.0–1.2) (0.9–1.0)
Unknown 36.4 135.4 66.0 12.5 0.0 94.1 55.8
(31.6–41.7) (130.2–140.8) (60.1–72.3) (6.6–21.2) (0.0–521.8) (73.3–118.3) (49.3–62.7)
Total 3.8 4.4 3.5 2.5 2.1 2.6 2.2
(3.7–3.8) (4.4–4.4) (3.3–3.6) (2.4–2.6) (1.7–2.6) (2.5–2.8) (2.1–2.3)
  1. Rates expressed per 1,000 live births. aLive births <22 weeks not recorded in the Swedish Medical Birth Register