Gestational age/Birth weight | 1995–2005 | 2005 | ||||
---|---|---|---|---|---|---|
Rate (95 % CI) | Rate Ratio (95 % CI) | Rate (95 % CI) | Rate Ratio (95 % CI) | |||
GA (weeks) | ≥22 | Canada | 4.8 (4.7–4.9) | 1.27 (1.24–1.29) | 5.0 (4.7–5.3) | 1.55 (1.45–1.64) |
USA | 5.7 (5.7–5.8) | 1.50 (1.49–1.51) | 5.4 (5.4–5.5) | 1.70 (1.68–1.72) | ||
Denmarka | 4.4 (4.2–4.5) | 1.14 (1.10–1.18) | 4.8 (4.3–5.4) | 1.51 (1.35–1.69) | ||
Finland | 3.8 (3.7–4.0) | 1.00 | 3.2 (2.8–3.7) | 1.00 | ||
Iceland | 4.3 (3.7–4.9) | 1.12 (0.97–1.29) | 4.9 (3.0–7.4) | 1.52 (0.94–2.33) | ||
Norway | 5.0 (4.8–5.2) | 1.31 (1.26–1.35) | 3.7 (3.2–4.3) | 1.17 (1.01–1.33) | ||
Swedena | 3.4 (3.3–3.6) | 0.90 (0.87–0.93) | 2.9 (2.6–3.3) | 0.92 (0.81–1.03) | ||
≥28 | Canada | 3.2 (3.1–3.2) | 0.98 (0.96–1.00) | 3.0 (2.7–3.2) | 1.13 (1.05–1.23) | |
USA | 3.8 (3.8–3.8) | 1.17 (1.16–1.18) | 3.5 (3.5–3.6) | 1.34 (1.32–1.36) | ||
Denmark | 4.1 (4.0–4.3) | 1.29 (1.24–1.33) | 3.4 (3.0–3.9) | 1.32 (1.15–1.50) | ||
Finland | 3.2 (3.1–3.4) | 1.00 | 2.6 (2.2–3.1) | 1.00 | ||
Iceland | 2.8 (2.3–3.3) | 0.85 (0.71–1.02) | 1.4 (0.5–3.0) | 0.53 (0.20–1.16) | ||
Norway | 3.5 (3.3–3.6) | 1.07 (1.03–1.12) | 2.5 (2.1–2.9) | 0.95 (0.80–1.12) | ||
Sweden | 3.5 (3.3–3.6) | 1.07 (1.04–1.11) | 2.9 (2.6–3.3) | 1.12 (1.00–1.26) | ||
BW (grams) | ≥500 | Canada | 4.6 (4.5–4.6) | 1.37 (1.34–1.39) | 4.4 (4.1–4.7) | 1.60 (1.49–1.70) |
USA | 5.1 (5.1–5.1) | 1.53 (1.52–1.53) | 4.8 (4.7–4.9) | 1.74 (1.71–1.76) | ||
Denmark | 4.3 (4.1–4.4) | 1.28 (1.23–1.32) | 4.4 (3.9–4.9) | 1.58 (1.40–1.77) | ||
Finland | 3.3 (3.2–3.5) | 1.00 | 2.8 (2.4–3.2) | 1.00 | ||
Iceland | 3.8 (3.2–4.4) | 1.14 (0.98–1.32) | 3.5 (1.9–5.7) | 1.26 (0.70–2.07) | ||
Norway | 4.2 (4.0–4.3) | 1.26 (1.21–1.30) | 3.1 (2.6–3.6) | 1.11 (0.96–1.29) | ||
Sweden | 3.5 (3.4–3.6) | 1.04 (1.01–1.08) | 2.9 (2.6–3.2) | 1.04 (0.92–1.17) | ||
≥1000 | Canada | 3.2 (3.1–3.3) | 1.29 (1.26–1.32) | 2.9 (2.7–3.1) | 1.36 (1.25–1.47) | |
USA | 3.8 (3.8–3.8) | 1.54 (1.53–1.55) | 3.6 (3.6–3.7) | 1.71 (1.68–1.74) | ||
Denmark | 3.9 (3.7–4.0) | 1.57 (1.51–1.62) | 3.5 (3.0–4.0) | 1.65 (1.44–1.88) | ||
Finland | 2.5 (2.4–2.6) | 1.00 | 2.1 (1.8–2.5) | 1.00 | ||
Iceland | 2.5 (2.1–3.0) | 1.01 (0.83–1.21) | 1.4 (0.5–3.0) | 0.66 (0.24–1.44) | ||
Norway | 3.1 (3.0–3.3) | 1.25 (1.20–1.31) | 2.4 (2.0–2.8) | 1.12 (0.94–1.33) | ||
Sweden | 3.2 (3.1–3.4) | 1.31 (1.26–1.35) | 2.7 (2.4–3.1) | 1.28 (1.14–1.44) | ||
All births | Canada | 5.8 (5.7–5.9) | 1.52 (1.49–1.55) | 6.2 (5.9–6.6) | 1.93 (1.83–2.04) | |
USA | 7.0 (6.9–7.0) | 1.81 (1.81–1.82) | 6.7 (6.6–6.8) | 2.08 (2.06–2.11) | ||
Denmark | 4.4 (4.2–4.5) | 1.14 (1.10–1.18) | 4.8 (4.3–5.4) | 1.50 (1.34–1.68) | ||
Finland | 3.8 (3.7–4.0) | 1.00 | 3.2 (2.8–3.7) | 1.00 | ||
Iceland | 4.3 (3.7–4.9) | 1.11 (0.97–1.28) | 4.9 (3.0–7.4) | 1.51 (0.94–2.31) | ||
Norway | 8.9 (8.7–9.1) | 2.32 (2.26–2.38) | 7.9 (7.2–8.6) | 2.45 (2.23–2.69) | ||
Sweden | 3.5 (3.4–3.6) | 0.91 (0.88–0.94) | 2.9 (2.6–3.3) | 0.91 (0.81–1.02) |