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 | 8.0 (7.9–8.1) | 1.26 (1.24–1.28) | 8.1 (7.7–8.5) | 1.52 (1.45–1.60) |
USA | 9.5 (9.4–9.5) | 1.50 (1.50–1.50) | 9.0 (8.9–9.1) | 1.68 (1.67–1.70) | ||
Denmarka | 7.7 (7.5–7.9) | 1.23 (1.19–1.26) | 8.1 (7.4–8.8) | 1.51 (1.38–1.64) | ||
Finland | 6.3 (6.1–6.5) | 1.00 | 5.3 (4.8–6.0) | 1.00 | ||
Iceland | 6.3 (5.6–7.1) | 1.01 (0.89–1.13) | 6.3 (4.1–9.1) | 1.17 (0.77–1.71) | ||
Norway | 7.4 (7.2–7.6) | 1.17 (1.14–1.21) | 5.6 (5.0–6.2) | 1.05 (0.94–1.17) | ||
Swedena | 5.7 (5.5–5.8) | 0.90 (0.88–0.92) | 4.4 (4.0–4.8) | 0.82 (0.75–0.90) | ||
≥28 | Canada | 4.8 (4.7–4.9) | 0.92 (0.90–0.94) | 4.5 (4.2–4.8) | 1.02 (0.95–1.08) | |
USA | 5.6 (5.6–5.6) | 1.07 (1.07–1.08) | 5.2 (5.1–5.2) | 1.16 (1.14–1.17) | ||
Denmark | 6.6 (6.5–6.8) | 1.27 (1.23–1.30) | 5.7 (5.1–6.3) | 1.27 (1.15–1.41) | ||
Finland | 5.2 (5.1–5.4) | 1.00 | 4.5 (3.9–5.0) | 1.00 | ||
Iceland | 3.8 (3.3–4.4) | 0.73 (0.62–0.84) | 1.9 (0.8–3.7) | 0.42 (0.18–0.83) | ||
Norway | 5.0 (4.9–5.2) | 0.96 (0.93–1.00) | 3.7 (3.2–4.2) | 0.83 (0.72–0.95) | ||
Sweden | 5.0 (4.9–5.1) | 0.96 (0.93–0.98) | 3.9 (3.5–4.3) | 0.88 (0.79–0.97) | ||
BW (grams) | ≥500 | Canada | 7.4 (7.3–7.5) | 1.31 (1.29–1.33) | 7.2 (6.8–7.5) | 1.51 (1.44–1.59) |
USA | 8.3 (8.3–8.4) | 1.48 (1.48–1.49) | 7.8 (7.7–7.9) | 1.65 (1.63–1.67) | ||
Denmark | 7.5 (7.3–7.7) | 1.33 (1.30–1.37) | 7.4 (6.8–8.1) | 1.57 (1.43–1.72) | ||
Finland | 5.6 (5.4–5.8) | 1.00 | 4.7 (4.2–5.3) | 1.00 | ||
Iceland | 5.8 (5.1–6.5) | 1.03 (0.91–1.16) | 4.6 (2.8–7.2) | 0.98 (0.60–1.52) | ||
Norway | 6.4 (6.2–6.6) | 1.14 (1.10–1.17) | 4.8 (4.3–5.4) | 1.01 (0.90–1.14) | ||
Sweden | 5.6 (5.5–5.7) | 0.99 (0.97–1.02) | 4.3 (3.9–4.7) | 0.90 (0.82–0.99) | ||
≥1000 | Canada | 4.9 (4.8–4.9) | 1.22 (1.19–1.24) | 4.3 (4.0–4.6) | 1.24 (1.16–1.33) | |
USA | 5.6 (5.6–5.6) | 1.40 (1.39–1.40) | 5.2 (5.2–5.3) | 1.51 (1.49–1.53) | ||
Denmark | 6.4 (6.2–6.5) | 1.59 (1.55–1.64) | 5.7 (5.2–6.4) | 1.66 (1.49–1.83) | ||
Finland | 4.0 (3.8–4.1) | 1.00 | 3.5 (3.0–4.0) | 1.00 | ||
Iceland | 3.4 (2.9–4.0) | 0.86 (0.73–1.01) | 1.9 (0.8–3.7) | 0.54 (0.23–1.06) | ||
Norway | 4.6 (4.5–4.8) | 1.16 (1.12–1.20) | 3.6 (3.1–4.2) | 1.04 (0.91–1.20) | ||
Sweden | 4.8 (4.7–5.0) | 1.22 (1.18–1.25) | 3.7 (3.4–4.1) | 1.08 (0.97–1.20) | ||
All births | Canada | 9.6 (9.4–9.7) | 1.51 (1.49–1.53) | 10.1 (9.7–10.6) | 1.89 (1.81–1.97) | |
USA | 11.3 (11.3–11.4) | 1.79 (1.78–1.79) | 10.9 (10.8–11.0) | 2.03 (2.01–2.05) | ||
Denmark | 7.8 (7.6–8.0) | 1.23 (1.20–1.26) | 8.1 (7.5–8.9) | 1.52 (1.39–1.65) | ||
Finland | 6.3 (6.1–6.5) | 1.00 | 5.4 (4.8–6.0) | 1.00 | ||
Iceland | 6.4 (5.7–7.2) | 1.01 (0.90–1.13) | 6.3 (4.1–9.1) | 1.17 (0.77–1.70) | ||
Norway | 11.5 (11.3–11.8) | 1.82 (1.78–1.86) | 9.9 (9.1–10.8) | 1.85 (1.70–2.01) | ||
Sweden | 5.7 (5.6–5.9) | 0.90 (0.88–0.93) | 4.4 (4.0–4.8) | 0.81 (0.74–0.89) |