|
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
|
9.5 (9.4–9.7)
|
1.30 (1.29–1.32)
|
9.5 (9.0–9.9)
|
1.52 (1.46–1.59)
|
|
USA
|
11.8 (11.8–11.8)
|
1.61 (1.61–1.62)
|
11.2 (11.1–11.3)
|
1.81 (1.79–1.83)
|
|
Denmarka
|
8.9 (8.7–9.1)
|
1.22 (1.19–1.25)
|
9.1 (8.3–9.8)
|
1.45 (1.34–1.58)
|
|
Finland
|
7.3 (7.1–7.5)
|
1.00
|
6.2 (5.6–6.9)
|
1.00
|
|
Norway
|
8.5 (8.3–8.7)
|
1.16 (1.13–1.19)
|
6.3 (5.6–7.0)
|
1.01 (0.91–1.12)
|
|
Swedena
|
6.8 (6.6–6.9)
|
0.93 (0.91–0.95)
|
5.4 (5.0–5.9)
|
0.87 (0.80–0.95)
|
|
≥28
|
Canada
|
6.3 (6.2–6.4)
|
1.01 (0.99–1.02)
|
5.7 (5.4–6.1)
|
1.09 (1.03–1.15)
|
|
USA
|
7.7 (7.7–7.7)
|
1.24 (1.23–1.24)
|
7.1 (7.0–7.2)
|
1.35 (1.33–1.36)
|
|
Denmark
|
7.8 (7.6–8.0)
|
1.25 (1.22–1.28)
|
6.6 (5.9–7.2)
|
1.24 (1.12–1.36)
|
|
Finland
|
6.2 (6.0–6.4)
|
1.00
|
5.3 (4.7–5.9)
|
1.00
|
|
Norway
|
6.0 (5.8–6.2)
|
0.97 (0.94–1.00)
|
4.3 (3.8–4.9)
|
0.81 (0.71–0.92)
|
|
Sweden
|
6.0 (5.9–6.2)
|
0.97 (0.94–0.99)
|
4.8 (4.4–5.3)
|
0.91 (0.83–0.99)
|
|
BW (grams)
|
≥500
|
Canada
|
8.9 (8.8–9.1)
|
1.34 (1.33–1.37)
|
8.5 (8.1–8.9)
|
1.52 (1.45–1.59)
|
|
USA
|
10.6 (10.6–10.7)
|
1.61 (1.60–1.61)
|
10.1 (10.0–10.2)
|
1.79 (1.78–1.81)
|
|
Denmark
|
8.7 (8.5–8.9)
|
1.31 (1.28–1.34)
|
8.4 (7.7–9.2)
|
1.50 (1.38–1.63)
|
|
Finland
|
6.6 (6.4–6.8)
|
1.00
|
5.6 (5.0–6.3)
|
1.00
|
|
Norway
|
7.5 (7.3–7.7)
|
1.13 (1.10–1.17)
|
5.5 (4.9–6.1)
|
0.98 (0.87–1.09)
|
|
Sweden
|
6.7 (6.5–6.8)
|
1.01 (1.00–1.05)
|
5.3 (4.9–5.8)
|
0.95 (0.87–1.03)
|
|
≥1000
|
Canada
|
6.3 (6.2–6.4)
|
1.27 (1.26–1.30)
|
5.5 (5.2–5.8)
|
1.29 (1.21–1.36)
|
|
USA
|
7.6 (7.6–7.6)
|
1.55 (1.54–1.55)
|
7.2 (7.1–7.2)
|
1.68 (1.66–1.70)
|
|
Denmark
|
7.5 (7.3–7.7)
|
1.52 (1.48–1.56)
|
6.6 (6.0–7.3)
|
1.56 (1.42–1.71)
|
|
Finland
|
4.9 (4.8–5.1)
|
1.00
|
4.3 (3.7–4.8)
|
1.00
|
|
Norway
|
5.7 (5.5–5.8)
|
1.14 (1.11–1.18)
|
4.2 (3.7–4.8)
|
0.99 (0.87–1.13)
|
|
Sweden
|
5.8 (5.7–6.0)
|
1.19 (1.16–1.22)
|
4.6 (4.2–5.1)
|
1.09 (0.99–1.19)
|
|
All births
|
Canada
|
11.1 (11.0–11.3)
|
1.51 (1.49–1.53)
|
11.5 (11.0–11.9)
|
1.84 (1.77–1.92)
|
|
USA
|
13.7 (13.6–13.7)
|
1.86 (1.85–1.86)
|
13.2 (13.1–13.3)
|
2.12 (2.10–2.13)
|
|
Denmark
|
9.0 (8.8–9.2)
|
1.22 (1.19–1.25)
|
9.1 (8.4–9.9)
|
1.46 (1.35–1.59)
|
|
Finland
|
7.4 (7.2–7.6)
|
1.00
|
6.2 (5.6–6.9)
|
1.00
|
|
Norway
|
12.7 (12.4–12.9)
|
1.72 (1.68–1.76)
|
10.6 (9.8–11.5)
|
1.71 (1.57–1.85)
|
|
Sweden
|
6.8 (6.7–7.0)
|
0.93 (0.90–0.95)
|
5.4 (5.0–5.9)
|
0.87 (0.80–0.95)
|
- Rates are expressed per 1,000 total births. Numerator = Stillbirths + Infant deaths
- aDenmark and Sweden did not report on stillbirths less than 28 weeks until 2004 and 2008, respectively
- Only births with gestational age <22 weeks excluded from the rate calculation for births ≥22 weeks i.e., births with unknown gestational age included in the calculations
- Calculations of rates for births ≥28 weeks and birth weight ≥500 g and ≥1000 g were carried out in a similar manner
- Finland was used as the reference category for calculation of rate ratios
