|
Gestational age/Birth weight
|
Canada
|
USA
|
Denmark
|
Finland
|
Iceland
|
Norway
|
Sweden
|
|---|
|
Ratio (95 % CI)
|
Ratio (95 % CI)
|
Ratio (95 % CI)
|
Ratio (95 % CI)
|
Ratio (95 % CI)
|
Ratio (95 % CI)
|
Ratio (95 % CI)
|
|---|
|
GA (weeks)
|
<22
|
155.8 (145.9–166.4)
|
163.6 (161.4–165.9)
|
-a
|
200.0 (69.5–649.6)
|
-
|
2073.3 (1698.6–2559.6)
|
-a
|
|
22–23
|
112.1 (105.3–119.3)
|
79.2 (78.3–80.2)
|
-
|
90.8 (72.8–113.3)
|
176.2 (100.5–316.8)
|
173.9 (149.5–202.6)
|
-
|
|
24–25
|
38.2 (35.6–41.0)
|
26.7 (26.3–27.1)
|
-
|
37.0 (29.6–46.0)
|
42.6 (23.9–73.2)
|
40.7 (35.2–46.9)
|
-
|
|
26–27
|
18.2 (16.8–19.7)
|
15.3 (15.0–15.5)
|
-
|
23.5 (18.9–28.9)
|
23.0 (11.9–41.5)
|
20.1 (17.2–23.3)
|
-
|
|
28–31
|
9.6 (9.1–10.1)
|
7.6 (7.5–7.7)
|
11.4 (10.4–12.4)
|
9.4 (8.3–10.5)
|
10.9 (7.2–16.1)
|
8.6 (7.7–9.6)
|
9.2 (8.5–10.0)
|
|
32–36
|
1.7 (1.6–1.7)
|
1.3 (1.3–1.3)
|
2.0 (1.9–2.2)
|
1.6 (1.5–1.7)
|
2.0 (1.4–2.7)
|
1.7 (1.6–1.9)
|
1.9 (1.8–2.0)
|
|
37–41
|
0.2 (0.2–0.2)
|
0.1 (0.1–0.1)
|
0.2 (0.2–0.3)
|
0.1 (0.1–0.1)
|
0.1 (0.1–0.2)
|
0.2 (0.2–0.2)
|
0.2 (0.2–0.2)
|
|
≥42
|
0.2 (0.1–0.2)
|
0.1 (0.1–0.1)
|
0.2 (0.2–0.2)
|
0.1 (0.0–0.1)
|
0.0 (0.0–0.2)
|
0.2 (0.2–0.2)
|
0.2 (0.2–0.2)
|
|
Unknown
|
2.4 (2.1–2.9)
|
7.0 (7.0–7.1)
|
1.3 (1.1–1.6)
|
10.1 (9.2–11.0)
|
0.0 (0.0–1.9)
|
2.3 (2.1–2.5)
|
2.1 (1.4–3.1)
|
|
BW (grams)
|
<500
|
128.6 (121.7–135.8)
|
139.4 (137.9–140.8)
|
51.3 (38.7–67.4)
|
196.4 (162.4–238.2)
|
383.3 (151.8–1151.6)
|
1077.9 (947.1–1229.8)
|
13.5 (8.5–20.6)
|
|
500–749
|
59.5 (56.4–62.7)
|
32.7 (32.3–33.1)
|
18.5 (15.3–22.2)
|
47.0 (41.3–53.4)
|
71.7 (47.3–107.8)
|
54.7 (48.9–61.1)
|
9.6 (7.8–11.8)
|
|
750–999
|
22.0 (20.5–23.6)
|
13.8 (13.5–14.0)
|
11.4 (9.6–13.6)
|
21.1 (18.0–24.6)
|
21.3 (11.8–36.2)
|
16.8 (14.4–19.4)
|
8.6 (7.2–10.1)
|
|
1,000–1,499
|
9.7 (9.1–10.3)
|
7.5 (7.4–7.6)
|
7.6 (6.7–8.5)
|
9.5 (8.3–10.8)
|
12.1 (7.7–18.2)
|
8.3 (7.3–9.3)
|
8.4 (7.6–9.3)
|
|
1,500–1,999
|
4.2 (4.0–4.5)
|
3.3 (3.2–3.3)
|
3.8 (3.4–4.2)
|
4.3 (3.8–4.9)
|
2.4 (1.1–4.5)
|
3.8 (3.4–4.3)
|
4.5 (4.1–5.0)
|
|
≥2000
|
0.2 (0.2–0.2)
|
0.2 (0.2–0.2)
|
0.3 (0.2–0.3)
|
0.2 (0.2–0.2)
|
0.2 (0.1–0.2)
|
0.2 (0.2–0.2)
|
0.2 (0.2–0.3)
|
|
Unknown
|
15.8 (14.7–17.0)
|
308.0 (302.4–313.4)
|
7.3 (6.7–8.0)
|
4.7 (3.4–6.2)
|
0.0 (0.0–109.1)
|
48.0 (42.0–54.8)
|
2.5 (2.0–3.0)
|
|
Total
|
0.6 (0.6–0.6)
|
0.7 (0.7–0.7)
|
0.4 (0.4–0.5)
|
0.4 (0.4–0.4)
|
0.4 (0.4–0.5)
|
0.9 (0.9–0.9)
|
0.4 (0.3–0.4)
|
- Ratios are expressed per 100 live births
- aDenmark and Sweden did not report stillbirths <28 weeks until 2004 and 2008, respectively
