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|
GA, weeks
|
25–27
|
28–31
|
32–33
|
34–36
|
25–36
|
|---|
|
Preterm births, n
|
85
|
314
|
428
|
1824
|
2651
|
|
Prevalence, ‰1
|
1.4
|
5.3
|
7.2
|
30.8
|
44.7
|
|
Perinatal mortality, n
|
49
|
83
|
32
|
60
|
224
|
|
R1, %
|
57.6
|
26.4
|
7.5
|
3.3
|
8.4
|
|
R2, ‰
|
0.8
|
1.4
|
0.5
|
1.0
|
3.8
|
|
Fetal deaths / stillbirths, n
|
31
|
49
|
20
|
37
|
137
|
|
R1, %
|
36.5
|
15.6
|
4.7
|
2.0
|
5.2
|
|
R2, ‰
|
0.5
|
0.8
|
0.3
|
0.6
|
2.3
|
|
Deaths at DR, n
|
12
|
11
|
2
|
2
|
27
|
|
R1, %
|
14.1
|
3.5
|
0.5
|
0.1
|
1.0
|
|
R2, ‰
|
0.2
|
0.2
|
0.0
|
0.0
|
0.5
|
|
Neonatal mortality, n
|
24
|
42
|
15
|
26
|
107
|
|
R1, %2
|
44.4
|
15.8
|
3.7
|
1.5
|
4.3
|
|
R2, ‰3
|
0.4
|
0.7
|
0.3
|
0.4
|
1.8
|
|
All deaths, n
|
61
|
93
|
35
|
63
|
252
|
|
R1, %
|
71.8
|
29.6
|
8.2
|
3.5
|
9.5
|
|
R2, ‰
|
1.0
|
1.6
|
0.6
|
1.1
|
4.3
|
- Abbreviations: GA, gestational age; DR, delivery room. Values are number (n) or rate. GA-specific mortality rate (R1, %) = (number of deaths of each GA stratum / number of births of the same GA stratum) × 100; GA-specific mortality rate corrected by the number of total births (including term and post term births) of whole region (R2, ‰) = GA-specific mortality rate × prevalence of each GA in the total births = (number of deaths of each GA stratum / the number of total births [59,245]) × 1000. For definition of all-death see Table 1 legends, note 6
- 1. Prevalences of each GA in the total births (‰) = (number of births of each GA stratum / the number of total births) × 1000
- 2. R1, calculated by number of neonatal deaths of each GA stratum divided by number of livebirths in the same GA stratum
- 3. R2, calculated by number of neonatal deaths of each GA stratum divided by the number of livebirths (including term and post term births) of whole region (59,056)
