Apgar score at 5 min | ||||
---|---|---|---|---|
Variables | 0–5 | 6–8 | 9–10 | Unknown |
Country | ||||
Denmark | 10673 (1) | 42118 (2) | 1669956 (96) | 18868 (1) |
Sweden | 22694 (1) | 116167 (4) | 2951063 (90) | 229649 (7) |
Sex | ||||
Boys | 18829 (1) | 89973 (3) | 2365951 (91) | 126011 (5) |
Girls | 14537 (1) | 68312 (3) | 2255068 (92) | 122506 (5) |
Birth order | ||||
1 | 16910 (1) | 91199 (4) | 1971064 (90) | 100239 (5) |
2 | 9388 (1) | 42290 (2) | 1694866 (92) | 93228 (5) |
≥3 | 5782 (1) | 23091 (2) | 894631 (92) | 484404 (5) |
Unknown | 1287 (2) | 1705 (2) | 60458 (86) | 6646 (9) |
Gestational age | ||||
<37 weeks | 8902 (4) | 27338 (11) | 191552 (79) | 14439 (6) |
>=37 weeks | 22990 (<1) | 129238 (3) | 4368046 (92) | 226668 (5) |
Unknown | 1475 (2) | 1709 (2) | 61421 (85) | 7410 (10) |
Birth weight (g) | ||||
<2500 | 8238 (5) | 22489 (13) | 135895 (76) | 11150 (6) |
2500–3249 | 7766 (1) | 39824 (3) | 1137398 (91) | 62399 (5) |
3250–3999 | 10994 (<1) | 65669 (2) | 2448691 (92) | 128267 (5) |
>=4000 | 4340 (<1) | 27736 (3) | 833472 (92) | 37497 (4) |
Unknown | 2029 (3) | 2567 (3) | 65563 (83) | 9204 (12) |
Maternal age | ||||
<=26 | 12936 (1) | 60051 (3) | 1690721 (90) | 120969 (6) |
27–30 | 9293 (1) | 45162 (3) | 1378031 (92) | 68490 (5) |
≥31 | 11134 (1) | 53060 (3) | 1552002 (93) | 59009 (4) |
Unknown | 4 (1) | 12 (4) | 265 (83) | 39 (12) |
Maternal education (years) | ||||
Low (≤9) | 16346 (1) | 72583 (3) | 2006475 (90) | 146220 (7) |
Middle (10–14) | 8770 (1) | 45007 (3) | 1296875 (92) | 52045 (4) |
High (≥15) | 5600 (1) | 28120 (3) | 908327 (93) | 36363 (4) |
Unknown | 2651 (1) | 12575 (3) | 409342 (93) | 13889 (3) |
Maternal smoking during pregnancy† | ||||
Yes | 4755 (1) | 21254 (3) | 633618 (94) | 10935 (2) |
No | 14661 (1) | 85122 (3) | 2419740 (95) | 32303 (1) |
Unknown | 2395 (1) | 9514 (4) | 222589 (91) | 9968 (4) |
*Value is n (%). Study population includes all 5 091 188 singletons born in Denmark 1978–2006 and born in Sweden 1973–2006.
†Smoking status is available for 1991–2006 in Denmark and for 1983–2006 in Sweden.