Table 3

Characteristics comparing individuals who died or survived the follow-up period

DiedSurvived
n65922 768 838
Study individuals’ characteristics, n (%)
Asthma
 Yes548 (8.3)260 774 (9.4)
 No6044 (91.7)2 508 064 (90.6)
Sex
 Male4079 (61.9)1 421 150 (51.3)
 Female2513 (38.1)1 347 681 (48.7)
Prematurity
 Yes (≤37 weeks)715 (10.9)165 571 (6.0)
 No (>37 weeks)5877 (89.1)2 603 267 (94.0)
Small for gestational age
 Yes381 (6.2)63 650 (2.3)
 No5966 (91.0)2 622 298 (94.7)
 Missing258 (3.8)82 890 (3.0)
Life-limiting condition
 Yes970 (14.7)34 308 (1.2)
 No5622 (85.3)2 734 530 (98.8)
Family characteristics
Maternal age at delivery, years
 <20253 (3.8)57 440 (2.0)
 ≥20 to <251539 (23.4)464 273 (16.8)
 ≥25 to <302235 (33.9)928 652 (33.5)
 ≥30 to <351674 (25.4)856 648 (30.9)
 ≥35 to <40711 (10.8)382 386 (13.8)
 ≥40179 (2.7)77 937 (2.8)
 Missing1 (<0.1)1502 (<0.1)
Maternal smoking during pregnancy
 Yes1669 (25.3)393 871 (14.2)
 No4456 (67.6)2 218 667 (80.1)
 Missing467 (7.1)156 300 (5.6)
Maternal country of birth
 Sweden5517 (83.7)2 286 702 (82.6)
 Denmark, Norway, Finland, Iceland294 (4.5)75 822 (2.7)
 Other780 (11.8)403 031 (14.6)
 Missing1 (<0.1)3283 (0.12)
Parental income
 Lowest1637 (24.8)531 983 (19.2)
 Lower middle1294 (19.6)530 976 (19.2)
 Middle1218 (18.4)531 564 (19.2)
 Upper middle1122 (17.0)530 674 (19.2)
 Highest1093 (16.6)530 774 (19.2)
 Missing228 (3.6)112 867 (4.08)
Parental education
 Compulsory school680 (10.3)176 485 (6.4)
 High school3659 (55.5)1 253 475 (45.3)
 College or further education1987 (30.1)1 207 980 (43.6)
 Missing266 (4.1)130 898 (4.7)