Table 1 Characteristics of study population according to estimated fetal growth
From: Birth weight, gestational age, fetal growth and childhood asthma hospitalization
Characteristics | N | SGA | AGA | LGA |
|---|---|---|---|---|
Gestational age | ||||
22-28 weeks | 10,632 | 21.5 | 72.5 | 6.0 |
29-32 weeks | 31,964 | 22.0 | 72.4 | 5.6 |
33-36 weeks | 218,432 | 8.5 | 85.4 | 6.1 |
37-38 weeks | 934,450 | 3.1 | 91.3 | 5.6 |
39-41 weeks | 4,010,066 | 2.3 | 94.7 | 3.0 |
42-45 weeks | 450,963 | 4.4 | 94.2 | 1.4 |
Birth weight | ||||
<1000 g | 7,633 | 54.3 | 44.9 | 0.8 |
1000-1499 g | 17,555 | 49.3 | 50.1 | 0.6 |
1500-1999 g | 36,768 | 45.9 | 53.7 | 0.4 |
2000-2499 g | 123,725 | 42.2 | 57.5 | 0.3 |
2500-2999 g | 598,400 | 13.5 | 86.3 | 0.2 |
3000-3499 g | 1,828,077 | 0.3 | 99.5 | 0.2 |
3500-3999 g | 1,995,356 | 0 | 99.2 | 0.8 |
4000-4499 g | 855,601 | 0 | 91.8 | 8.2 |
4500-4999 g | 170,630 | 0 | 50.7 | 49.3 |
≥5000 g | 22,762 | 0 | 4.1 | 95.9 |
Country of residence | ||||
Denmark | 1,538,093 | 3.5 | 93.0 | 3.5 |
Sweden | 3,067,670 | 3.0 | 93.8 | 3.2 |
Finland | 1,050,744 | 2.2 | 93.6 | 4.2 |
Maternal age at delivery | ||||
15-26 years | 2,089,571 | 3.4 | 94.1 | 2.5 |
27-30 years | 1,604,838 | 2.7 | 93.9 | 3.4 |
≥31 years | 1,961,791 | 2.7 | 92.7 | 4.6 |
Unknown | 307 | 5.9 | 91.2 | 2.9 |
Maternal social status | ||||
Not in labor market | 836,704 | 3.3 | 93.3 | 3.4 |
Unskilled workers | 1,131,613 | 3.0 | 93.5 | 3.5 |
Skilled workers and white collar workers | 1,591,435 | 2.8 | 93.7 | 3.5 |
Top level status | 778,580 | 2.8 | 93.6 | 3.6 |
Unknown | 1,318,175 | 3.0 | 93.5 | 3.5 |
Parity | ||||
1 | 2,332,141 | 4.1 | 93.9 | 2.0 |
2 | 2,018,981 | 2.2 | 93.9 | 3.9 |
≥3 | 1,305,385 | 2.2 | 92.3 | 5.5 |
Mode of delivery | ||||
Delivered vaginally | 5,020,529 | 2.5 | 94.3 | 3.2 |
Delivered by cesarean section | 635,077 | 6.7 | 87.4 | 5.9 |
Unknown | 901 | 3.6 | 92.2 | 4.2 |
Sex of the child | ||||
Boy | 2,902,138 | 2.9 | 93.5 | 3.6 |
Girl | 2,754,369 | 3.0 | 93.6 | 3.4 |
Calendar year of birth | ||||
1973-1977 | 493,193 | 4.5 | 93.0 | 2.5 |
1978-1982 | 629,589 | 3.8 | 93.6 | 2.6 |
1983-1987 | 777,959 | 3.3 | 93.7 | 3.0 |
1988-1992 | 1,178,159 | 2.8 | 93.6 | 3.6 |
1993-1997 | 1,106,229 | 2.5 | 93.5 | 4.0 |
1998-2002 | 995,480 | 2.5 | 93.6 | 3.9 |
2003-2005 | 475,898 | 2.4 | 93.7 | 3.9 |
Family history of asthma | ||||
Yes | 416,278 | 3.7 | 92.8 | 3.5 |
No | 5,240,229 | 2.9 | 93.6 | 3.5 |