Table 2 Characteristics of samples (full and consecutive) and the consecutive sample stratified by year of inclusion
From: Screening for thyroid disease in pregnancy: a study of Danish clinical practice
Full sample | Consecutive sample | 2020a | 2021a | |||||
|---|---|---|---|---|---|---|---|---|
n | % | n | % | n | % | n | % | |
Pregnant women | 1,615 | 300 | 150 | 150 | ||||
Age | ||||||||
< 25 years | 174 | 10.8 | 28 | 9.3 | 18 | 12.0 | 10 | 6.7 |
25–30 years | 686 | 42.5 | 115 | 38.3 | 59 | 39.3 | 56 | 37.3 |
> 30 years | 755 | 46.8 | 157 | 52.3 | 73 | 48.7 | 84 | 56.0 |
Parity | ||||||||
0 | 818 | 50.7 | 153 | 51.0 | 72 | 48.0 | 81 | 54.0 |
1 | 576 | 35.7 | 108 | 36.0 | 58 | 38.7 | 50 | 33.3 |
> 2 | 221 | 13.6 | 39 | 13.0 | 20 | 13.3 | 19 | 12.7 |
BMIb | ||||||||
< 25 kg/m2 | 830 | 51.7 | 151 | 50.3 | 71 | 47.3 | 80 | 53.3 |
25–30 kg/m2 | 459 | 28.6 | 88 | 29.3 | 49 | 32.7 | 39 | 26.0 |
> 30 kg/m2 | 317 | 19.7 | 61 | 20.3 | 30 | 20.0 | 31 | 20.7 |
Smoking | ||||||||
Current | 93 | 5.8 | 13 | 4.3 | 5 | 3.3 | 8 | 5.3 |
Previous | 21 | 1.3 | 12 | 4.0 | 5 | 3.3 | 7 | 4.7 |
Never | 1,501 | 92.9 | 275 | 91.7 | 140 | 93.3 | 135 | 90.0 |
Ethnicityb | ||||||||
Caucasian | 1,542 | 95.5 | 288 | 96.3 | 144 | 96.0 | 144 | 96.6 |
Other | 72 | 4.5 | 11 | 3.7 | 6 | 4.0 | 5 | 3.4 |
Conceptionb | ||||||||
Spontaneous | 1,429 | 88.5 | 254 | 85.0 | 123 | 82.0 | 131 | 87.9 |
Other | 185 | 11.5 | 45 | 15.0 | 27 | 18.0 | 18 | 12.1 |