Characteristics of 6671 Healthy Pregnant Women Included in the Present Study From the Danish National Birth Cohort
| . | n . | % . |
|---|---|---|
| Maternal age at birth of the child (y) | ||
| Median (IQR) | 30 | (27–33) |
| <30 | 3289 | 49.3 |
| ≥30 | 3382 | 50.7 |
| Parity | ||
| Nulliparous | 3306 | 49.6 |
| Multiparous | 3365 | 50.4 |
| Year of blood sampling | ||
| 1997–2000 | 4761 | 71.4 |
| 2001–2002 | 1910 | 28.6 |
| Geographical residencea | ||
| East (mild ID) | 2500 | 37.6 |
| West (moderate ID) | 4144 | 62.4 |
| Smoking in the pregnancyb | ||
| No | 4908 | 73.6 |
| Yesc | 1761 | 26.4 |
| Prepregnancy alcohol intake (units per week)d | ||
| <1 | 2364 | 35.5 |
| ≥1 | 4295 | 64.5 |
| Prepregnancy BMI (kg/m2)e | ||
| Median (IQR) | 22.5 | (20.6–25.2) |
| <18.5 | 315 | 4.8 |
| ≥18.5 and <25 | 4526 | 68.9 |
| ≥25 and <30 | 1220 | 18.6 |
| ≥30 (obesity) | 503 | 7.7 |
| Originf | ||
| Born in Denmark | 6526 | 97.9 |
| Not born in Denmark | 142 | 2.1 |
| . | n . | % . |
|---|---|---|
| Maternal age at birth of the child (y) | ||
| Median (IQR) | 30 | (27–33) |
| <30 | 3289 | 49.3 |
| ≥30 | 3382 | 50.7 |
| Parity | ||
| Nulliparous | 3306 | 49.6 |
| Multiparous | 3365 | 50.4 |
| Year of blood sampling | ||
| 1997–2000 | 4761 | 71.4 |
| 2001–2002 | 1910 | 28.6 |
| Geographical residencea | ||
| East (mild ID) | 2500 | 37.6 |
| West (moderate ID) | 4144 | 62.4 |
| Smoking in the pregnancyb | ||
| No | 4908 | 73.6 |
| Yesc | 1761 | 26.4 |
| Prepregnancy alcohol intake (units per week)d | ||
| <1 | 2364 | 35.5 |
| ≥1 | 4295 | 64.5 |
| Prepregnancy BMI (kg/m2)e | ||
| Median (IQR) | 22.5 | (20.6–25.2) |
| <18.5 | 315 | 4.8 |
| ≥18.5 and <25 | 4526 | 68.9 |
| ≥25 and <30 | 1220 | 18.6 |
| ≥30 (obesity) | 503 | 7.7 |
| Originf | ||
| Born in Denmark | 6526 | 97.9 |
| Not born in Denmark | 142 | 2.1 |
IQR, interquartile range (25th–75th percentile); ID, iodine deficiency.
Information obtained from Statistic Denmark, missing (n = 27) not included.
Information self-reported in the pregnancy interview (did you smoke in the pregnancy? yes/no), missing (n = 2) not included.
Still smoking at the time of the interview (n = 1146).
Information self-reported in the pregnancy interview, missing (n = 12) not included.
Information from self-reported prepregnancy weight and height, missing (n = 107) not included.
Information obtained from Statistic Denmark, missing (n = 3) not included.
Characteristics of 6671 Healthy Pregnant Women Included in the Present Study From the Danish National Birth Cohort
| . | n . | % . |
|---|---|---|
| Maternal age at birth of the child (y) | ||
| Median (IQR) | 30 | (27–33) |
| <30 | 3289 | 49.3 |
| ≥30 | 3382 | 50.7 |
| Parity | ||
| Nulliparous | 3306 | 49.6 |
| Multiparous | 3365 | 50.4 |
| Year of blood sampling | ||
| 1997–2000 | 4761 | 71.4 |
| 2001–2002 | 1910 | 28.6 |
| Geographical residencea | ||
| East (mild ID) | 2500 | 37.6 |
| West (moderate ID) | 4144 | 62.4 |
| Smoking in the pregnancyb | ||
| No | 4908 | 73.6 |
| Yesc | 1761 | 26.4 |
| Prepregnancy alcohol intake (units per week)d | ||
| <1 | 2364 | 35.5 |
| ≥1 | 4295 | 64.5 |
| Prepregnancy BMI (kg/m2)e | ||
| Median (IQR) | 22.5 | (20.6–25.2) |
| <18.5 | 315 | 4.8 |
| ≥18.5 and <25 | 4526 | 68.9 |
| ≥25 and <30 | 1220 | 18.6 |
| ≥30 (obesity) | 503 | 7.7 |
| Originf | ||
| Born in Denmark | 6526 | 97.9 |
| Not born in Denmark | 142 | 2.1 |
| . | n . | % . |
|---|---|---|
| Maternal age at birth of the child (y) | ||
| Median (IQR) | 30 | (27–33) |
| <30 | 3289 | 49.3 |
| ≥30 | 3382 | 50.7 |
| Parity | ||
| Nulliparous | 3306 | 49.6 |
| Multiparous | 3365 | 50.4 |
| Year of blood sampling | ||
| 1997–2000 | 4761 | 71.4 |
| 2001–2002 | 1910 | 28.6 |
| Geographical residencea | ||
| East (mild ID) | 2500 | 37.6 |
| West (moderate ID) | 4144 | 62.4 |
| Smoking in the pregnancyb | ||
| No | 4908 | 73.6 |
| Yesc | 1761 | 26.4 |
| Prepregnancy alcohol intake (units per week)d | ||
| <1 | 2364 | 35.5 |
| ≥1 | 4295 | 64.5 |
| Prepregnancy BMI (kg/m2)e | ||
| Median (IQR) | 22.5 | (20.6–25.2) |
| <18.5 | 315 | 4.8 |
| ≥18.5 and <25 | 4526 | 68.9 |
| ≥25 and <30 | 1220 | 18.6 |
| ≥30 (obesity) | 503 | 7.7 |
| Originf | ||
| Born in Denmark | 6526 | 97.9 |
| Not born in Denmark | 142 | 2.1 |
IQR, interquartile range (25th–75th percentile); ID, iodine deficiency.
Information obtained from Statistic Denmark, missing (n = 27) not included.
Information self-reported in the pregnancy interview (did you smoke in the pregnancy? yes/no), missing (n = 2) not included.
Still smoking at the time of the interview (n = 1146).
Information self-reported in the pregnancy interview, missing (n = 12) not included.
Information from self-reported prepregnancy weight and height, missing (n = 107) not included.
Information obtained from Statistic Denmark, missing (n = 3) not included.
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