Table 1 Description of women in the study population.
From: Personal exposure to air pollutants and immune system biomarkers in pregnant women
Characteristics | N = 2701 |
|---|---|
Age (years) | 32.1 (29.9–35.1) |
Age (categories) | |
< 30 | 69 (26%) |
30–35 | 133 (49%) |
≥ 35 | 68 (25%) |
BMI before pregnancy | 21.6 (19.8–24.1) |
BMI before pregnancy (categories) | |
< 18.5 kg/m2 | 15 (6%) |
18.5–25 kg/m2 | 197 (74%) |
25–30 kg/m2 | 43 (16%) |
≥ 30 kg/m2 | 12 (4%) |
Missing | 3 |
Education level | |
High school | 13 (5%) |
Bachelor’s degree | 29 (11%) |
Master’s degree | 70 (26%) |
≥ Postgraduate | 157 (58%) |
Missing | 1 |
Active smoking before or during pregnancy | |
No | 228 (90%) |
Yes | 24 (10%) |
Missing | 18 |
Passive smoking during pregnancy | |
No | 204 (80%) |
Yes | 50 (20%) |
Missing | 16 |
Symptoms of asthma before or during pregnancy | |
No | 228 (84%) |
Yes | 42 (16%) |
Symptoms of rhinitis before or during pregnancy | |
No | 162 (60%) |
Yes | 108 (40%) |
Season of sampling | |
Autumn | 55 (20%) |
Spring | 83 (31%) |
Summer | 69 (26%) |
Winter | 63 (23%) |
Gestational age at sampling (weeks) | 19.0 (18.0–21.0) |
