Table 1 Demographic characteristics of the study population and exposure (n = 142)
Characteristic | Mean (p10, p90) or n (%) |
|---|---|
Mothers | |
 Age, yrs | 29.3 (24.0, 34.0) |
 Pre-gestational BMI, kg/m2 | 24.2 (19.5, 30.5) |
 Education |  |
  Low | 15 (10.6%) |
  Medium | 50 (35.2%) |
  High | 77 (54.2%) |
 Smoking status |  |
  Never-smoker | 80 (56.3%) |
  Former-smokers | 36 (25.4%) |
  Smokers | 26 (18.3%) |
 Alcohol consumption |  |
 No | 119 (83.8%) |
 Occasionally | 23 (16.2%) |
 Parity |  |
  1 | 70 (49.3%) |
  2 | 59 (41.5%) |
  ≥ 3 | 13 (9.2%) |
Newborns | |
 Sex |  |
  Boys | 66 (46.5%) |
 Season at conception |  |
  Winter | 38 (26.8%) |
  Spring | 40 (28.2%) |
  Summer | 37 (26.1%) |
  Autumn | 27 (19.0%) |
 Ethnicity |  |
  European-Caucasian | 124 (87.3%) |
 Gestational age, wks | 39.7 (38.3, 41.1) |
 Birth weight, g | 3454 (2910, 4045) |
Exposure | |
 Long-terma PM2.5, μg/m3 | 16.0 (13.9, 18.3) |
 Short-termb PM2.5, μg/m3 | 13.3 (8.0, 21.4) |
 Weekly apparent temp, °C | 8.9 (2.4, 16.5) |