Table 1 Characteristics of the study population and subjects not included in the current analysis
From: The effect of perinatal anxiety on bronchiolitis is influenced by polymorphisms in ROS-related genes
| Â | Women included in this study | Women not included in this study | P-value | ||
|---|---|---|---|---|---|
|  | n | Mean ± SD or n(%) | n | Mean ± SD or n(%) |  |
Covariates (mother) | 440 | Â | 193 | Â | Â |
Maternal age (years) |  | 32.5 ± 3.55 |  | 32.4 ± 3.45 | 0.736 |
BMI (kg/m2) |  | 20.7 ± 2.67 |  | 20.7 ± 2.60 | 0.754 |
Maternal educational level | Â | Â | Â | Â | Â |
  Secondary school |  | 31 (7.0%) |  | 21 (10.9%) | 0.202 |
  College or University |  | 289 (65.7%) |  | 116 (60.1%) |  |
  Graduate school |  | 120 (27.3%) |  | 56 (29.0%) |  |
Environmental tobacco exposure | Â | 265 (60.8%) | Â | 105 (54.4%) | 0.171 |
History of any allergic disorder (AD, AR, Asthma) | Â | 124 (28.2%) | Â | 59 (30.7%) | 0.568 |
Covariates (father) | 410 | Â | Â | Â | Â |
History of any allergic disorder (AD, AR, Asthma) | Â | 115 (26.1%) | Â | 51 (26.4%) | 0.939 |
Covariates (infant) | 440 | Â | 193 | Â | Â |
Sex: Girl | Â | 217 (49.3%) | Â | 85 (44.2%) | 0.227 |
Birth weight (g) |  | 3143.9 ± 422.01 |  | 3198.3 ± 395.43 | 0.153 |
Season of birth | Â | Â | Â | Â | Â |
  Spring |  | 117 (26.6%) |  | 28 (14.5%) | < 0.001 |
  Summer |  | 117 (26.6%) |  | 26 (13.5%) |  |
  Autumn |  | 96 (21.8%) |  | 91 (47.2%) |  |
  Winter |  | 110 (25.0%) |  | 48 (24.9%) |  |
Mode of delivery: Caesarean section | Â | 134 (34.4%) | Â | 68 (35.2%) | 0.793 |
Gestational age (months) |  | 39.2 ± 1.08 |  | 39.2 ± 1.09 | 0.968 |
Presence of siblings | Â | 198 (45.0%) | Â | 83 (43.0%) | 0.705 |
Daycare attendance during the first year of life | Â | 105 (23.9%) | Â | 43 (22.3%) | 0.740 |
Exposure to perinatal maternal anxiety | 440 | Â | N/A | Â | Â |
STAI score |  | 41.0 ± 8.47 (20–71) |  |  |  |
Physician diagnosed respiratory tract infection during the first year of life | Â | Â | Â | ||
  Upper respiratory tract infection |  | 337 (76.6%) |  |  |  |
  Lower respiratory tract infection |  | 65 (14.8%) |  |  |  |
  Bronchiolitis |  | 48 (10.9%) |  |  |  |