Table 2 Characteristics of the study population
Characteristic | ASD cases (n = 75) | Controls (n = 135) | p value |
|---|---|---|---|
Mother’s age at delivery (median, min-max, year) | 34 (17–41) | 35 (21–44) | 0.218 |
Father’s age at delivery (median, min-max, year) | 35 (19–53) | 35 (20–58) | 0.362 |
Gestational week at sampling (median, min-max) | 15 (11–20) | 15 (10–29) | 0.426 |
Parity (n, %) | Â | Â | 0.797 |
 1st child | 28 (37.30%) | 48 (35.6%) |  |
 > 2nd child | 47 (62.70%) | 87 (64.4%) |  |
Gestational age at birth (n, %) | Â | Â | 0.424 |
 Preterm (< 260 days) | 7 (9.30%) | 15 (11.20%) |  |
 Term (260 days–294 days) | 67 (89.30%) | 113 (84.30%) |  |
 Post-term (> 295 days) | 1 (1.30%) | 6 (4.50%) |  |
Gender of the children (n, %) | Â | Â | 0.731 |
 Female | 13 (17.30%) | 26 (19.30%) |  |
 Male | 62 (82.70%) | 109 (80.70%) |  |
Birth weight of the children (n, %) | Â | Â | 0.521 |
 < 2500 g | 3 (4.10%) | 10 (7.50%) |  |
 2500 g–4000 g | 57 (77.00%) | 95 (70.90%) |  |
 > 4000 g | 14 (18.90%) | 29 (21.60%) |  |
Apgar score of the children (n, %) | Â | Â | 0.952 |
 > 7 | 70 (98.60%) | 130 (98.50%) |  |
 < 7 | 1 (1.40%) | 2 (1.50%) |  |
Congenital malformation of the children (n, %) |  |  | < 0.0001 |
 No | 53 (70.70%) | 124 (91.90%) |  |
 Yes | 22 (29.30%) | 11 (8.10%) |  |