Characteristics | ASD (n = 84) | GP (n = 159) | DD (n = 49) | Chi-square | |
---|---|---|---|---|---|
 | N (%) | N (%) | N (%) | P-values | |
 |  |  |  | ASD versus GP | DD versus GP |
Gender | Â | Â | Â | Â | Â |
  Male | 73 (86.9) | 139 (87.4) | 29 (59.1) | 0.89 | < 0.01 |
  Female | 11 (13.1) | 20 (12.6) | 20 (40.8) |  |  |
Maternal ethnicity | Â | Â | Â | Â | Â |
  Hispanics | 20 (23.8) | 73 (45.9) | 28 (57.1) |  |  |
  Non-Hispanics | 64 (76.2) | 86 (54.1) | 21 (42.9) | < 0.01 | 0.12 |
Maternal place of birth | Â | Â | Â | Â | Â |
  US | 45 (53.6) | 71 (44.7) | 16 (32.7) | < 0.01 | 0.26 |
  Mexico | 9 (10.7) | 58 (36.5) | 22 (44.9) |  |  |
  Other | 30 (35.7) | 30 (18.8) | 11 (22.4) |  |  |
Maternal age (median and inter-quartile range) | 31 (28 – 34) | 28 (24 – 32) | 29 (25 – 32) | < 0.01 | 0.68 |
  Gestational age (GA in days) |  |  |  |  |  |
  Preterm (GA < 260 days) | 9 (10.7) | 23 (14.5) | 11 (22.5) | 0.42 | 0.20 |
  Term (GA ≥ 260 days) | 75 (89.3) | 136 (85.5) | 38 (77.5) |  |  |
  GA median and interquartile range | 276 (269 – 280) | 274 (267 – 279) | 276 (265 – 282) | 0.22 | 0.90 |
Child age (in days at newborn blood draw, median and inter- quartile range) | 1.22 (1.02 – 1.76) | 1.18 (1.03 – 1.56) | 1.40 (1.05 – 2.27) | 0.38 | 0.03 |
Birth year | Â | Â | Â | Â | Â |
  2000 | 23 (27.4) | 31 (19.5) | 26 (53) | 0.15 | < 0.01 |
  2001 | 61 (72.6) | 128 (80.5) | 23 (47) |  |  |