Table 1 Demographic characteristic of ASD cases, DD and GP controls: sample 1 and 2—the early markers for autism study
Sample 1 | Sample 2 | |||||
|---|---|---|---|---|---|---|
ASD N=84 (%) | DD N=46 (%) | GP N=146 (%) | ASD N=416 (%) | DD N=188 (%) | GP N=432 (%) | |
Maternal age (years) | ||||||
<20 | 2.4 | 6.4 | 6.1 | 3.4 | 13.8 | 5.3 |
20–24 | 8.3 | 17.0 | 22.3 | 13.9 | 23.0 | 16.7 |
25–29 | 21.4 | 36.2 | 31.1 | 26.2 | 27.7 | 30.2 |
30–34 | 45.2 | 27.7 | 30.4 | 37.3 | 23.4 | 34.7 |
⩾35 | 22.6 | 12.8 | 10.1 | 9.2 | 12.2 | 13.0 |
Maternal education | ||||||
<High school | NA | NA | NA | 15.1 | 41.9 | 24.5 |
High school | NA | NA | NA | 20.0 | 26.9 | 26.9 |
Undergrad college | NA | NA | NA | 44.2 | 25.3 | 34.0 |
Post-graduate | NA | NA | NA | 19.7 | 5.9 | 13.7 |
Maternal race | ||||||
White | 67.9 | 76.6 | 79.1 | 73.6 | 87.1 | 78.9 |
Asian | 22.6 | 17.0 | 18.2 | 21.2 | 6.5 | 15.5 |
Other | 7.1 | 6.4 | 2.7 | 4.8 | 6.5 | 4.9 |
Maternal ethnicity | ||||||
Hispanics | 23.8 | 57.5 | 46.6 | 37.5 | 69.9 | 47.0 |
Non-Hispanics | 76.2 | 42.6 | 53.4 | 62.0 | 30.1 | 52.1 |
Maternal place of birth | ||||||
USA | 53.6 | 34.0 | 44.6 | 50.5 | 44.1 | 48.2 |
Mexico | 10.7 | 44.7 | 36.5 | 11.1 | 46.2 | 30.6 |
Other | 35.7 | 21.3 | 18.9 | 13.2 | 9.7 | 21.3 |
Maternal weight at blood draw (lbs) | ||||||
Mean (s.d.) | 145.1 (26.7) | 149.8 (38.9) | 146.5 (34.1) | 151.8 (36.0) | 158.5 (37.2) | 150.8 (34.1) |
Gestational age at blood draw (days) | ||||||
Mean (s.d.) | 119.8 (7.9) | 117.8 | 118.9 (7.4) | 119.1 (8.8) | 119.9 (9.2) | 118.7 (8.4) |
Sex | ||||||
Male | 86.9 | 57.5 | 87.2 | 82.5 | 56.5 | 82.9 |
Female | 13.1 | 42.6 | 12.8 | 17.6 | 43.6 | 17.1 |
Child birth year | ||||||
2000 | 27.4 | 48.9 | 17.6 | 17.6 | 24.2 | 18.5 |
2001 | 72.6 | 51.1 | 82.4 | 25.5 | 28.5 | 25.9 |
2002 | NA | NA | NA | 41.8 | 37.1 | 41.8 |
2003 | NA | NA | NA | 15.4 | 10.2 | 15.3 |
