Table 1.
Demographic characteristics of CHARGE cases with autism and controls with typical development (n = 563).
| Demographic variable | Percent (n)
|
Chi-square p-value | |
|---|---|---|---|
| Cases (n = 304) | Controls (n = 259) | ||
| Male sex | 87 (263) | 81 (211) | 0.10 |
| Child race/ethnicity | 0.21 | ||
| White | 51 (154) | 51 (131) | |
| Hispanic | 29 (88) | 30 (77) | |
| Black | 3 (8) | 2 (5) | |
| Asian | 7 (21) | 3 (8) | |
| Othera | 11 (33) | 15 (38) | |
| Maximum education in home | 0.88 | ||
| High school or less | 7 (22) | 8 (22) | |
| Some college | 31 (95) | 31 (79) | |
| Bachelor degree | 35 (107) | 36 (93) | |
| Graduate or professional degree | 26 (80) | 25 (65) | |
| Maternal smoking during pregnancyb | 9 (27) | 7 (18) | 0.40 |
| Maternal age ≥ 35 years | 28 (85) | 25 (65) | 0.44 |
| Preterm delivery (< 259 days)c | 11 (32) | 10 (25) | 0.73 |
a
“Other” refers to mixed race/ethnicity or other reported race/ethnicity, including Native American, Indian, East Indian, Cuban, or Mexican American.
b
Mother reported smoking at any time during pregnancy.
c
Equivalent to 37 completed weeks.