Table 2 Sample Characteristics by ASD Affected or Unaffected status (N = 770)
Characteristic variable | ASD (n = 610) # (%) | Unaffected siblings (n = 160) # (%) | F or χ2; p |
|---|---|---|---|
Gender | |||
Male | 477 (78.1) | 73 (44.2) | χ2(1) = 61.08; <0.0001 |
Female | 134 (21.9) | 92 (55.8) | |
Mean age (yr.) at AGRE medical assessment | 8.34 (SE 0.16) | 9.01 (SE 0.35) | F(1) = 1.35; 0.25 |
aRace | |||
White | 487 (79.7) | 135 (81.8) | χ2(2) = 1.11; 0.57 |
Asian | 26 (4.3) | 8 (4.9) | |
Other race, multiple race, or unknown | 98 (16.0) | 22 (13.3) | |
aEthnicity | |||
Hispanic or Latino | 115 (18.8) | 34 (20.6) | χ2(2) = 0.40; 0.82 |
Not Hispanic or Latino | 474 (77.6) | 126 (76.4) | |
Unknown | 22 (3.6) | 5 (3.0) | |
Maternal education | |||
≤ High school | 53 (9.2) | 13 (8.1) | χ2(2) = 1.03; 0.60 |
Some college or graduated from college | 392 (68.8) | 115 (71.9) | |
Some grad school or completed grad school | 133 (18.0) | 32 (20.0) | |
Paternal education | |||
≤ High school | 75 (13.2) | 27 (16.9) | χ2(2) = 1.81; 0.40 |
Some college or graduated from college | 332 (58.3) | 93 (58.1) | |
Some grad school or completed grad school | 162 (28.5) | 40 (25.0) | |