Table 1. Demographics of the population of children with an ADHD diagnosis, by ASD diagnosis status.
| ADHD + ASD (n=352) % (SE) |
ADHD, no ASD (n=2,112) % (SE) |
χ2 value |
p-value | |
|---|---|---|---|---|
|
| ||||
| Child characteristics | ||||
|
| ||||
| Age group (%) | 11.89*** | <.001 | ||
| 4-11 | 49.2 (4.9) | 31.9 (1.8) | ||
| 12-17 | 50.8 (4.9) | 68.1 (1.8) | ||
|
| ||||
| Male (%) | 78.3 (3.7) | 69.6 (1.8) | 3.88* | .04 |
|
| ||||
| Race/ethnicity (%) | 0.15 | .93 | ||
| Non-Hispanic white | 65.2 (4.9) | 62.8 (1.9) | ||
| Non-Hispanic black | 14.1 (3.5) | 14.9 (1.5) | ||
| Non-Hispanic other | 7.3 (2.4) | 6.6 (0.8) | ||
| Hispanic | 13.5 (3.8) | 15.7 (1.6) | ||
|
| ||||
| Insurance type (%) | 1.04 | .34 | ||
| Public | 54.3 (4.9) | 48.6 (1.9) | ||
| Private | 44.8 (4.9) | 49.6 (1.9) | ||
| Uninsured | 0.9 (0.5) | 1.8 (0.5) | ||
|
| ||||
| Household characteristics | ||||
|
| ||||
| Region (%) | 0.62 | .60 | ||
| Northeast | 18.2 (3.6) | 15.1 (1.1) | ||
| Midwest | 25.6 (4.0) | 22.0 (1.2) | ||
| South | 40.8 (4.7) | 44.4 (1.5) | ||
| West | 15.4 (3.3) | 18.5 (1.1) | ||
|
| ||||
| Federal poverty level (%) | 0.74 | .53 | ||
| <100% | 26.0 (4.7) | 28.0 (1.9) | ||
| 100% - 199% | 19.9 (4.1) | 22.8 (1.7) | ||
| 200% - 399% | 25.6 (3.9) | 27.4 (1.7) | ||
| ≥400% | 28.5 (4.5) | 21.9 (1.4) | ||
|
| ||||
| Highest education individual (%) | 2.18 | .11 | ||
| Less than high school | 15.8 (3.8) | 18.6 (1.7) | ||
| High school | 28.5 (4.2) | 36.8 (1.9) | ||
| More than high school | 55.6 (4.9) | 44.6 (1.9) | ||
|
| ||||
| Household type (%) | 1.05 | .31 | ||
| Two parent household | 66.8 (4.7) | 61.4 (1.9) | ||
| Other | 33.2 (4.7) | 38.6 (1.9) | ||
|
| ||||
| Housing situation (%) | 0.15 | .84 | ||
| Own | 58.4 (5.0) | 58.4 (2.0) | ||
| Rent | 40.2 (5.1) | 39.4 (2.0) | ||
| Other | 1.4 (0.8) | 2.2 (0.6) | ||
***
p<.001
**
p<.01
*
p<.05
NOTES: ADHD = attention-deficit/hyperactivity disorder; ASD = autism spectrum disorder SE = standard error