Table 2.
Table of demographic information from the full sample on 857 participants with imaging data in the HCP S900 data release. Significant χ2 tests are indicated by an asterisk, reflecting p < 0.05.
| Non-users | Users | χ2 statistic | |
|---|---|---|---|
| Gender | 6.0* | ||
| Female | 27.6% | 28.4% | |
| Male | 18.3% | 25.7% | |
| Ethnicity | 3 | ||
| Hispanic/Latino | 3.1% | 5.2% | |
| Not Hispanic/Latino | 42.1% | 48.6% | |
| Unknown or not reported | 0.6% | 0.3% | |
| Race | 6.6 | ||
| Am. Indian/Alaskan Nat. | 0.1% | 0.1% | |
| Asian/Nat. Hawaiian/other Pacific Is. | 2.3% | 2.9% | |
| Black or African Am. | 6.7% | 9.7% | |
| More than one | 0.8% | 1.5% | |
| Unknown or not reported | 0.3% | 1.3% | |
| White | 35.5% | 38.7% | |
| Education | 10 | ||
| < 12 | 1.0% | 2.6% | |
| 12 | 6.0% | 8.4% | |
| 13 | 2.1% | 3.8% | |
| 14 | 5.6% | 7.1% | |
| 15 | 3.1% | 2.7% | |
| 16 | 20.9% | 21.4% | |
| > 16 | 7.0% | 8.3% | |
| Twin status | 4.2* | ||
| Not twin | 21.3% | 29.0% | |
| Twin | 24.5% | 25.2% |