Table 1.
Group differences in demographic characteristics between nontreatment-seeking and treatment-seeking research participants with alcohol dependence.
| Primary data set |
Validation data set |
|||||
|---|---|---|---|---|---|---|
| Nontreatment-seeking | Treatment-seeking | p-Value | Nontreatment-seeking | Treatment seeking | p-Value | |
| N | 169 | 609 | 90 | 146 | ||
| Age, years | < 0.001a | |||||
| Mean (SD) | 42.5 (12.2) | 43.1 (10.2) | 38.2 (12.8) | 47.8 (11.1) | ||
| Range | 21.3–65.9 | 19.0–64.4 | 0.570a | 21.1-61.0 | 23.1-68.9 | |
| Education, years | 0.736a | |||||
| Mean (SD) | 13.5 (3.0) | 13.8 (2.7) | 14.3 (3.3) | 13.7 (2.4) | ||
| Range | 2–24 | 1–24 | 0.197 | 2–21 | 7–20 | |
| Intelligence quotient (IQ) | 0.121a | |||||
| Mean (SD) | 91.6 (25.8) | 97.4 (14.8) | 102.1 (19.3) | 97.8 (18.8) | ||
| Range | 58–141 | 57–110 | 0.001 | 56–148 | 55–144 | |
| Gender | 0.275b | |||||
| Female: n (%) | 38 (23%) | 186 (30%) | 0.04b | 32 (36%) | 42 (29%) | |
| Male: n (%) | 131 (77%) | 423 (70%) | 58 (64%) | 104 (69%) | ||
| Race | 0.001b | |||||
| African American: n (%) | 134 (73%) | 237 (39%) | < 0.001b | 58 (64%) | 58 (40%) | |
| Caucasian: n (%) | 34 (20%) | 318 (52%) | 23(26%) | 69 (47%) | ||
| Other: n (%) | 11 (7%) | 54 (9%) | 9 (10%) | 19(13%) | ||
a
Independent samples t-test.
b
Chi-square.