Table 1.
Descriptive characteristics of the four study groupsa
| Variable | Younger Controls (N=58) |
Older Controls (N=29) |
Younger Alcoholics (N=123) |
Older Alcoholics (N=16) |
|---|---|---|---|---|
| Age (yr) | 38.4 (8.5) | 64.5 (6.1) | 37.7 (7.9) | 64.2 (6.1) |
| Years of heavy drinking | 0.0 | 0.0 | 11.5 (8.4) | 13.9 (16.5) |
| Males (%) | 67.2 | 62.1 | 84.6 | 87.5 |
| Race/Ethnicity | ||||
| Black (%) | 0.0 | 0.0 | 15.4 | 18.8 |
| White (%) | 94.8 | 96.6 | 82.1 | 81.3 |
| Other (%) | 5.2 | 3.4 | 2.4 | 0.0 |
| Body Mass Index | 24.6 (3.5) | 26.8 (5.0) | 25.6 (4.1) | 25.4 (5.2) |
| SDQ Psychiatric Scale (percentile) | 11.8 (9.6) | 10.1 (10.3) | 29.5 (18.2) | 29.1 (20.8) |
| Current Cigarette Smokers (%) | 1.7 | 3.4 | 81.3 | 93.8 |
a
Continuous variables are expressed as means (S.D.).
Note: SDQ = Sleep Disorders Questionnaire (Douglass et al., 1994)