Table 2.
Participant characteristics
| sAL (n=7) | nsAL (n=7) | sNA (n=6) | nsNA (n=7) | Significant outcomes where P<0.05 | |
|---|---|---|---|---|---|
| Age (years) | 51.1 ± 11.2 | 52.7 ± 11.2 | 47.0 ± 7.8 | 50.4 ± 9.8 | |
| Gender (women:men) | 3:4 | 3:4 | 2:4 | 3:4 | |
| Education (years) | 13.2 ± 2.6 | 14.6 ± 1.5 | 14.7 ± 3.3 | 14.3 ± 2.1 | |
| WAIS full scale IQ | 99.0 ± 19.8 | 106.4 ± 16.1 | 105.5 ± 14.8 | 112.3 ± 15.4 | |
| Duration of heavy drinking (years) | 14.7 ± 7.0 | 23.4 ± 11.6 | 0 ± 0 | 0 ± 0 |
|
| Average drinks per day | 10.7 ± 5.5 | 14.5 ± 8.6 | 0.4 ± 0.4 | 0.3 ± 0.4 |
|
| Length of sobriety (years) | 3.9 ± 5.0 | 4.2 ± 7.6 | N/A | N/A | |
| Cigarettes per day | 14.4 ± 4.8 | 0 ± 0 | 6.0 ± 5.5 | 0 ± 0 |
|
| Duration of smoking (years)† | 23.4 ± 15.3 | N/A | 14.2 ± 11.8 | N/A | |
| Total brain volume (cm3) | 1,048.6 ± 147.7 | 1,048.8 ± 114.4 | 1,123.9 ± 101.8 | 1,091.6 ± 142.1 | |
| Race (black:white) | 2:5 | 0:7 | 1:6 | 2:4 | |
| Body mass index | 25.7 ± 4.5 | 30.4 ± 8.4 | 24.6 ± 3.7 | 26.7 ± 4.5 |
Notes: All values are listed as mean ± SD.
†
Duration of smoking not available for one sNA participant. In purple: comorbid effects (sAL versus nsNA). In red: smoking effects (sAL versus nsAL or sNA versus nsNA). In blue: alcholism effects (sAL versus sNA or nsAL versus nsNA). In green: cross effects of smoking and alcoholism (sNA versus nsAL).
Abbreviations: IQ, intelligence quotient; nsAL, alcoholic participants – currently not smoking; nsNA, nonalcoholic participants – currently not smoking; sAL, alcoholic participants (the comorbid group); sNA, nonalcoholic participants – current smokers; WAIS, Wechsler Adult Intelligence Scale; SD, standard deviation.