Table 1.
Demographic and use characteristics
| Demographic Characteristics | All Participants (n=277) | NAC (n=142) | Placebo (n=135) |
|---|---|---|---|
| Gender, male, % (n) | 72.2 (200) | 77.5 (110) | 66.7 (90) |
| Age (years) at Randomization, mean (SD) | 30.3 (9.0) | 29.8 (8.8) | 30.8 (9.2) |
| Race | |||
| Caucasian | 57.8 (160) | 54.9 (78) | 60.7 (82) |
| African American | 28.2 (78) | 28.2 (40) | 28.2 (38) |
| Other | 14.1 (39) | 16.9 (24) | 10.6 (15) |
| Baseline Use Characteristics | |||
|
|
|||
| Age at First Alcohol Use* | 16.7 (2.9) | 16.7 (3.0) | 16.7 (2.9) |
| Lifetime history of Alcohol Use % (n) | 98.6 (273) | 100.0 (142) | 97.0 (131) |
| Any Alcohol Use 30 Days Prior to Study % (n) | 74.7 (207) | 75.4 (107) | 74.1 (100) |
| Lifetime Alcohol Abuse % (n) | 22.7 (63) | 22.5 (32) | 22.9 (31) |
| Full Sample: # of Drinks 30 Days Prior to Study | 17.8 (28.4) | 17.6 (29.5) | 18.1 (27.3) |
| Full Sample: # of Drinking Days 30 Days Prior to Study | 4.7 (6.2) | 4.2 (5.8) | 5.1 (6.6) |
| Full Sample: # of Binge Drinking Days 30 Days Prior to Study | 0.3 (1.4) | 0.1 (0.6) | 0.5 (1.9) |
| Baseline Drinkers: # of Drinks 30 Days Prior to Study† | 23.9 (30.6) | 23.3 (32.0) | 24.5 (29.2) |
| Baseline Drinkers: # of Drinking Days 30 Days Prior to Study† | 6.2 (6.4) | 5.6 (6.1) | 6.9 (6.8) |
| Baseline Drinkers: # of Binge Drinking Days 30 Days Prior to Study† | 0.4 (1.6) | 0.2 (0.7) | 0.6 (2.2) |
| Cannabis Use Days 30 Days Prior to Study | 26.0 (6.2) | 26.2 (5.8) | 25.9 (6.6) |
| Cannabis Use Grams 30 Days Prior to Study+ | 69.2 (97.9) | 65.5 (83.3) | 73.0 (111.3) |
| Smokes Cigarettes % (n) | 37.6 (104) | 39.4 (56) | 35.6 (48) |
Note: There were no significant baseline differences between groups with respect to demographics or substance use characteristics.
*
273 of 277 participants reported any prior lifetime alcohol use.
+
N=275 (2 participants did not have cannabis gram data)
†
Baseline drinkers noted as participants reporting any drinks in the past 30 days at study randomization (n=207).