Table 1.
Sample characteristics, by marijuana exposure opportunity; and by marijuana initiation, given opportunity
| Sample A: Students with no prior marijuana use |
Sample B: Students with no prior use and with marijuana exposure opportunity during college |
|||||
|---|---|---|---|---|---|---|
| No opportunity to use marijuana (n=95) | Opportunity to use marijuana (n=265) | Total (n=360) | No initiation (n=121) | Initiators (n=144) | Total (n=265) | |
| Dependent Variable | ||||||
| Initiated marijuana use during college | ||||||
| Yes: N (%) | 0 (.00) | 144 (54.34)** | 144 (40.00) | -- | -- | 144 (54.3) |
| No: N (%) | 95 (100.00) | 121 (45.66) | 216 (60.00) | -- | -- | 121 (45.7) |
| Hypothesized Predictors | ||||||
| Parental monitoring score: Mean (SD) | 34.13 (6.14) | 31.00 (6.01)** | 31.83 (6.19) | 31.73 (6.44) | 30.40 (5.57) | 31.00 (6.01) |
| Peer marijuana use: Mean % (SD) | 6.32 (10.96) | 35.95 (24.92)** | 28.04 (25.67) | 24.94 (20.68) | 45.31 (24.44)** | 35.95 (24.92) |
| Control Variables | ||||||
| Sex | ||||||
| Male: N (%) | 31 (32.63) | 121 (45.66)* | 152 (42.22) | 49 (40.50) | 72 (50.00) | 121 (45.66) |
| Female: N (%) | 64 (67.37) | 144 (54.34) | 208 (57.78) | 72 (59.50) | 72 (50.00) | 144 (54.34) |
| Race | ||||||
| White: N (%) | 47 (49.47) | 186 (70.19)** | 233 (64.72) | 87 (71.90) | 99 (68.75) | 186 (70.19) |
| Non-white: N (%) | 48 (50.53) | 79 (29.81) | 127 (35.28) | 34 (28.10) | 45 (31.25) | 79 (29.81) |
| Religiosity | ||||||
| Low: N (%) | 29 (30.53) | 114 (43.02)* | 143 (39.72) | 46 (38.02) | 68 (47.22) | 114 (43.02) |
| High: N (%) | 66 (69.47) | 151 (56.98) | 217 (60.28) | 75 (61.98) | 76 (52.78) | 151 (56.98) |
| Family Income:aMean (SD) | 6.57 (2.52) | 6.98 (3.27) | 6.87 (3.09) | 6.61 (3.26) | 7.29 (3.25) | 6.98 (3.27) |
| Sensation-seeking score: Mean (SD) | 2.23 (1.84) | 2.98 (2.09)** | 2.78 (2.05) | 2.53 (1.99) | 3.35 (2.11)** | 2.98 (2.09) |
a
The mean adjusted gross income reported by the Internal Revenue Service for each participant's home ZIP code during their last year in high school, measured in ten thousands.
*
p≤.05
**
p≤.01