Table 2.
Level of marijuana use and driving under the influence (DUI) of marijuana in the past 30 days in relation to policy, community, interpersonal, and intrapersonal factors among young adult current marijuana users, N=649
| Total Sample |
Number of Days Used in Past 30 |
DUI |
||||
|---|---|---|---|---|---|---|
| No N=335 (51.6%) |
Yes N=314 (48.4%) |
|||||
| N (%) or M (SD) |
M (SD) or r |
p | M (SD) or N (%) |
M (SD) or N (%) |
p | |
| Use Level | ||||||
| Days of marijuana use, past 30 days (SD) | 17.86 (11.29) | -- | -- | 14.62 (11.72) | 21.32 (9.69) | <.001 |
| Number of times used per day (SD) | 6.07 (14.86) | .22 | <.001 | 5.78 (15.60) | 6.37 (14.04) | .62 |
| Symptoms of dependence (SD) a | 13.38 (5.99) | .20 | <.001 | 27.49 (6.06) | 29.70 (5.73) | <.001 |
| State Marijuana Policy (%) | .20 | .06 | ||||
| Illegal | 424 (65.3) | 17.31 (11.33) | 205 (61.2) | 219 (69.7) | ||
| Medical only legal | 181 (27.9) | 18.67 (11.26) | 103 (30.7) | 78 (24.8) | ||
| Medical and recreational legal | 44 (6.8) | 19.80 (10.78) | 27 (8.1) | 17 (2.6) | ||
| Community Factors | ||||||
| Community type (%) | .03 | .39 | ||||
| Urban | 206 (31.7) | 19.56 (10.89) | 104 (31.0) | 102 (32.5) | ||
| Suburban | 265 (40.8) | 17.24 (11.33) | 145 (43.3) | 120 (38.2) | ||
| Rural | 178 (27.4) | 16.81 (11.51) | 86 (25.7) | 92 (29.3) | ||
| Channels of access (%) | <.001 | <.001 | ||||
| Don’t buy; get it from a friend | 193 (29.8) | 11.27 (10.57) | 136 (40.6) | 57 (18.2) | ||
| Buy from someone in my community | 179 (27.6) | 19.82 (9.88) | 62 (18.5) | 117 (37.4) | ||
| Buy from a dealer | 167 (25.8) | 21.04 (10.40) | 67 (20.0) | 100 (31.9) | ||
| Dispensary | 75 (11.6) | 22.47 (10.66) | 44 (13.1) | 31 (9.9) | ||
| Other | 34 (5.2) | 18.82 (12.09) | 26 (7.8) | 8 (2.6) | ||
| Possesses medicinal marijuana card (%) | 70 (10.8) | 24.34 (8.64) | <.001 | 38 (11.3) | 32 (10.2) | .37 |
| vs. no | 579 (89.2) | 17.07 (11.32) | 297 (88.7) | 181 (89.8) | ||
| Interpersonal Factors | ||||||
| Relationship status (%) | .42 | .11 | ||||
| Married or living with partner | 244 (37.6) | 18.32 (11.57) | 134 (40.0) | 110 (35.0) | ||
| Other | 405 (62.4) | 17.58 (11.11) | 201 (60.0) | 204 (65.0) | ||
| Have children (%) | .83 | .46 | ||||
| No | 494 (76.1) | 17.91 (11.33) | 254 (75.8) | 240 (76.4) | ||
| Yes | 155 (23.9) | 17.68 (11.16) | 81 (24.2) | 74 (23.6) | ||
| Parental use (%) | 194 (29.9) | 20.65 (10.67) | <.001 | 99 (29.6) | 95 (30.3) | .46 |
| vs. no | 455 (70.1) | 16.67 (11.34) | 236 (70.4) | 219 (69.7) | ||
| Friend use (SD) | 3.85 (1.36) | .33 | <.001 | 3.65 (1.44) | 4.05 (1.24) | <.001 |
| Intrapersonal Factors | ||||||
| Use Motives (SD) b | ||||||
| Social | 8.32 (5.86) | .20 | <.001 | 7.31 (5.88) | 9.38 (5.65) | <.001 |
| Enhancement | 12.89 (5.37) | .22 | <.001 | 11.70 (5.76) | 14.13 (4.61) | <.001 |
| Conformity | 1.25 (3.19) | -.02 | .62 | 0.95 (2.43) | 1.57 (3.81) | .02 |
| Coping | 8.62 (5.97) | .28 | <.001 | 7.98 (6.06) | 9.28 (5.82) | .006 |
| Expansion | 10.26 (6.97) | .21 | <.001 | 9.19 (7.05) | 11.37 (6.72 | <.001 |
| Risk Perceptions (SD) | ||||||
| Addictiveness c | 2.54 (1.79) | .04 | .27 | 2.51 (1.83) | 2.57 (1.74) | .66 |
| Harm to health c | 2.18 (1.49) | -.18 | <.001 | 2.23 (1.50) | 2.13 (1.48) | .41 |
| I do not worry about getting a DUI after marijuana use d | 3.03 (1.59) | .28 | <.001 | 2.33 (1.43) | 3.58 (1.49) | <.001 |
| I feel completely in control of my driving when I use d | 3.72 (1.48) | .36 | <.001 | 1.51 (0.93) | 3.01) 1.54) | <.001 |
| Other Substance Use, Past 30 Days (%) | ||||||
| Alcohol use | 501 (77.3) | 17.53 (11.23) | .17 | 253 (75.5) | 249 (79.3) | .15 |
| vs. no | 148 (22.7) | 18.98 (11.45) | 82 (24.5) | 65 (20.7) | ||
| Tobacco use | 577 (88.9) | 17.98 (11.37) | .43 | 301 (89.9) | 276 (48.4) | .25 |
| vs. no | 72 (11.1) | 16.86 (10.63) | 34 (10.1) | 38 (12.1) | ||
a
Symptoms of Dependence: On a scale of 7 to 35, with higher scores indicating greater symptoms of dependence.
b
Use Motives: On a scale of 5 to 25, with higher scores indicating greater endorsement of that motive.
c
On a scale of 1=not at all to 7=extremely.
d
On a scale of 1 to 5