Table 1.
Reasons for marijuana use, marijuana use event characteristics, and individual characteristics, total and by reason changed following the marijuana use event
| Characteristic | Total Events N |
Reason Changed n (%) |
β (SE) | OR (95% CI) | p |
|---|---|---|---|---|---|
| Reason about to use marijuana | 263 | 53 (20%) | |||
| Type of reason | |||||
| For pleasure | 162 | 17 (10%) | −1.55 (0.33) | 0.21 (0.11–0.41) | <0.0001 |
| To cope | 42 | 9 (21%) | −0.16 (0.45) | 0.86 (0.35–2.08) | 0.73 |
| To be more social | 34 | 12 (35%) | 0.90 (0.41) | 2.47 (1.11–5.50) | 0.03 |
| To expand my mind | 22 | 12 (55%) | 1.76 (0.47) | 5.84 (2.32–14.7) | 0.0002 |
| To conform | 3 | 3 (100%) | - | - | - |
| Valence of reason | |||||
| Negative | 45 | 12 (27%) | 0.38 (0.39) | 1.47 (0.68–3.17) | 0.33 |
| Positive | 218 | 41 (19%) | |||
| Locus of reason | |||||
| External | 37 | 15 (41%) | 1.22 (0.39) | 3.39 (1.57–7.30) | 0.002 |
| Internal | 226 | 38 (17%) | |||
| Marijuana use event | |||||
| Companionship | 0.18 | ||||
| Alone | 65 | 12 (18%) | −0.79 (0.50) | 0.45 (0.17–1.21) | 0.11 |
| Friends | 132 | 23 (17%) | −0.77 (0.45) | 0.46 (0.19–1.12) | 0.09 |
| Other people (referent) | 37 | 11 (30%) | |||
| Location | 0.92 | ||||
| Home (referent) | 133 | 26 (20%) | |||
| Friend’s house | 59 | 11 (19%) | 0.02 (0.41) | 1.02 (0.43–2.29) | 0.96 |
| Other place | 42 | 9 (21%) | 0.18 (0.44) | 1.19 (0.50–2.86) | 0.69 |
| Time of day | 0.13 | ||||
| Afternoon | 80 | 13 (16%) | −0.63 (0.66) | 0.53 (0.14–1.95) | 0.34 |
| Evening | 103 | 17 (17%) | −0.61 (0.64) | 0.54 (0.1–1.80) | 0.34 |
| Early morning | 36 | 12 (33%) | 0.31 (0.68) | 1.36 (0.35–5.25) | 0.65 |
| Morning (referent) | 15 | 4 (27%) | |||
| Time of week | |||||
| Weekend | 85 | 22 (26%) | 0.60 (0.33) | 1.82 (0.94–3.52) | 0.08 |
| Weekday | 149 | 24 (16%) | |||
| Way marijuana used | 0.39 | ||||
| Blunt | 142 | 27 (19%) | 0.39 (0.60) | 1.48 (0.45–4.83) | 0.51 |
| Bong | 38 | 8 (21%) | 0.75 (0.70) | 2.13 (0.53–8.47) | 0.28 |
| Pipe (referent) | 31 | 4 (13%) | |||
| Other | 23 | 7 (30%) | 1.12 (0.72) | 3.05 (0.74–12.6) | 0.12 |
| Dose of marijuana | |||||
| 1–5 hits | 43 | 10 (23%) | |||
| 6 or more hits | 191 | 36 (19%) | −0.29 (0.31) | 0.75 (0.33–1.70) | 0.49 |
| Level of high (0–8 scale) | |||||
| Median or below (0–5) | 138 | 30 (22%) | |||
| Above median (6–8) | 95 | 15 (16%) | 0.49 (0.36) | 1.61 (0.79–3.30) | 0.19 |
| Individual | |||||
| Age | |||||
| 15–19 years | 165 | 24 (15%) | |||
| 20–24 years | 98 | 29 (30%) | 0.90 (0.31) | 2.47 (1.33–4.47) | 0.001 |
| Gender | |||||
| Female | 168 | 29 (17%) | 0.15 | ||
| Male | 95 | 24 (25%) | 0.46 (0.32) | 1.59 (0.85–2.98) | |
| Average weekly marijuana use | |||||
| 2–7 times | 131 | 27 (21%) | |||
| 8 or more | 132 | 26 (20%) | −0.09 (0.35) | 0.91 (0.46–1.81) | 0.79 |
| Mental health | |||||
| Good | 203 | 43 (21%) | |||
| Poor | 60 | 10 (17%) | −0.29 (0.41) | 0.75 (0.33–1.69) | 0.49 |
| Cannabis dependence | |||||
| No | 88 | 21 (24%) | |||
| Yes | 169 | 29 (17%) | −0.49 (0.33) | 0.68 (0.35–1.32) | 0.26 |
Note. N = 233–263 marijuana use events, owing to missing data. 36 participants contributed events. SE = standard error. OR = odds ratio. CI = confidence interval. Negative reason for marijuana use defined as to cope or to conform. External reason for marijuana use defined as to be more social or to conform. Mental health categories determined on latent class analysis of responses to validated scales assessing depressive symptoms, state and trait anxiety, social anxiety, and positive and negative affect.