Table 2.
Effects of concurrent and lagged cannabis and alcohol use on impulsivity, hostility, and positive affect.
| Impulsivity | Hostility | Positive Affect | ||||
|---|---|---|---|---|---|---|
| Effect | Estimate | 95% CI | Estimate | 95% CI | Estimate | 95% CI |
| Intercept | 5.80*** | [5.33, 6.28] | 1.49*** | [1.33, 1.64] | 2.33*** | [2.16, 2.50] |
| Occasion level | ||||||
| Current occasion cannabis use | 0.35† | [0.00, 0.70] | 0.07* | [0.01, 0.12] | 0.02 | [−0.11, 0.15] |
| Previous occasion cannabis use | −0.21† | [−0.42, 0.01] | −0.06* | [−0.12, −0.01] | 0.02 | [−0.05, 0.09] |
| Current occasion alcohol use | 0.42** | [0.13, 0.71] | 0.00 | [−0.04, 0.04] | 0.12*** | [0.06, 0.18] |
| Previous occasion alcohol use | 0.09 | [−0.12, 0.30] | 0.02 | [−0.03, 0.06] | −0.07* | [−0.14, −0.01] |
| Day level | ||||||
| Current day cannabis use | 0.83* | [0.17, 1.49] | 0.22† | [−0.02, 0.46] | 0.11 | [−0.21, 0.43] |
| Previous day cannabis use | −0.31 | [−1.10, 0.49] | −0.07 | [−0.33, 0.18] | 0.11 | [−0.16, 0.39] |
| Current day alcohol use | 0.82** | [0.22, 1.41] | 0.00 | [−0.14, 0.14] | 0.33*** | [0.16, 0.49] |
| Previous day alcohol use | −0.02 | [−0.48, 0.44] | 0.15† | [−0.03, 0.32] | −0.17* | [−0.33, −0.02] |
| Person level | ||||||
| Degree of cannabis use | −0.05 | [−1.96, 1.86] | 0.81* | [0.15, 1.47] | 0.58 | [−0.15, 1.32] |
| Degree of alcohol use | −1.26 | [−5.05, 2.54] | −0.06 | [−1.25, 1.13] | 0.41 | [−0.90, 1.73] |
| Covariates | ||||||
| Group (DD = −1, BPD = 1) | 0.29 | [−0.42, 1.00] | 0.15 | [−0.08, 0.39] | −0.12 | [−0.38, 0.14] |
| Sex (female = −1, male = 1) | −0.55 | [−1.49, 0.39] | 0.14 | [−0.16, 0.44] | 0.36* | [0.03, 0.70] |
| Age | −0.02 | [−0.05, 0.01] | 0.01 | [0.00, 0.01] | 0.01* | [0.00, 0.02] |
| First daily measurement | −0.16*** | [−0.24, −0.07] | −0.03** | [−0.05, −0.01] | −0.16*** | [−0.19, −0.14] |
| Weekday (Saturday is reference) | ||||||
| Sunday | −0.13 | [−0.32, 0.07] | −0.04 | [−0.10, 0.02] | 0.00 | [−0.06, 0.07] |
| Monday | −0.33*** | [−0.53, −0.13] | −0.04 | [−0.10, 0.02] | −0.08* | [−0.14, −0.02] |
| Tuesday | −0.12 | [−0.32, 0.07] | 0.04 | [−0.02, 0.10] | 0.01 | [−0.05, 0.07] |
| Wednesday | −0.11 | [−0.30, 0.08] | 0.00 | [−0.06, 0.06] | 0.02 | [−0.04, 0.08] |
| Thursday | −0.10 | [−0.30, 0.09] | 0.01 | [−0.05, 0.07] | 0.01 | [−0.05, 0.08] |
| Friday | −0.05 | [−0.24, 0.15] | 0.01 | [−0.05, 0.07] | −0.01 | [−0.08, 0.05] |
Note. 95% CI = 95% confidence interval. Bold-type values are estimates relating to the primary hypotheses that are still statistically significant after a Benjamini and Hochberg (1995) adjustment on the effects of each substance.
†
p < .10,
*
p < .05,
**
p < .01,
***
p < .001