Table 3.
Cannabis practices by wave and by trajectory group among young adult cannabis users in Los Angeles (n = 301)
| Outcomes | Illicit drug use trajectories |
Prescription drug misuse trajectories |
|||
|---|---|---|---|---|---|
| Total |
High illicit drug use trajectory |
Low illicit drug use trajectory |
High Rx drug misuse trajectory |
Low Rx drug misuse trajectory |
|
|
n = 301 |
n = 105 |
n = 196 |
n = 60 |
n = 241 |
|
| % (n) | % (n) | % (n) | % (n) | % (n) | |
| Concentratesa,b | |||||
| Wave 1 | 58.1 (175) | 67.6 (71) | 53.1 (104)* | 70.0 (42) | 55.2 (133)* |
| Wave 2 | 58.8 (170) | 74.5 (76) | 50.3 (94)*** | 81.0 (47) | 53.2 (123)*** |
| Wave 3 | 61.7 (169) | 75.0 (75) | 54.0 (94)** | 72.4 (42) | 58.8 (127) |
| Wave 4 | 54.7 (151) | 70.3 (71) | 45.7 (80)*** | 67.8 (40) | 51.2 (111)* |
| Ediblesa,b | |||||
| Wave 1 | 59.5 (179) | 67.6 (71) | 55.1 (108)* | 71.7 (43) | 56.4 (136)* |
| Wave 2 | 55.7 (161) | 66.7 (68) | 49.7 (93)** | 67.2 (39) | 52.8 (122)* |
| Wave 3 | 59.5 (163) | 69.0 (69) | 54.0 (94)* | 60.3 (35) | 59.3 (128) |
| Wave 4 | 41.7 (115) | 46.5 (47) | 38.9 (68) | 49.2 (29) | 39.6 (86) |
| Cannabis daysc mean (SD) | |||||
| Wave 1 | 69.2 (26.2) | 72.5 (22.2) | 67.4 (28.1) | 75.4 (22.4) | 67.7 (26.9) |
| Wave 2 | 64.7 (30.9) | 67.1 (29.2) | 63.4 (31.8) | 73.4 (25.5) | 62.5 (31.8)* |
| Wave 3 | 60.9 (33.3) | 63.8 (31.6) | 59.3 (34.2) | 65.4 (30.8) | 59.8 (33.9) |
| Wave 4 | 53.8 (36.7) | 59.1 (33.5) | 51.0 (38.2) | 60.0 (35.3) | 52.2 (37.0) |
| MCP statusb | |||||
| Wave 1 | 59.5 (179) | 62.9 (66) | 57.7 (113) | 63.3 (38) | 58.5 (141) |
| Wave 2 | 53.2 (160) | 53.3 (56) | 53.1 (104) | 58.3 (35) | 51.9 (125) |
| Wave 3 | 50.8 (153) | 50.5 (53) | 51.0 (100) | 48.3 (29) | 51.5 (124) |
| Wave 4 | 38.2 (115) | 38.1 (40) | 38.3 (75) | 38.3 (23) | 38.2 (92) |
| Self-reported medical cannabis usea,b | |||||
| Wave 1 | 58.1 (175) | 49.5 (52) | 62.8 (123)* | 51.7 (31) | 59.8 (144) |
| Wave 2 | 54.3 (157) | 42.2 (43) | 61.0 (114)** | 53.4 (31) | 54.5 (126) |
| Wave 3 | 59.5 (163) | 54.0 (54) | 62.6 (109) | 56.9 (33) | 60.2 (130) |
| Wave 4 | 60.5 (155) | 51.0 (50) | 66.5 (105)* | 61.8 (34) | 60.2 (121) |
| Severity of Dependence Scalea,c mean (SD) | |||||
| Wave 1 | 2.5 (2.7) | 2.7 (2.9) | 2.4 (2.7) | 2.7 (2.9) | 2.5 (2.7) |
| Wave 2 | 2.7 (2.6) | 2.9 (2.7) | 2.6 (2.6) | 2.7 (2.4) | 2.7 (2.7) |
| Wave 3 | 2.8 (2.8) | 2.7 (2.6) | 2.8 (2.9) | 2.7 (2.5) | 2.8 (2.9) |
| Wave 4 | 2.9 (3.0) | 2.8 (2.9) | 3.0 (3.0) | 2.5 (2.7) | 3.0 (3.1) |
*
P < 0.05.
**
P < 0.01.
***
P < 0.001.
a
Only those who reported cannabis use in the past 90 days were included in denominator.
b
χ2 test.
c
Kruskal-Wallis test.