Table 2 Cannabis use characteristics, problematic use indicators, quitting-related factors, and mental health among US young adults reporting past 30-day cannabis use, overall and by cannabis use class (N = 1,968)
| Â | Any past-month use | Infrequent-herb/edibles | Frequent-herb | Moderate-herb | Moderate-oil/other | Â |
|---|---|---|---|---|---|---|
N = 1,968 (100%) | N = 815 (41.4%) | N = 330 (16.8%) | N = 552 (28.0%) | N = 271 (13.8%) |  | |
Variables | N (%) or M (SD) | N (%) or M (SD) | N (%) or M (SD) | N (%) or M (SD) | N (%) or M (SD) | p-value |
Cannabis use characteristics | ||||||
Number of days used in the past 30 days, M (SD) | 14.19 (11.30) | 4.52 (4.87) | 29.22 (1.88) | 18.73 (8.89) | 15.75 (9.51) | < .001 |
 1–5 days, n (%) | 708 (36.0) | 642 (78.8) | 0 (0) | 26 (4.7) | 40 (14.8) |  |
 6–20 days | 625 (31.8) | 166 (20.4) | 0 (0) | 305 (55.3) | 154 (56.8) |  |
 ≥ 21 days | 635 (32.3) | 7 (0.9) | 330 (100) | 221 (40.0) | 77 (28.4) |  |
Average number of time used per day, M (SD) | 4.47 (6.22) | 1.90 (5.96) | 10.01 (8.17) | 4.05 (2.90) | 6.32 (3.90) | < .001 |
 1 time/day, n (%) | 546 (27.8) | 524 (64.5) | 0 (0) | 16 (2.9) | 6 (2.2) |  |
 2–4 times/day | 800 (40.8) | 288 (35.5) | 19 (5.8) | 406 (73.6) | 87 (32.1) |  |
 ≥ 5 times/day | 617 (31.4) | 0 (0) | 309 (94.2) | 130 (23.6) | 178 (65.7) |  |
Product type used most often, n (%) * |  |  |  |  |  | < .001 |
 Dried herb | 1102 (56.0) | 325 (39.9) | 246 (74.5) | 531 (96.2) | 0 (0.0) |  |
 Edibles, foods or drinks | 399 (20.3) | 329 (40.4) | 22 (6.7) | 20 (3.6) | 28 (10.3) |  |
 Oils: | 322 (16.5) | 119 (14.7) | 0 (0) | 0 (0) | 203 (75.5) |  |
  Oils or liquids for vaping | 230 (11.7) | 87 (10.7) | 0 (0.0) | 0 (0.0) | 143 (52.8) |  |
  Oils or liquids taken orally | 53 (2.7) | 18 (2.2) | 0 (0.0) | 0 (0.0) | 35 (12.9) |  |
  Tinctures | 39 (2.0) | 14 (1.7) | 0 (0.0) | 0 (0.0) | 25 (9.2) |  |
 Concentrates/other: | 133 (6.8) | 34 (4.2) | 61 (18.5) | 0 (0) | 38 (14.1) |  |
  Concentrates | 68 (3.5) | 10 (1.2) | 41 (12.4) | 0 (0.0) | 17 (6.3) |  |
  Hash or kief | 31 (1.6) | 5 (0.6) | 13 (3.9) | 0 (0.0) | 13 (4.8) |  |
  Topical ointments | 34 (1.7) | 19 (2.3) | 7 (2.1) | 0 (0.0) | 8 (3.0) |  |
Medical cannabis card, n (%) £ |  |  |  |  |  | < .001 |
 No | 1590 (80.8) | 695 (85.3) | 256 (77.6) | 458 (83.0) | 181 (66.8) |  |
 Yes | 309 (15.7) | 84 (10.3) | 69 (20.9) | 75 (13.6) | 81 (26.2) |  |
Prefer not to answer | 69 (3.5) | 36 (4.4) | 5 (1.5) | 19 (3.4) | 9 (3.3) | Â |
Use for medical or recreational purposes, n (%) & |  |  |  |  |  | < .001 |
 Only medical | 166 (8.4) | 74 (9.1) | 22 (6.7) | 30 (5.4) | 40 (14.8) |  |
 Primarily medical but occasionally recreational | 482 (24.5) | 138 (16.9) | 108 (32.7) | 149 (27.0) | 87 (32.1) |  |
 Primarily recreational but occasionally medical | 625 (31.8) | 183 (22.5) | 142 (43.0) | 219 (39.7) | 81 (29.9) |  |
 Only recreational | 588 (29.9) | 355 (43.6) | 50 (8.5) | 128 (23.2) | 55 (20.3) |  |
Problematic use indicators | ||||||
Problematic use score, M (SD) # | 1.99 (0.86) | 2.04 (0.80) | 1.67 (0.77) | 1.91 (0.81) | 2.36 (1.04) | < .001 |
Driving after cannabis use, n (%) | 686 (35.3) | 140 (7.2) | 165 (51.6) | 247 (45.3) | 134 (50.2) | < .001 |
Driving after cannabis/alcohol co-use, n (%) | 279 (14.3) | 55 (6.8) | 55 (16.8) | 74 (13.5) | 95 (35.3) | < .001 |
Quitting-related factors | ||||||
Importance of quitting, M (SD) ^ | 2.20 (2.99) | 2.17 (3.02) | 1.62 (2.87) | 2.21 (2.89) | 2.99 (3.10) | < .001 |
Confidence to quit, M (SD) ^ | 7.48 (3.29) | 8.16 (3.03) | 6.61 (3.70) | 7.59 (3.03) | 6.27 (3.41) | < .001 |
Mental health (per PHQ-4), M (SD) | 4.23 (3.28) | 3.78 (3.27) | 4.40 (3.78) | 4.30 (3.46) | 5.28 (3.50) | < .001 |