Table 2.
Cannabis use prevalence and patterns among; 1) all survey respondents providing sufficient cannabis use data (n=1033), 2) patients endorsing use of cannabis since their cancer diagnosis (n=293), and 3) patients endorsing current cannabis use (n=168).
| All respondents (n=1033) | Respondents (n) | Weighted % (95% CI) |
|---|---|---|
| Ever used cannabis (before dx) | 545 | 49.6 (48.8 – 50.3) |
| Used cannabis since dx | 293 | 25.9 (25.3 – 26.6) |
| Considered using cannabis (among those not having used it since dx; n=740) | 137 | 16.6 (16.0 – 17.3) |
| Currently using cannabis | 168 | 14.7 (14.2 – 15.2) |
| Used cannabis since dx (n=293) | Respondents (n) | Weighted % (95% CI) |
| Used during cancer treatment (n=283) | 170 | 59.8 (58.4 – 61.2) |
| Freq of use during treatment (n=170) | ||
| 1+ time per day | 20 | 12.3 (11.1 – 13.7) |
| 1x per day or almost every day | 54 | 30.1 (28.4 – 31.8) |
| Few times a week | 37 | 24.2 (22.5 – 26.0) |
| Few times a month | 34 | 18.6 (17.2 – 20.0) |
| Once a month or less | 8 | 5.6 (4.7 – 6.7) |
| A few times | 17 | 9.2 (8.2 – 10.4) |
| Used cannabis after treatment (n=249) | 191 | 64.2 (62.8 – 65.5) |
| Freq of use after treatment (n=191) | ||
| 1+ time per day | 16 | 8.0 (7.1 – 8.9) |
| 1x per day or almost every day | 46 | 23.0 (21.5 – 24.5) |
| Few times a week | 35 | 20.6 (19.1 – 22.2) |
| Few times a month | 29 | 14.2 (13.0 – 15.5) |
| Once a month or less | 27 | 12.5 (11.5 – 13.7) |
| A few times | 36 | 20.3 (18.9 – 21.8) |
| Days of use (past 30) – mean (SD) | 17.1 (11.2) | -- |
| Reasons for use since dx | ||
| Medical | 126 | 43.8 (42.3 – 45.2) |
| Non-medical | 54 | 19.6 (18.5 – 20.8) |
| Both medical and non-medical | 108 | 36.6 (35.2 – 38.0) |
| THC:CBD content | ||
| Higher THC and lower CBD | 74 | 25.9 (24.7 – 27.2) |
| Higher CBD and lower THC | 36 | 10.8 (10.0 – 11.7) |
| Equal THC to CBD | 30 | 11.2 (10.3 – 12.2) |
| CBD only | 48 | 15.4 (14.4 – 16.4) |
| Don’t know | 100 | 36.7 (35.3 – 38.1) |
| Methods of cannabis used* | ||
| Smoking | 151 | 52.5 (51.1 – 53.9) |
| Eating | 159 | 52.9 (51.5 – 54.3) |
| Drinking | 15 | 5.5 (4.9 – 6.2) |
| By mouth (pills, tinctures, sublingually) | 85 | 26.6 (25.4 – 27.9) |
| Vaping (e-cigarette like vaporizer) | 55 | 18.2 (17.1 – 19.3) |
| Dabbing (waxes or shatter) | 17 | 5.0 (4.4 – 5.5) |
| Applying (lotion, cream, topical)‡ | 76 | 23.7 (22.5 – 24.9) |
| Cannabis methods used – mean (SD) | 1.9 (1.2) | -- |
| Primary method of cannabis use | ||
| Smoking | 98 | 37.8 (36.4 – 39.3) |
| Eating | 80 | 27.0 (25.8 – 28.3) |
| Drinking | 4 | 1.2 (1.0 – 1.6) |
| By mouth | 49 | 15.8 (14.9 – 16.9) |
| Vaping | 20 | 6.7 (6.0 – 7.4) |
| Dabbing | 1 | 0.3 (0.2 – 0.4) |
| Applying | 36 | 11.2 (10.3 – 12.1) |
| Currently using cannabis (n=168) | Respondents (n) | Weighted % (95% CI) |
| Freq of past 30-day use | ||
| 1+ time per day | 24 | 15.0 (13.7 – 16.5) |
| 1x per day or almost every day | 51 | 28.3 (26.7 – 30.0) |
| Few times a week | 44 | 27.8 (26.1 – 29.6) |
| Few times a month | 28 | 17.3 (15.8 – 18.8) |
| Once a month or less | 14 | 7.0 (6.2 – 7.9) |
| Only tried it once or twice | 6 | 4.1 (3.4 – 5.0) |
| Times used per day† | ||
| 1 | 101 | 57.3 (55.4 – 59.2) |
| 2 | 44 | 29.0 (27.2 – 30.8) |
| 3–4 | 17 | 9.9 (8.8 – 11.1) |
| 5–9 | 3 | 2.0 (1.5 – 2.7) |
| 20 or more | 2 | 1.8 (1.3 – 2.6) |
| Reasons for use in the past 30 days | ||
| Medical | 58 | 33.5 (31.7 – 35.2) |
| Non-medical | 29 | 17.8 (16.3 – 19.3) |
| Both medical and non-medical | 80 | 48.8 (46.9 – 50.7) |
| Interest in quitting cannabis – mean (SD) | 1.8 (1.9) | -- |
| Interest in reducing cannabis – mean (SD) | 1.9 (2.0) | -- |
Notes: 3 respondents did not answer cannabis items and were excluded from estimates above (n=1033). Current cannabis use was defined as either answering yes to a current cannabis use item (n=148) OR use within the past 30 days (n=165). Quit/reduction interest questions were on a 1–10 scale (1=not at all interested; 10=extremely interested). Abbreviations: CI Confidence Interval; dx=cancer diagnosis; THC= tetrahydrocannabinol; CBD= cannabidiol;
Check all that apply.
Suppositories were re-categorized into “Apply” when endorsed.
Options 10–14 and 15–19 times a day were not endorsed and are not shown here. p-values are from weight-adjusted Chi-square tests.