Table 2.
Cannabis Use Characteristics by Cannabis Use Status, 2009–2018 (4,780, 57.2%)
| Cannabis Use | No History of Monthly Use (n=2,560, 32.3%) |
History of Monthly Use (n=2,220, 24.9%) |
|---|---|---|
| Years of monthly use prior to MI, n (%) | ||
| < 5 yrs. | NA | 399 (21.0) |
| 5 to 10 yrs. | NA | 365 (18.6) |
| > 10 yrs. | NA | 1456 (60.4) |
| Years of monthly use prior to MI, mean (SE) | 0 (0.0) | 16.5 (0.4) |
| Onset of use, mean (SE) | ||
| Age of first use | 18.9 (0.1) | 16.0 (0.1) |
| Age started monthly use | NA | 18.7 (0.2) |
| Recency of use, n (%) | ||
| Past month | 162 (5.1) | 866 (37.5) |
| > Past month | 2398 (94.9) | 1354 (62.5) |
| Frequency of Recent Use | ||
| Days of use, past month, mean (SE) | 3.0 (0.3) | 15.3 (0.6) |
| Days of use, past month, n (%) | ||
| Light (< 10 days/past mo.) | 144 (91.8) | 380 (41.1) |
| Moderate (10-20 days /past mo.) | 15 (7.0) | 175 (19.8) |
| Heavy (> 20 days/past mo.) | 3 (1.2) | 311 (39.1) |
Notes: Subgroup sizes represent unweighted frequencies. All other numbers are weighted column percentages, means (with standard errors) or medians (with IQR). Cannabis use variables are all standard NHANES variables, other than “Years of monthly use prior to MI”, which is a calculation.