Table 2.
Marijuana use characteristics among former and current users.a
| Former users (n=2,969) | Current users (n=695) | p-value | |
|---|---|---|---|
| Use prior to the past 12 months | |||
| Age at first use [in years; mean (SD)] | 19.5 (6.3) | 19.0 (8.1) | 0.154 |
| Age when began using marijuana most [in years; mean (SD)] | 21.2 (7.2) | 19.0 (8.1) | <0.001 |
| Frequency of most use (%) | <0.001 | ||
| 1–11 times in a year | 35.2 | 6.8 | |
| 1–3 times a month | 17.6 | 8.8 | |
| 1–4 times a week | 25.8 | 27.1 | |
| Every day or nearly every day | 20.7 | 56.4 | |
| Duration used marijuana the most [in weeks, median (IQR)] | 156.0 (260.0) | 364.0 (1300) | <0.001 |
| Number of joints usually smoked in a day when using marijuana the most [mean (SD)] | 1.9 (2.5) | 3.2 (4.0) | <0.001 |
| Use within the past 12 months | |||
| Frequency of use in the last 12 months (%) | |||
| 1–11 times in the last year | − | 33.8 | |
| 1–3 times a month | − | 18.2 | |
| 1–4 times a week | − | 21.6 | |
| Every day or nearly every day | − | 26.0 | |
| Number of days since most recent marijuana use [Median (IQR)] | − | 7.0 (29.0) | |
| Number of joints usually smoked in a day in the last 12 months [mean (SD)] | − | 1.7 (1.8) | |
| Met criteria for CUD (%) | − | 17.5 |
a
Results are weighted and account for the complex survey design of the NESARC-III, precluding the report of raw numbers. Percentages have been rounded and may not total 100.0%.