Table 1.
Summary statistics of sample for cannabis use traits
| Users | Non-users | |
|---|---|---|
| N | 1,011 | 1,071 |
| Mean age (SE) | 41.3 (.23) | 53.0 (.37) |
| Percentage female (%) | 46.5 | 56.0 |
| Mean age at initiation (SE) | 19. 6 (.06) | - |
| Mean number of uses over life (SE) | 62.7(4.56) | - |
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