An attrition analysis of participants not retained by wave 8 (i.e., those who remained in the overall sample but did not use cannabis in the past 90 days, and those lost to follow-up) showed a trend towards a higher prevalence of controlled use indicators compared to the analytical sample at wave 1 ( Supplemental Table 1 ).
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Controlled Use of Cannabis Among Young Adults in Los Angeles Across Changes in Cannabis Policies.
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