Table 1.
Rate Ratios (95% CIs) for Association Between Juvenile Cannabis Allegations and Adult Cannabis Legalization
| Variable | Rate ratio (95% CI) among all youth (age 10–17 years)a | Rate ratio (95% CI) among youth reporting cannabis use (age 10–17 years)b |
|---|---|---|
| Legalization of adult possession (July 2015) | 1.28 (1.14, 1.44) | 1.32 (1.18, 1.48) |
| Time trend before legalization (in months) | 0.99 (0.98, 0.99) | 0.99 (0.99, 0.99) |
| Change in time trend after legalization (in months) | 1.01 (1.01, 1.02) | 1.01 (1.00, 1.01) |
The negative binomial models included an offset for age, gender, and race/ethnicity-specific annual population estimates. The model was adjusted for age (RR: 4.20 [95% CI: 3.96, 4.45] 15‒ 17 years vs 10‒14 years), race/ethnicity (RR: 1.56 [95% CI: 1.41, 1.71] black/African American, RR: 0.23 [95% CI: 0.20, 0.27] Asian/Pacific Islander, RR: 2.53 [95% CI: 2.29, 2.79] American Indian/Alaska Native, RR: 0.80 [95% CI: 0.75, 0.86] Latinx, white as referent category), gender (RR: 2.70 [95% CI: 2.55, 2.87] male vs female) and month that allegation occurred (RR: 2.29 [95% CI: 2.11, 2.50] school year vs summer).
The negative binomial models included an offset for age, gender, and race/ethnicity-specific annual population estimates of youth reporting cannabis use. The model was adjusted for age (RR: 1.72 [95% CI: 1.63, 1.83] 15‒17 years vs 10‒14 years), race/ethnicity (RR: 1.04 [95% CI: 0.94, 1.14] black/African American, RR: 0.41 [95% CI: 0.36, 0.48] Asian/Pacific Islander, RR: 1.74 [95% CI: 1.58, 1.92] American Indian/Alaska Native, RR: 0.62 [95% CI: 0.58, 0.66] Latinx, white as referent category), gender (RR: 2.70 [95% CI: 2.55, 2.87] male vs female) and month that allegation occurred (RR: 2.33 [95% CI: 2.13, 2.53] school year vs summer).