Cannabis Exposures Among Children in Massachusetts, US, from 2016 to 2021
| Before RCL and implementation, FFY 2016–2018 | After RCL and implementation, FFY 2019–2021 | P value | |
| Cannabis ED exposure visits per 100 000 individuals | |||
| IRR (95% CI) | |||
| Unadjusted | 1 (Reference) | 1.7 (1.2–2.3) | 0.002 |
| Adjusted for yearly time trend | 1 (Reference) | 2.0 (1.04–3.75) | 0.035 |
| Cannabis-related hospitalisation per 1 000 000 individuals | |||
| IRR (95% CI) | |||
| Unadjusted | 1 (Reference) | 2.3 (1.8–2.8) | <0.001 |
| Adjusted for yearly time trend | 1 (Reference) | 2.5 (1.7–3.6) | <0.001 |