Table 2. Pediatric Cannabis Exposure Calls to the Massachusetts Regional Center for Poison Control and Prevention Before vs After MML.
| Age Group, y | No. of Calls (Incidence per 100 000 Population) | |||||
|---|---|---|---|---|---|---|
| Cannabis Single-Substance Cases | Cannabis-Involved Polysubstance Cases | |||||
| Before MML, 2009-2012 | After MML, 2013-2016 | After vs Before MML, IRR (95% CI) | Before MML, 2009-2012 | After MML, 2013-2016 | After vs Before MML, IRR (95% CI) | |
| All, 0-19 | 29 (0.4) | 69 (1.1) | 2.4 (1.5-3.9) | 54 (0.8) | 66 (1.0) | 1.2 (0.9-1.8) |
| 0-4 | 6 (0.4) | 13 (0.9) | 2.2 (0.8-7.0) | 0 (0.0) | 3 (0.2) | NCa |
| 5-9 | 0 (0.0) | 2 (0.1) | NCa | 0 (0.0) | 2 (0.1) | NCa |
| 10-14 | 1 (0.1) | 7 (0.4) | 7.1 (0.9-321.3) | 4 (0.2) | 2 (0.1) | 0.5 (0.1-3.6) |
| 15-19 | 22 (1.2) | 47 (2.6) | 2.2 (1.3-3.8) | 50 (2.7) | 59 (3.2) | 1.2 (0.8-1.8) |
Abbreviations: IRR, incidence rate ratio; MML, medical marijuana legalization; NC, not calculated.
a
The IRR cannot be calculated when incidence is 0 cases.