Table 3. Proportion of Pediatric Regional Center for Poison Control and Prevention Cases Involving Cannabis Before vs After MML in Massachusetts.
| Age Group, y | No. of Cannabis Cases (% of All Massachusetts RPC Cases) | |||||
|---|---|---|---|---|---|---|
| Cannabis Single-Substance Cases | Cannabis-Involved Polysubstance Cases | |||||
| Before MML, 2009-2012 | After MML, 2013-2016 | P Value for Differencea | Before MML, 2009-2012 | After MML, 2013-2016 | P Value for Differencea | |
| All, 0-19 | 29 (0.04) | 69 (0.10) | <.001 | 54 (0.07) | 66 (0.10) | .07 |
| 0-4 | 6 (0.01) | 13 (0.03) | .05 | 0 | 3 (0.01) | .10 |
| 5-9 | 0 | 2 (0.02) | .22 | 0 | 2 (0.02) | .22 |
| 10-14 | 1 (0.01) | 7 (0.11) | .03 | 4 (0.06) | 2 (0.03) | .47 |
| 15-19 | 22 (0.25) | 47 (0.57) | <.01 | 50 (0.58) | 59 (0.72) | .27 |
Abbreviations: MML, medical marijuana legalization; RPC, Regional Center for Poison Control and Prevention.
a
P values from χ2 tests or Fisher exact test when cell sizes were less than 5.