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. 2020 Jun 22;180(8):1061–1068. doi: 10.1001/jamainternmed.2020.1757

Table 1. States With Nonzero Weights in Contributing to Synthetic Colorado and Synthetic Washingtona.

State Contributing weight
Synthetic Colorado Synthetic Washington
California 0.052 0.373
Connecticut 0 0.021
Delaware 0.001 0.016
Louisiana 0.001 0
Maryland 0.141 0
Missouri 0.001 0
Nebraska 0.004 0
New Hampshire 0.270 0
New Jersey 0.156 0.466
New York 0.040 0
North Carolina 0.001 0
Rhode Island 0.097 0.140
Tennessee 0.002 0
Texas 0.190 0
West Virginia 0.039 0
a

Traffic fatalities in Colorado and Washington State before implementation of recreational cannabis laws (RCLs) are best reproduced by a combination of the states listed above (eg, for Washington State, a combination of California, Connecticut, Delaware, New Jersey, and Rhode Island, with New Jersey having the strongest influence on combined estimates). Forty-two states were used in the pool of controls. States implementing RCLs during the study period (Alaska, Massachusetts, Maine, Nevada, Oregon, Colorado, and Washington) and states outside the contiguous 48-state region (Alaska and Hawaii) were not included.