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. 2019 Sep 13;10:678. doi: 10.3389/fpsyt.2019.00678

Table 1.

Number of deaths related to current substance use with regard to history of substance use disorder (Chi2 statistic 14.04, p > 0.001).

Chi2 Deaths related to current substance use Deaths unrelated to current substance use
History of SUD 47 171
No history of SUD 9 127