without co-occurring SUD was 55% higher among veterans with dual diagnosis than among those without SUDs (Rosen et al., 2008). This study controlled for preexisting medical conditions in contrast to the two studies mentioned above (Dickey et al., 2004; Maynard et al., 2004). Only our study analyzed the mortality risk separately for alcohol and cannabis in PD where the endocannabinoid system may play a different role in risk of disease and pathobiology.
