“…As previously observed in this cohort and opioid users in the UK (Beynon et al, 2010;Degenhardt et al, 2014), older age was associated with increased mortality from each of the chronic diseases we examined, namely cancer, cardiovascular disease, and liver disease. Unlike a prior analysis (Degenhardt et al, 2014), we did not find that younger age was associated with drug overdose or death from unintentional injury or suicide, possibly because of our competing risks approach.…”