For mortality rate ratios, the general population is divided into 4 discrete groups: mental disorders only (MD+), general medical condition only (GMC+), both (MD+ GMC+), and those without either the mental disorder or the GMC (MD– GMC–). For life-years lost, the general population is divided into 3 overlapping groups. First, the MD+ group comprises everyone with an MD (ie, including those in the MD+ GMC+ group). The GMC+ group comprises everyone with a GMC (ie, including those in the MD+ GMC+ group). Third, the general population comprises everyone (ie, including those in each of the 3 groups MD+, GMC+, and MD+ GMC+ as well as everyone else).