The following sources were used to create a data set for analysis: the Total Population Register, containing year of birth, sex, and annual data on place of residence; the Swedish National Census; the Swedish Mortality Register, containing dates of death; the Multigeneration register, linking children born after 1932 to their parents; the Swedish Hospital Discharge Register, containing data on hospitalizations from 1964 to 2010; the Outpatient Care register, containing information from all outpatient clinics between 2001 and 2010; the Prescribed Drug register, containing data on all prescriptions in Sweden picked up by patients from 2005 to 2010; the Primary Health Care Register, containing data on outpatient diagnoses from 2001 to 2007 for 1 million patients from Stockholm and parts of southern Sweden; the Swedish Crime Register, which contains complete national data an all convictions in lower courts from 1973 to 2011; the Swedish Suspicion Register, which includes complete national data on individuals strongly suspected of crime from 1998 to 2011; and the Swedish Twin Register (32).
