These analyses are based on the Swedish population. The following national registries were used: 1) the Swedish Hospital Discharge Register, which included hospitalizations for people in Sweden from 1964 through 2010, classified by the main discharge diagnosis and eight secondary diagnoses; 2) the Multi-Generation Register linking children born after 1932 to their parents; 3) the National Census Registry, which provided information on education at 5-year increments (1960–1990); 4) the Total Population Registry, which included annual data on education from 1990 to 2009; and 5) the Swedish Crime Register, containing all convictions in lower court from 1973 to 2011.
