All participants reported their highest level of education by responding to the question “What is the highest grade in school you completed?” Responses were converted to the number of years typically required to complete that level of education and ranged from 0 to 17 years (primary or secondary school = actual year; technical school/ 1 year college = 13 years; 2 years college = 14 years; 3 years college = 15 years; 4 years college = 16 years; any graduate degree = 17 years). For individuals who completed multiple SSAGA interviews, the maximum reported educational attainment was used.