Number of past-year medical conditions was based on a list of 11 chronic and acute conditions. Respondents had to report that their diagnosis had been confirmed by a health professional. Past-year health insurance coverage distinguished private insurance (obtained by the individual or provided a current or prior employer, including the military) from public insurance (Medicare, Medicaid) (referent = no coverage). Past-year mood disorder and anxiety disorder conformed to DSM-IV criteria, as did lifetime personality disorder. The derivation, reliability and validity of these diagnoses have been described in detail elsewhere (Grant et al., 2004b, 2004c; Hasin et al., 2007; Pulay et al., 2010). Past-year smokers comprised individuals who used any of five types of tobacco, and past-year drug users comprised those who reported illicit use any of 10 types of drugs, distinguishing those who did and did not satisfy the DSM-IV criteria for a drug use disorder (DUD) (Stinson et al., 2005).
