The MIDUS Survey diagnoses were based on the Composite International Diagnostic Interview Short Form (CIDI-SF) scales, a series of diagnostic-specific scales that were developed from item-level analyses of the Composite International Diagnostic Interview questions in the National Comorbidity Survey.15–16 The CIDI-SF scales were designed to reproduce the full composite international diagnoses as well as possible with only a small subset of the original questions. CIDI-SF diagnoses at 12 months assessed in the MIDUS Survey included major depression, panic attacks, generalized anxiety disorder (GAD), alcohol abuse and dependence, and drug abuse and dependence (past 12-month prevalence). Panic attacks were diagnosed with the CIDI-SF.15 The sensitivity of CIDI-SF classification for panic attack is 90.0 and specificity is 99.5; for major depression, sensitivity is 89.6 and specificity is 93.9; for GAD, sensitivity is 96.6 and specificity is 99.8; for alcohol dependence, sensitivity is 93.6 and specificity is 96.2; and for substance dependence, sensitivity is 77.0 and specificity 99.9.17 Data on physical illness diagnoses were obtained through self-report. Subjects were asked whether they had ever experienced or been treated for the following physical conditions in the past 12 months: asthma, bronchitis, emphysema, other lung problems, as well as high BP/hypertension, autoimmune diseases, diabetes, ulcer, sciatica, thyroid disease, hay fever, tuberculosis, gall bladder disease, AIDS/HIV, neurologic disorders, stroke, hernia, and recurrent stomach problems. For analyses in the current study, there were three binary variables used to examine respiratory disease. One variable, termed respiratory disease, included those who endorsed having either asthma, chronic bronchitis, or emphysema. The second variable, termed lung disease, included those who endorsed having “other lung disease.” The third variable, termed comorbid respiratory disease, included individuals who endorsed having both asthma, chronic bronchitis, or emphysema and other lung disease. Subjects were grouped by marital status (married, divorced/widowed, never married) and educational attainment was dichotomized into those who had and had not completed high school.