Table 5 shows the incidence of pain and the use of nitrates in the CABG, PTCA, and medication groups at 8 years after the interventions. The patients were questioned about their use of medication, including sleeping pills and pain killers, and were asked if they received psychotherapy. All groups included patients with chest pain on exercise and at rest. The patients with CABG had the least pain and used nitrates less than the others. The patients were asked separately about chest pain because the Nlll’ does not differentiate between chest pain and other pain. Many of the participants were elderly and therefore might have had musculoskeletal pains, which are not distinctive indicators of the HRQoL of CAD patients (characterized specifically by chest pain). Comorbidities like diabetes, arthritis. depression, and hypertension were analyzed and they were similar in the three groups of patients.