ACE and chronic obstructive pulmonary disease: Significant prognostic factors for 6 months survival were high education level (HR = 0.74, CI 95% 0.59—0.93), COPD (HR = 1.91, CI 95% 1.2—3.04), CVA (HR = 1.69, CI 95% 1.03—2.78), Angiotensin Converting enzyme (ACE) inhibitors use (HR = 0.44, CI 95% 0.3—0.66) and Diuretics (HR = 0.63, CI 95% 0.41-0.96).