Prognostic assessment in COPD: health related quality of life and the BODE index.

Rationale: COPD is a debilitating disease with increasing mortality worldwide. The BODE index evaluates disease severity and the St George's Respiratory Questionnaire (SGRQ) measures health status.

Objective: To identify the relationship between BODE index and the SGRQ and to test the predictive value of both tools against survival.