Vol. 7, Issue 2, Part H (2025)

The study aimed to evaluate the correlation of dyspnea using the Modified Medical Research Council (MMRC) scale and the Baseline Dyspnea Index (BDI) through the Six-Minute Walk Test (6MWT) among COPD patients. Twenty male subjects aged 35–55 years with moderate to severe COPD were included. Participants underwent pre- and post-assessments following two weeks of Buteyko breathing exercises. Statistical analysis showed significant improvement in dyspnea levels on both MMRC and BDI scales. However, a weak correlation was observed between MMRC and BDI, indicating they measure different aspects of dyspnea. The study concludes that both scales are effective but not interchangeable for evaluating dyspnea in COPD patients.