Results of the MRC scale and associated likelihood ratios for each score
| MRC DYSPNEA SCALE SCORE | TOTAL (N = 829), N (%) | PATIENTS WITH COPD†(N = 168), N (%) | PATIENTS WITHOUT COPD†(N = 661), N (%) | LIKELIHOOD RATIO (95% CI) |
|---|---|---|---|---|
| 1 | 389 (46.9) | 44 (26.2) | 345 (52.2) | 0.50 (0.39–0.65) |
| 2 | 320 (38.6) | 88 (52.4) | 232 (35.1) | 1.49 (1.25–1.78) |
| 3 | 91 (11.0) | 21 (12.5) | 70 (10.6) | 1.18 (0.75–1.86) |
| 4 | 22 (2.7) | 11 (6.5) | 11 (1.7) | 3.93 (1.74–8.92) |
| 5 | 7 (0.8) | 4 (2.4) | 3 (0.5) | 5.25 (1.19–23.22) |
CI—confidence interval, COPD—chronic obstructive pulmonary disease, MRC—Medical Research Council.
* Of the 1003 participants, 174 reported a limited capacity to walk primarily as a consequence of a musculoskeletal comorbid condition and their scores on the MRC scale were excluded from further analysis.
↵† According to results of spirometry testing.