Association between achieving MID in both 6MWD and SGRQ (or in neither/nor) across overall study groups (SLH and PExT)
| OR:1.78 p=0.065 | SGRQ-MID total score achieved | |||
| Yes | No | |||
| SLH | 6MWD-MID achieved | Yes | 19 (17.6%) | 12 (11.1%) |
| No | 34 (31.5%) | 43 (39.8%) | ||
| PExT | Yes | 15 (17.2%) | 16 (18.4%) | |
| No | 21 (24.1%) | 35 (40.2%) | ||
Table 4 depicts results from the Cochran-Mantel-Haenszel test for 2×2 xK tables to assess association and independence between achieving 6MWD-MID and/or SGRQ-MID across both study groups (SLH and PExT).
MID, minimal important difference; 6MWD, 6-minute walking test distance ; PExT, physical exercise training; SGRQ, St. George’s Respiratory Questionnaire ; SLH, singing for lung health.