First author [Ref.] | Patients with 2 6MWDs at baseline n | Intraclass correlation coefficient | sd (baseline 6MWD) | sem (95% CI) |
All studies | 305 | 0.90 | 111 | 35 (30–42) |
Puhan 11 | 90 | 0.89 | 111 | 37 (29–53) |
Goldstein 21 | 89 | 0.88 | 99 | 35 (29–45) |
Mador 22 | 13 | 0.93 | 108 | 29 (21–41) |
Mador 19 | 26 | 0.94 | 120 | 30 (22–40) |
Mador 18 | 29 | 0.83 | 98 | 41 (21–59) |
Krauza 23 | 41 | 0.96 | 104 | 20 (16–26) |
Mador, unpublished results | 17 | 0.88 | 79 | 27 (17–35) |
6MWD: 6-min walk distance; CI: confidence interval.