Fig. 1.

Bland-Altman plot of walking distances in meters (m): (A) of the best 6MWT on tracks of 30 m (6MWT₃₀) and of 20 m (6MWT₂₀); (B) test-retest of 6MWT₂₀; (C) test-retest of 6MWT₃₀. The central continuous line represents the mean difference between two 6MWT, and the upper and lower dotted lines represent the upper limits (UL) and lower limits (LL) of agreement. The dashed lines represent the minimum important difference (MID) of 30 m for the 6MWT. (A) LL: -24.8; UL: 72.7; mean: 22.1; (B) LL: −26.7; UL: 40.9; mean: 7.10; (C) LL: −48.1; UL: 72.9; mean: 12.4.