Fig. 2
From: Fatigability in spinal muscular atrophy: validity and reliability of endurance shuttle tests
a-d. illustration of test and re-test effect on the endurance shuttle tests. Parametric Weibull curves of the Endurance Shuttle Tests. Probability of drop-out since test initiation on the Endurance Shuttle Nine Hole Peg Test (a), Endurance Shuttle Box and Block test (b), Endurance Shuttle Walk Test (c) and Endurance Shuttle Test Combined Score (d) at test 1 (orange) and test 2 (red) (b) in patients with SMA. The horizontal dashed line depicts the median time to drop-out.