Fig. 2

Bland-Altman analysis. a) Validity of Siconolfi step test (SST) against cardiopulmonary exercise test (CPET) using data for n = 56 participants > 60 years old (≤ 60 years olds were removed according to the results of regression analysis). b) Reliability of Siconolfi step test (SST) using data for N = 56 participants that provided valid SST data at both visits