Figure 2. Pearson's and Spearman's correlation coefficients. A, correlation between ISWT distance and oxygen consumption in CPX in mL·kg-1·min-1; B, correlation between oxygen consumption in ISWT and CPX in mL· kg-1·min-1; C, correlation between carbon dioxide production in ISWT and CPX in mL/min; D, correlation between oxygen consumption in ISWT and CPX in mL/min. ISWT: incremental shuttle walk test; CPX: cardiopulmonary exercise testing; VO2: oxygen consumption; VCO2: carbon dioxide production.
