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Table 2 Validity analysis of Siconolfi step test (SST) against cardiopulmonary exercise test (CPET)

From: The Siconolfi step test: a valid and reliable assessment of cardiopulmonary fitness in older men with prostate cancer

Validity analysis

Validity cohort

(N = 66)

>  60 years olds

(n = 56)

SST

 Predicted VO2peak (ml/kg/min):

  average (SD)

19.5 (5.1)

19.2 (5.2)

  range

10.8–35.5

10.8–35.5

 Heart rate (bpm): mean (SD)

141.6 (20.7)

142.2 (21.2)

CPET

 Measured VO2peak (ml/kg/min):

  average (SD)

21.1 (6.5)

19.8 (5.1)

  range

9.9–40.2

9.9–32.5

 Heart rate (bpm): mean (SD)

148.7 (15.9)

147.5 (16.2)

Pearson correlation

 r

0.69

0.73

 P value

< 0.001

< 0.001

 0.95% CI

0.54–0.80

0.58–0.83

Paired t-test

 average difference

1.61

0.64

 P value

0.010

0.217

 0.95% CI

0.43–3.09

-0.38–1.66

ICC

 ICC

0.64

0.73

 P value

< 0.001

< 0.001

 0.95% CI

0.48–0.77

0.58–0.83

  1. Results are presented for all patients that participated in Visit 1 and provided valid SST and CPET data (validity cohort, N = 66) (column 1), and the subsample of patients older than 60 years (n = 56) (column 2). Validity is assessed with Pearson correlation (r), paired t-test and intraclass correlation coefficient (ICC). Statistical significance was considered at level of P < 0.05