Table 3. Reliability and repeatability of robot-assisted stair-climbing-based cardiopulmonary exercise testing (n = 20).
| Trial 1 | Trial 2 | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Mean±SD | Mean±SD | p-value | MD | (LoA) | CoV | ICC | (95%CI) | SEM | SEM% | MDC | MDC% | |
| Primary outcomes | ||||||||||||
| V′O2peak absolute [L/min] | 3.23±0.83 | 3.29±0.83 | *0.028 | 0.05 | (0.15–0.25) | 0.03 | 0.991 | 0.973–0.998 | 0.01 | 0.29 | 0.03 | 0.81 |
| V′O2peak relative [mL/min/kg] | 44.99±7.57 | 45.73±7.04 | *0.029 | 0.74 | (2.06–3.54) | 0.03 | 0.978 | 0.933–0.992 | 0.21 | 0.46 | 0.58 | 1.27 |
| HRpeak [beats/min] | 186.95±7.39 | 185.90±7.38 | 0.183 | 1.05 | (5.74–7.84) | 0.02 | 0.890 | 0.746–0.955 | 1.13 | 0.60 | 3.12 | 1.67 |
| Ppeak [W] | 155.54±45.19 | 162.16±45.03 | *<0.001 | 6.61 | (5.54–18.76) | 0.04 | 0.981 | 0.791–0.995 | 0.84 | 0.53 | 2.32 | 1.46 |
| VAT [L/min] | 1.84±0.46 | 1.92±0.74 | 0.146 | 0.08 | (0.39–0.54) | 0.12 | 0.869 | 0.701–0.946 | 0.08 | 4.48 | 0.23 | 12.42 |
| RCP a [L/min] | 2.84±0.72 | 2.89±0.82 | 0.269 | 0.05 | (0.63–0.73) | 0.12 | 0.902 | 0.757–0.963 | 0.11 | 3.72 | 0.29 | 10.30 |
| Secondary outcomes | ||||||||||||
| tV′O2peak [min] | 8.01±0.95 | 8.36±1.13 | *0.004 | 0.35 | (0.58–1.27) | 0.06 | 0.858 | 0.519–0.951 | 0.17 | 2.14 | 0.48 | 5.92 |
| V′Epeak [L/min] | 125.91±35.32 | 127.90±34.18 | 0.421 | 1.99 | (19.62–23.60) | 0.09 | 0.952 | 0.886–0.981 | 2.37 | 1.87 | 6.56 | 5.17 |
| Rfpeak [1/min] | 51.32±9.59 | 52.01±8.85 | 0.555 | 0.69 | (9.60–10.98) | 0.10 | 0.849 | 0.659–0.937 | 2.00 | 3.87 | 5.54 | 10.72 |
| RERpeak | 1.22±0.07 | 1.21±0.06 | 0.579 | 0.01 | (0.08–0.09) | 0.04 | 0.801 | 0.564–0.916 | 0.02 | 1.59 | 0.05 | 4.40 |
| ΔV′O2/ΔPmech [mL/min/W] | 19.12±2.39 | 18.62±1.95 | 0.055 | 0.50 | (1.68–2.68) | 0.06 | 0.858 | 0.660–0.943 | 0.41 | 2.17 | 1.14 | 6.03 |
| ΔV′E/ΔV′CO2 | 31.02±3.67 | 31.04±3.69 | 0.975 | 0.01 | (3.55–3.58) | 0.06 | 0.888 | 0.738–0.954 | 0.60 | 1.92 | 1.65 | 5.33 |
| RMSEP [W] | 3.36±1.27 | 2.56±0.59 | *0.004 | 0.80 | (1.34–2.93) | 0.36 | 0.323 | -0.068–0.649 | 0.88 | 29.70 | 2.44 | 82.32 |
| ΔV′O2 rest-passive [mL/min] | 661.36±224.68 | 655.67±246.03 | 0.834 | 5.70 | (234.55–245.94) | 0.18 | 0.875 | 0.712–0.949 | 42.47 | 6.45 | 117.72 | 17.88 |
| ΔHR rest-passive [beats/min] | 17.62±6.71 | 16.46±8.24 | 0.273 | 1.16 | (8.05–10.37) | 0.27 | 0.810 | 0.588–0.920 | 2.01 | 11.78 | 5.56 | 32.65 |
SD, Standard deviation; MD, Mean difference; LoA, Limits of agreement; CoV, Coefficients of variation; ICC, Intraclass correlation coefficient; CI, Confidence interval; SEM, Standard error of the measurement; MDC, Minimal detectable change; V′O2, Oxygen uptake; HR, Heart rate; P, Work rate (power); VAT, Ventilatory anaerobic threshold; RCP, Respiratory compensation point; t, time; V′E, Ventilation rate; Rf, Respiratory rate; RER, Respiratory exchange ratio; V′CO2, Carbon dioxide output; RMSE, Root mean square error
a n = 17
* p < 0.05