TABLE 5.
The accuracy of the estimated VO2max by the step test index and the post-SDNN (N = 40).
|
Stepindex |
Post−SDNN |
|||||||
| Regressionequation | R-square | 95%CI | Accuracy | Regressionequation | R-square | 95%CI | Accuracy | |
| Overall | y = 0.227x + 12.830 | 0.29 | (0.12, 0.37) | 93.19% | y = 0.112x + 20.350 | 0.22 | (0.02, 0.18) | 92.85% |
| GroupI | y = 0.184x + 15.474 | 0.27 | (0.06, 0.34) | 94.04% | y = 0.138x + 18.952 | 0.36 | (0.05, 0.24) | 93.99% |
| GroupII | y = 0.445x + 0.371 | 0.44 | (0.15, 0.77) | 92.65% | y = 0.050x + 23.262 | 0.03 | (−0.22, 0.21) | – |
The accuracy of the estimated value was calculated by 1 − [(cardiopulmonary exercise test measured value − estimated value) / cardiopulmonary exercise test measured value)] × 100%.