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Table 1 Validity of peak oxygen uptake measurement between the criterion measure and the VitaScale and reliability of the criterion measure while cycling at different intensities

From: Proof-of-concept and concurrent validity of a prototype headset to assess peak oxygen uptake without a face mask

Statistical parameter

Peak oxygen uptake (90% confidence limits)

 

Validity between vitascale and criterion measure

Reliability of the criterion measure

Standardized mean

bias

− 0.01 (− 2.77–2.74)

Cannot be calculated

Pearson’s r

0.95 (0.91–0.97)

0.96 (0.89–0.99)

Coefficient

of

variance (%)

6.8 (5.6–8.7)

4.0 (3.0–6.3)

Standardized typical error of estimate

0.33 (0.24–0.45)

Cannot be calculated

Standardized typical

error

Cannot be calculated

0.21 (0.16–0.33)