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Table 1 Pearson correlation coefficients, and 95% confidence intervals, between the measured values for the four CPET scores and the IPAQ global score, and the eight wearable variables

From: Can wearable technology be used to approximate cardiopulmonary exercise testing metrics?

Wearable variable

CPET variables

IPAQ global score

Peak VO2

VE/VCO2

AT

Peak work

Floors climbed

0.57 (0.29, 0.76)

− 0.30 (− 0.58, 0.04)

0.37 (0.01, 0.64)

0.56 (0.27, 0.75)

0.71 (0.45, 0.86)

Intense minutes

0.08 (− 0.26, 0.41)

0.06 (− 0.29, 0.39)

− 0.01 (− 0.37, 0.35)

0.06 (− 0.28, 0.39)

0.32 (− 0.07, 0.63)

Average heart rate

− 0.27 (− 0.55, 0.08)

− 0.01 (− 0.35, 0.33)

− 0.47 (− 0.71, − 0.13)

− 0.18 (− 0.49, 0.17)

− 0.16 (− 0.51, 0.24)

Resting heart rate

− 0.26 (− 0.55, 0.08)

0.07 (− 0.28, 0.40)

− 0.36 (− 0.64, 0.00)

− 0.15 (− 0.46, 0.20)

− 0.09 (− 0.46, 0.30)

Maximum heart rate

0.00 (− 0.34, 0.34)

− 0.09 (− 0.42, 0.25)

− 0.18 (− 0.50, 0.20)

0.16 (− 0.19, 0.47)

0.31 (− 0.08, 0.62)

Total steps

0.59 (0.31, 0.77)

− 0.19 (− 0.50, 0.16)

0.39 (0.04, 0.66)

0.48 (0.17, 0.70)

0.54 (0.20, 0.76)

Total calories

0.02 (− 0.32, 0.36)

− 0.07 (− 0.40, 0.27)

− 0.15 (− 0.48, 0.22)

0.07 (− 0.27, 0.40)

0.20 (− 0.20, 0.54)

Total distance

0.62 (0.35, 0.79)

− 0.21 (− 0.51, 0.14)

0.42 (0.07, 0.68)

0.50 (0.20, 0.72)

0.51 (0.17, 0.75)

  1. AT Anaerobic threshold, CPET Cardio-pulmonary exercise testing, VO2 Maximal oxygen uptake, IPAQ International Patient Activity Questionnaire