Table 2.
Comparison of masked and unmasked CPET results.*
| Unmasked | Masked | ||
|---|---|---|---|
| Mean ± SD | Mean ± SD | p Value | |
| Test duration (min) | 10.32 ± 1.36 | 10.03 ± 1.42 | 0.030* |
| MET | 8.92 ± 1.53 | 7.72 ± 1.84 | 0.001* |
| Peak | |||
| VO2 (ml/kg/min) | 31.23 ± 5.37 | 27.03 ± 6.46 | 0.001* |
| VO2 (ml/dk) | 2145.27 ± 647.70 | 1842.76 ± 622.06 | 0.001* |
| VE (l/min) | 79.16 ± 21.27 | 63.74 ± 19.91 | <0.001† |
| Respiratory frequency | 44.31 ± 7.66 | 42.38 ± 8.19 | 0.072 |
| HR (bpm) | 180.3 ± 13.46 | 173.65 ± 17.59 | 0.078 |
| EE (kcal/h) | 643.62 ± 194.38 | 552.76 ± 186.50 | 0.001* |
| Anaerobic threshold | |||
| AT time (min) | 3.72 ± 0.90 | 3.63 ± 0.79 | 0.648 |
| VO2 (ml/kg/min) | 16.43 ± 2.91 | 14.91 ± 4.34 | 0.103 |
| VO2 (ml/dk) | 1114.46 ± 299.88 | 1009.57 ± 355.42 | 0.117 |
| VE (l/min) | 16.43 ± 2.91 | 25.24 ± 9.73 | 0.056 |
| Respiratory frequency | 24.81 ± 7.38 | 24.07 ± 8.49 | 0.489 |
| Heart rate (bpm) | 133.08 ± 33.48 | 131.34 ± 19.44 | 0.768 |
| EE (kcal/h) | 334.31 ± 89.98 | 302.88 ± 106.70 | 0.117 |
| AT % VO2 | 53.08 ± 10.18 | 55.11 ± 12.98 | 0.436 |
| AT % HR | 75.77 ± 15.14 | 75.15 ± 7.82 | 0.837 |
Note: Values are mean ± SD.
Abbreviations: AT, anaerobic threshold; CPET, cardiopulmonary exercise test; EE, energy expenditure; HR, heart rate; MET, metabolic equivalent; SD, standard deviation; VE, minute ventilation; VO2, oxygen consumption.
*
Paired Student t test
†
Wilcoxon Signed‐rank test, p < 0.05.