Table 2.
Comparison of CPET parameters between EH group and non-EH group.
| EH group (n = 47) | Non-EH group (n = 53) | P value | |
|---|---|---|---|
| Resting | |||
| VO2 (L/min), median (IQR) | 0.37 (0.31, 0.40) | 0.36 (0.32, 0.41) | 0.97 |
| VO2/kg (ml/kg/min), median (IQR) | 4 (4, 5) | 4 (4, 5) | 0.09 |
| HR (bpm) | 89.66 ± 11.09 | 89.70 ± 12.78 | 0.99 |
| VO2/HR (ml/beat), median (IQR) | 3.98 (3.49, 4.55) | 4.03 (3.61, 4.33) | 0.94 |
| AT | |||
| VO2 (L/min), median (IQR) | 1.14 (0.91, 1.34) | 1.03 (0.91, 1.21) | 0.07 |
| VO2/kg (ml/kg/min), median (IQR) | 13 (12, 15) | 13 (11, 15) | 0.61 |
| HR (bpm), median (IQR) | 115 (108, 124) | 116 (108, 127) | 0.80 |
| VO2/HR (ml/beat) | 9.96 ± 1.71 | 9.10 ± 1.71 | 0.02∗ |
| WR (watt) | 78.55 ± 23.01 | 74.49 ± 16.29 | 0.31 |
| Peak | |||
| VO2 (L/min), median (IQR) | 1.67 (1.42, 2.03) | 1.64 (1.48, 1.94) | 0.41 |
| VO2/kg (ml/kg/min), median (IQR) | 20 (17, 22) | 21 (18, 23) | 0.29 |
| HR (bpm) | 148.45 ± 15.79 | 150.49 ± 18.67 | 0.31 |
| VO2/HR (ml/beat) | 11.71 ± 2.11 | 11.24 ± 2.11 | 0.25 |
| WR (watt) | 146.66 ± 27.76 | 143.92 ± 27.88 | 0.59 |
| Resting to AT | |||
| △HR/△WR (bpm/watt) | 0.35 ± 0.10 | 0.36 ± 0.12 | 0.59 |
| AT to peak | |||
| △HR/△WR (bpm/watt) | 0.45 ± 0.11 | 0.47 ± 0.12 | 0.73 |
| Resting to peak | |||
| △HR/△WR (bpm/watt) | 0.40 ± 0.09 | 0.42 ± 0.11 | 0.32 |
| VO2/HR plateau [n (%)] | 19 (40.43) | 11 (20.75) | 0.03∗ |
VO2: oxygen consumption per minute, VO2/kg: oxygen consumption per kilogram of body weight per minute, HR: heart rate per minute, VO2/HR: oxygen pulse, WR: work rate, and △HR/△WR: heart rate increment per unit work rate. ∗P < 0.05; ∗∗P < 0.01.