Table 1.
Descriptive statistics; heart transplant recipients and healthy controls
| Variables* | HTx (n=14) | Healthy controls (n=5) | P value |
| Sex (% men) | 86 | 80 | 1.000 |
| Age (years) | 53 (13) | 52 (7) | 0.764 |
| In work (% yes) | 71 | 100 | 0.530 |
| Time after HTx (years) | 3 (2) | – | |
| Smoking (% never smoked) | 79 | 100 | 0.530 |
| Exercise variables | |||
| Vo2peak (mL/kg/min) | 31.0 (6.8) | 40.2 (2.7) | 0.001 |
| % of estimated Vo2 | 85 (17) | 111 (15) | 0.014 |
| Peak heart rate | 153 (17) | 182 (14) | 0.004 |
| RER | 1.16 (0.10, 1.22) | 1.23 (1.20, 1.24) | 0.087 |
| VE/VCo2slope | 24 (12) | 25 (3) | 0.791 |
| Peak respiration rate | 46 (9) | 49 (8) | 0.567 |
| O2pulse | 15.7 (3.1) | 17.9 (2.3) | 0.131 |
| Peak systolic BP | 211 (25) | 215 (20) | 0.744 |
| Peak diastolic BP | 92 (30) | 90 (9) | 0.824 |
| Self-reported physical activity | |||
| Exercise frequency (%) ≤once weekly/2–3 weekly/approximately daily |
7/57/36 | 20/80/0 | 0.263 |
| Exercise duration (%) <30 min/>30 min |
14/86 | 25/75 | 1.000 |
| Exercise intensity (%) Low intensity/moderate intensity/maximum intensity |
21/72/7 | 0/75/25 | 0.416 |
| Meeting the recommendations for daily activity† (% yes) | 86 | 60 | 0.272 |
| Inactivity daily (hours) | 6 (3) | 8 (5) | 0.331 |
*Variables are presented as mean (SD) or median (1st quartile, 3rd quartile).
†≥30 min.
BP, blood pressure; HTx, heart transplant recipients; RER, respiratory equivalent rate; VE, ventilation.