Table 2.
Cardiopulmonary exercise test characteristics before PSM.
| Characteristic | Pre-pandemic | During-pandemic | Post-pandemic | P |
|---|---|---|---|---|
| n = 2,252 | n = 3,878 | n = 1,520 | ||
| Peak VO2, L/min | 1.14 (0.31) | 1.12 (0.34)* | 1.17 (0.35)† | < 0.001 |
| Peak VO2/kg, ml/min/kg | 10.88 (2.01) | 10.74 (2.26)* | 11.25 (2.41)† | < 0.001 |
| Peak METs | 4.44 (1.08) | 4.31 (1.16)* | 4.48 (1.15)† | < 0.001 |
| AT METs | 3.43 (0.46) | 3.38 (0.53)* | 3.38 (0.60)* | 0.001 |
| AT VO2/kg, ml/min/kg | 10.88 (2.01) | 10.74 (2.26)* | 11.25 (2.41)*,† | < 0.001 |
| AT O2 pulse, ml/min/beat | 8.14 (1.71) | 7.84 (1.90)* | 8.01 (2.04)† | < 0.001 |
| Peak O2 pulse, ml/min/beat | 9.75 (2.32) | 9.29 (2.44)* | 9.38 (2.56)* | < 0.001 |
| Borg score | 16.07 (1.42) | 16.28 (2.77)* | 14.95 (5.31)*,† | < 0.001 |
| Weber Grade, No. (%) | < 0.001 | |||
| A | 291 (12.92%) | 434 (11.19%)‡ | 223 (14.67%)§ | |
| B | 870 (38.63%) | 1,450 (37.39%)‡ | 607 (39.93%) | |
| C | 1,004 (44.58%) | 1,667 (42.99%) | 600 (39.47%) | |
| D | 87 (3.86%) | 327 (8.43%)‡ | 90 (5.92%)‡,§ |
Bold value indicates a statistically significant difference.
A p-values of the relationship trends of the three groups of variables are also given in the table.
Symbols denote significant differences from the pre-pandemic group (*P <.05; and ‡P <.0167), during-pandemic group (†P <.05 and §P <.0167).
Data are mean ± SD, median (interquartile range), or number (%).
Abbreviations: Peak VO2, peak oxygen uptake; Peak VO2/kg, peak oxygen uptake per kilogram; Peak METs, peak Metabolic Equivalent; AT VO2/kg, oxygen uptake per kilogram at anaerobic threshold; AT O2 pulse, Oxygen pulse at anaerobic threshold; Peak O2 pulse, Peak Oxygen pulse.