TABLE 2.
Physiological variables in each stage of the Bruce test for COVID-19 survivors.
| Stage | HR (bpm) | VE (L/min) | VO2 peak (ml.kg−1.min−1) | VO2/HR | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| NH | Hospital | ICU | NH | Hospital | ICU | NH | Hospital | ICU | NH | Hospital | ICU | |
| S1 | 121.2 ± 20.42 | 119.8 ± 22.9 | 124.73 ± 21.6 | 23.9 ± 8.0 | 23.9 ± 8.3 | 25.9 ± 9.4 | 13.9 ± 3.7 | 14.6 ± 4.6 | 14.7 ± 4.3 | 10.6 ± 4.0 | 11.4 ± 4.2 | 10.6 ± 3.3 |
| S2 | 135.2 ± 18.9 | 135.9 ± 23.3 | 137.7 ± 22.6 | 34.0 ± 10.9 | 33.5 ± 11.8 | 34.5 ± 11.8 | 18.3 ± 4.5 | 18.6 ± 5.1 | 17.9 ± 4.6 | 12.5 ± 4.2 | 12.6 ± 4.2 | 11.9 ± 3.4 |
| S3 | 155.8 ± 16.9 | 151.7 ± 23.5 | 149.0 ± 22.3 | 48.8 ± 16.8 | 42.7 ± 15.9 | 45.5 ± 19.0 | 23.0 ± 6.3 | 21.6 ± 6.3 | 21.2 ± 6.4 | 13.6 ± 5.1 | 13.3 ± 4.4 | 13.0 ± 4.2 |
| S4 | 172.5 ± 15.6** | 155.7 ± 22.1 | 155.6 ± 21.5 | 66.3 ± 21.7** | 52.9 ± 21.9 | 49.2 ± 14.5 | 28.3 ± 7.6‡ | 25.4 ± 9.1 | 22.8 ± 5.4 | 14.7 ± 5.1 | 15.1 ± 4.7 | 13.5 ± 4.1 |
| S5 | 172.9 ± 20.7 | 165.3 ± 16.0 | 151.8 ± 20.1 | 61.5 ± 25.3 | 55.6 ± 17.7 | 57.6 ± 10.6 | 29.6 ± 9.9 | 26.9 ± 9.8 | 25.3 ± 3.8 | 14.0 ± 6.6 | 17.2 ± 4.4 | 17.8 ± 3.2 |
| S6a | 185.0 ± 4.24 | 174.5 ± 0.7 | 163.0 | 98.0 ± 5.3 | 68.9 ± 13.4 | 72.5 | 33.7 ± 7.0 | 29.2 ± 0.3 | 25.5 | 14.8 ± 0.4 | 17.7 ± 5.6 | 19.2 |
Note: Numerical data is described as mean and standard deviation (SD). Categorical data is described as absolute and relative (%) frequencies. NH, non-hospitalized; ICU, intensive care unit; S1 = Stage 1; S2 = Stage 2; S3 = Stage 3; S4 = Stage 4; S5 = Stage 5; S6 = Stage 6; HR, heart rate; VE, ventilation; VO2peak = peak oxygen consumption; VO2/HR, relationship between peak oxygen consumption and heart rate. * = Statistically significant difference between NH, and ICU, groups (p < 0.05); ** = Statistically significant difference between NA, and Hospital/ICU, groups (p < 0.05); ‡ = Statistically significant difference between NH, and Hospital groups (p < 0.05); † = Statistically significant difference between Hospital and ICU, groups (p < 0.05); a=ICU, group values have no SD, reported since only one individual from this group performed S6.