CoV standards for various physiological variables measured during a biological quality control programme
| Biological QC standards for CPET | |||||||||
| Variable | HR | BF | VE | VO2 | VCO2 | RER | VTex | ΔVO2/ΔWR | ΔVE/ΔVCO2 |
| CoV | 5% | 8% | 8% | 6% | 6% | 8% | 8% | 10% | 10% |
BF, breathing frequency; CoV, coefficient of variation; CPET, cardiopulmonary exercise testing; RER, respiratory exchange ratio; VTex, expiratory tidal volume.