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Table 2 The VCO2 performance

From: Validation of carbon dioxide production (VCO2) as a tool to calculate resting energy expenditure (REE) in mechanically ventilated critically ill patients: a retrospective observational study

  Mean difference Standard deviation % Error % Difference Correlation Concordance Agreementa Tight agreementb
VCO2 with 0.89 RQc − 122.78 604.92 0.24 0.16 0.51 (0.44–0.57) 0.37 (0.27–0.47) 0.37 0.11
VCO2 with 0.85 RQ −41.77 625.57 0.24 0.16 0.51 (0.44–0.57) 0.37 (0.27–0.47) 0.4 0.13
VCO2 with 0.80 RQ 62.54 652.95 0.25 0.16 0.51 (0.44–0.57) 0.37 (0.26–0.47) 0.42 0.16
VCO2 with 0.75 RQ 178.17 684.37 0.26 0.16 0.51(0.44–0.57) 0.35(0.25–0.45) 0.43 0.18
  1. aWithin 85% and 115% of measured REE
  2. bWithin 95% and 105% of measured REE
  3. cEquivalent to REE calculation of 5.5*VCO2*1.44
  4. Abbreviations: REE resting energy expenditure, RQ respiratory quotient, VCO2 carbon dioxide production