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Table 2 Comparison of energy expenditure based on CO2 measurements (EEVCO2) to energy expenditure (EE) measured by indirect calorimetry in mean bias and accuracy rates

From: Can calculation of energy expenditure based on CO2 measurements replace indirect calorimetry?

 

Mean, SD

Mean bias

95% CI

SD of bias

p value

Accuracy rates (%)

(kcal/d)

(kcal/d)

Lower, upper

5%

10%

EEVCO2_0.85

1936, 441

-21

-41, 1

171

0.042

46.0

77.7

EEVCO2_FQ

1908, 439

-48

-67, -28

163

0.000

46.4

77.3

  1. Mean bias mean difference between EEVCO2 and measured EE, p values: paired Student t tests, accuracy rates proportion of EEVCO2 values within 5% or 10% of the measured EE
  2. SD standard deviation, CI confidence intervals, EEVCO 2 _0.85 EE calculated using measured CO2 consumption (VCO2) and fixed respiratory quotient (RQ) of 0.85, EEVCO 2 _FQ EE calculated using VCO2 and the food quotient as the RQ
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Critical Care

ISSN: 1364-8535