• Assessment
    In obese adults, what is the group mean error in estimating resting metabolic rate (RMR) compared to measured RMR when using the Owen et al formula?
    • Conclusion

      One high quality research methods study reported group RMR mean overestimation error of 132 kcals/day and underestimation error of 137 kcals/day in U.S.-residing males and females, respectively. Three high quality research methods design study report underestimation errors in Italian women using the Owen, et al. equation with group mean underestimation errors around 10%. In the study that included men (DeLorenzo), group mean underestimation errors also occured.

    • Grade: I
      • Grade I means there is Good/Strong evidence supporting the statement;
      • Grade II is Fair;
      • Grade III is Limited/Weak;
      • Grade IV is Expert Opinion Only;
      • Grade V is Not Assignable.
      • High (A) means we are very confident that the true effect lies close to that of the estimate of the effect;
      • Moderate (B) means we are moderately confident in the effect estimate;
      • Low (C) means our confidence in the effect estimate is limited;
      • Very Low (D) means we have very little confidence in the effect estimate.
      • Ungraded means a grade is not assignable.
    In studies of non-obese or non-obese and obese adults, what are the group mean errors in estimating resting metabolic rate (RMR) compared to measured RMR when using the Owen et al formula?
    • Conclusion

      The Owen, et al. validation studies reported a group mean prediction error of zero for men and women (representing all weight classifications) with a standard deviation of +/- 215 kcals/day and +/-152 kcals/day, respectively. In both studies, there were wide 95% confidence intervals representing large variations. Another U.S. study reported a group mean underestimation error rate in males and females (of all weights) by <1% and approximately 4%, respectively. A large variation was found in studies in women residing in other countries such as young adult women residing in Italy (i.e., 95% confidence interval of 87-120% using mean measured to predicted ratio %).  

    • Grade: I
      • Grade I means there is Good/Strong evidence supporting the statement;
      • Grade II is Fair;
      • Grade III is Limited/Weak;
      • Grade IV is Expert Opinion Only;
      • Grade V is Not Assignable.
      • High (A) means we are very confident that the true effect lies close to that of the estimate of the effect;
      • Moderate (B) means we are moderately confident in the effect estimate;
      • Low (C) means our confidence in the effect estimate is limited;
      • Very Low (D) means we have very little confidence in the effect estimate.
      • Ungraded means a grade is not assignable.