Using the data on body weight and BMR of 90 patients with progressive muscular dystrophy under the medical care at a sanatorium, a correlation analysis was conducted between relative body weight ratio (ratio of the patients body weight to its standard value) and %BMR (ratio of the patients BMR to its standard).
A statistically significant correlation between both values was found, and the regression equation was expressed as
y=-0.99
x+178.1, wherein
x and
y are relative body weight ratio and %BMR, respectively.
The above expression enables us to estimate the basal metabolism (BM) of each patient according to the following order:
1) Calculation of relative body weight ratio.
2) Calculation of %BMR by substituting for the above expression.
3) Determination of the correction coefficient for the difference of body weight. Correction coefficient for body weight=%BMR×10
-24) Calculation of estimated BMR (kcal/kg/day). Estimated BMR=BMR standard value by age×3)
5) Calculation of estimated BM (kcal/day).
Estimated BM=patient's body weight×4)
Variation rate between estimated BM value and actual BM value showed a normal distribution and its 84.4% was distributed within ± 15%.
As above method is useful for estimating the BM of patients with PMD, we propose above expression as a prediction formula for PMD patient's %BMR.
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