Skeletal Muscle Area on CT: Determination of an Optimal Height Scaling Power and Testing for Mortality Risk Prediction
Louis Blankemeier, Lawrence Yao, Jin Long, Eduardo Pontes Reis, Leon Lenchik, Akshay Chaudhari, Robert D. Boutin
Abstract
BACKGROUND: Sarcopenia is commonly assessed on CT using the skeletal muscle index (SMI), calculated as skeletal muscle area (SMA) at L3 divided by patient height squared (i.e., height scaling power of 2).
Topics & Concepts
MedicineLinear regressionStatisticsAllometryRegression analysisSarcopeniaScalingProportional hazards modelSample size determinationPower functionStatistical powerSMA*Internal medicineMathematicsAlgorithmGeometryMathematical analysisBiologyEcologyNutrition and Health in AgingFrailty in Older AdultsBody Composition Measurement Techniques