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Psoas index by age in normal control group. The average psoas index values for males in the normal control group aged <55, 55–64, 65–74, and ≥75 years were 6.50 ± 1.13, 6.35 ± 1.45, 5.98 ± 1.24, and 5.40 ± 1.23 cm2/m2, respectively, while those for females were 4.30 ± 0.90, 4.20 ± 0.94, 4.15 ± 1.02, and 4.27 ± 1.12 cm2/m2, respectively
