Box 1.

LBM Estimation Equations

$${\text{LBM}}_{\text{SCr}}={0.34}^{\ast }\text{SCr}(\text{mg}/\text{dL})+{5.58}^{\ast }\{1\text{if}\text{female};0\text{if}\text{male}\}+{0.30}^{\ast }\text{weight}(\text{in}\text{kg})+{0.67}^{\ast }\text{height}(\text{in}\text{inches})-{0.23}^{\ast }\text{URR}-5.75$$

$${\text{LBM}}_{\text{HGS}}={9.09}^{\ast }\text{HGS}(\text{unit})+{5.15}^{\ast }\{1\text{if}\text{female};0\text{if}\text{male}\}+{0.33}^{\ast }\text{weight}(\text{in}\text{kg})+{0.74}^{\ast }\text{height}(\text{in}\text{inches})-29.06$$

$${\text{LBM}}_{\text{MAMC}}={0.28}^{\ast }\text{MAMC}(\text{cm})+{5.52}^{\ast }\{1\text{if}\text{female};0\text{if}\text{male}\}+{0.28}^{\ast }\text{weight}(\text{in}\text{kg})+{0.82}^{\ast }\text{height}(\text{in}\text{inches})-35.30$$

Abbreviations: LBM, lean body mass; SCr, serum creatinine; MAMC, mid-arm muscle circumference; HGS, handgrip strength; URR, urea reduction ratio.