略語大辞典 [Med] 9 LBM lean body mass 蛋白指数. 尿中のクレアチニンのレベルから計算する.lean body mass; a measure of protein; creatine within muscle is metabolized to creatinine, which is then excreted in theurine. LBM may be calculated by measuring 24-hour urinary creatinine level; ref. REE(resting energy expen 丸善「略語大辞典」JLogosID : 11880295