Figure 2.

Classification and regression tree models for measures of lean mass, body size, and lean mass standardized to body size discriminating weakness in older men and women in the FNIH (Foundation for the National Institutes of Health) Sarcopenia Project. Model included the following potential discriminators of weakness (grip strength <16kg in women and <26kg in men): ALM (appendicular lean mass), height, weight, height2, total body fat (TBF), BMI (body mass index), ALM_height (ALM/height), ALM_weight (ALM/weight), ${\text{ALM}}_{{\text{height}}^{\text{2}}}$ (ALM/height2), ALM_BMI (ALM/BMI), ALM_TBF (ALM/TBF), LLM_height (LLM/height; LLM = leg lean mass), LLM_weight (LLM/weight), ${\text{LLM}}_{{\text{height}}^{\text{2}}}$ (LLM/height2), LLM_TBF (LLM/TBF), and ALM_BMI (LLM/BMI).