Table 1. Methods frequently used for the assessment of muscle mass in renal disease in research and in clinical practice.

Research	Clinical practice
Bioimpedance analysis (BIA) (surrogate method)	Anthropometry (surrogate method)
Dual energy X-ray absorptiometry (DXA)	BIA (surrogate method)
Computed tomography (CT)	Lumbar (L3) muscle cross-sectional area by CT
Magnetic resonance imaging (MRI)	DXA
Ultrasound	Ultrasound (?)