Sarcopenia definition
| Sarcopenia threshold | Relation | Studies, n |
| Intrinsic to cohort | 10 | |
| Lowest quartile for gender | 4 | |
| Below median | 2 | |
| Below sex-based mean | 1 | |
| 5th percentile for gender | 1 | |
| <80% of estimated CSA | 1 | |
| Below optimal sex-specific cut-off point established by analysis | 1 | |
| Extrinsic to cohort | 4 | |
| SMI<38.5 cm2/m2 in women (<52.4 cm2/m2 in men) 39 | 2 | |
| ASMM:height ratio <5.46 kg/m220 | 1 | |
| SMI<4 cm2/m2 | 1 | |
| Not specified | 4 |
ASMM, appendicular skeletal muscle mass; CSA, cross-sectional area; SMI, skeletal muscle index.