Table 1 Demographic and clinical profile
|  | Low muscle mass (n = 34) | Preserved muscle mass (n = 116) | P-value |
|---|---|---|---|
Patient Characteristics (median, IQR) | |||
 Age | 75 (63,83) | 63 (52,69) | < 0.001 |
 Female | 11 (32.4%)  | 52(44.8%)  | 0.238 |
 BMI (kg/m2) | 24 (21, 29) | 29 (25,34) | < 0.001 |
 Height (cm) | 174 (166, 182) | 170 (161,177) | 0.062 |
 Weight (kg) | 74 (59, 88) | 87 (70,99) | 0.032  |
 Race |  |  | 0.270 |
  Asian | 1 (2.9%) | 0 |  |
  Black or African American | 2 (5.9%) | 9 (7.8%) |  |
  Two or More Races | 0 | 3 (2.6%) |  |
  White | 31 (91.2%) | 95 (81.9%) |  |
Medical Co-morbidities | |||
 Diabetes mellitus | 11 (32.4%)  | 39(33.6%)  | 1 |
 Heart failure | 6 (17.6%)  | 21(18.1%)  | 1 |
 Kidney transplant | 0 | 1 (0.9%)  |  |
 End-stage kidney disease | 0 | 4 (3.4%)  |  |
 On hemodialysis | 0 | 0 |  |
Illness severity (median, IQR) | |||
 SOFA | 7 (4, 10) | 5 (4, 7) | 0.025  |
 APACHE II | 19 (14, 25) | 15 (11, 21) | 0.019  |
Skeletal muscle area, cm2 (mean, SD) | |||
 Males | 116.2 ± 13.6 | 159.0 ± 20.8 | < 0.0001 |
 Females | 74.5 ± 9.3 | 115.4 ± 21.6 | < 0.0001 |
Skeletal muscle index, cm2/m2 (mean, SD) | |||
 Males | 36.8 ± 3.3 | 51.3 ± 7.1 | < 0.0001 |
 Females | 28.0 ± 2.9 | 44.8 ± 7.3 | < 0.0001 |