Table 1.

Participants' characteristics at admission (n = 404)

Characteristics	Median (25th–75th percentile), n (%), or mean ± standard deviation
Age (years)	83.0 (77.0–88.0)
Sex (male/female)	183 (45.3)/221 (54.7)
Body weight (kg)	46.4 (39.5–53.9)
Height (cm)	152.0 (146.3–161.0)
Body mass index (kg/m2)	19.9 (17.5–22.5)
Quadriceps echo intensity (0–255) a	84.7 ± 21.7
Quadriceps thickness (cm)	1.2 (0.9–1.5)
Subcutaneous fat thickness of the thigh (cm)	0.4 (0.3–0.5)
Barthel Index score at admission	40.0 (20.0–60.0)
Food Intake Level Scale	8.0 (7.0–9.0)
Geriatric Nutritional Risk Index score	87.6 (80.0–93.8)
C‐reactive protein (mg/dL)	0.5 (0.4–1.7)
Serum albumin (g/dL)	3.4 (3.0–3.7)
Updated Charlson Comorbidity Index score	2.0 (0.0–3.0)
Number of medications	7.0 (5.0–10.0)
Number of rehabilitation therapy (units/day)	3.0 (2.0–4.0)

^a Greyscale.