Table 2.

Characteristics of sarcopenic patients (low muscle mass groups according to each indexing method and weakness) and deaths during follow-up

Variables	Low muscle mass by height2 and weakness			Low muscle mass by BW and weakness			Low muscle mass by BSA and weakness			Low muscle mass by BMI and weakness
	non-sarcopenic (n=618)	sarcopenic (n=25)	P	non-sarcopenic (n=570)	sarcopenic (n=73)	P	non-sarcopenic (n=541)	sarcopenic (n=102)	P	non-sarcopenic (n=553)	sarcopenic (n=90)	P
Black (%)	62.5	36.0	0.01	66.0	26.0	<0.001	66.4	35.3	<0.001	67.3	25.6	<0.001
Male (%)	57.4	84.0	0.01	58.1	61.6	0.56	56.6	68.6	0.02	58.4	58.9	0.93
Diabetes (%)	43.5	56.0	0.22	41.9	60.3	0.003	42.0	54.9	0.02	41.4	60.0	0.001
Age (year)	55.9±14.1	75.9±9.9	<0.001	54.3±13.3	75.2±9.1	<0.001	53.8±13.4	72.2±9.5	<0.001	54.1±13.4	72.6±9.9	<0.001
Muscle metric (units vary)	9.5±1.9	7.1±0.7	<0.001	33.7±4.2	29.2±2.3	<0.001	14.4±1.8	12.4±1.3	<0.001	1.0±0.2	0.8±0.1	<0.001
BMI (kg/m2)	28.4±7.0	21.8±2.0	<0.001	28.0±7.0	29.5±6.4	0.09	28.8±7.3	25.0±3.7	<0.001	28.1±7.1	28.6±6.3	0.52
Percent fat (%)	30.0±10.2	25.9±10.7	0.045	29.1±10.4	35.6±6.3	<0.001	29.8±10.5	30.4±8.9	0.56	29.2±10.4	33.8±8.2	0.0001
Serum creatinine (g/dl)	8.5±2.7	6.6±2.2	0.001	8.6±2.7	6.6±2.0	<0.001	8.7±2.8	7.0±2.1	<0.001	8.7±2.7	6.8±2.1	<0.001
Serum albumin (g/dl)	4.0±0.4	3.8±0.3	0.03	4.0±0.4	3.9±0.4	0.01	4.0±0.3	3.9±0.4	0.005	4.0±0.4	4.0±0.3	0.31
Death during follow-up (%)	69 (11.2)	<10 (<40.0)	<0.001	61 (10.7)	17 (23.3)	0.002	55 (10.2)	23 (22.5)	<0.001	58 (10.5)	20 (22.2)	0.002
Death rate (per 100 patient- years)	5.9 [4.6, 7.4]	24.7 [12.8, 47.4]	<0.001	5.6 [4.4, 7.2]	13.9 [8.7, 22.4]	0.001	5.3 [4.1, 6.9]	13.4 [8.9, 20.2]	0.0001	5.5 [4.2, 7.1]	13.3 [8.6, 20.6]	0.0004

Data are presented as mean ± SD, n (%), and [95% confidence interval]