Table 1.

Gender- and age-specific cut-off values for sarcopenia

Characteristics	Male		Female
	<50 years old	>50 years old	<50 years old	>50 years old
Number	20	43	16	20
Age yrs(mean±SD)	40.5±6.7	59.9±6.6	43.5±4.5	60.9±6.3
BMI kg/m2(mean±SD)	23.6±1.8	23.9±1.2	24.3±0.9	23.4±1.8
Psoas muscle
Absolute cm2
5th percentile	39.48	31.80	35.10	29.25
20th percentile	41.05	34.08	35.60	30.79
Normalized (cm2/h2)
5th percentile	12.27	10.12	10.47	10.33
20th percentile	13.74	10.66	11.69	11.54
Paraspinal muscle
Absolute cm2
5th percentile	61.03	53.51	48.49	45.51
20th percentile	64.33	58.02	52.40	48.91
Normalized (cm2/h2)
5th percentile	20.43	16.21	17.79	15.26
20th percentile	22.19	18.73	18.46	17.71
Abdominal wall muscle
Absolute cm2	84.77	67.39	60.21	42.48
5th percentile	89.58	73.05	63.65	50.32
20th percentile
Normalized (cm2/h2)	26.93	22.39	21.11	15.10
5th percentile	30.96	23.61	23.22	18.99
20th percentile
Total muscle
Absolute cm2
5th percentile	189.27	156.62	149.03	120.91
20th percentile	199.56	164.60	152.94	132.84
Normalized (cm2/h2)
5th percentile	60.09	48.97	53.43	41.28
20th percentile	67.00	53.81	54.69	49.59
Visceral fat
Absolute cm2
5th percentile	78.91	101.33	103.04	127.40
20th percentile	92.22	121.04	116.10	134.03
Normalized (cm2/h2)
5th percentile	24.71	32.67	34.48	47.47
20th percentile	31.21	36.86	37.94	51.53
Subcutaneous fat
Absolute cm2
5th percentile	157.66	182.64	198.19	209.73
20th percentile	175.87	199.80	209.39	231.86
Normalized (cm2/h2)
5th percentile	51.16	53.57	59.45	78.91
20th percentile	56.55	53.84	73.16	87.40