Table 2. Cut off points of ALMI (kg/m²) in non-arthritis controls, for defining a low muscle mass for age, stratified for gender and age categories (mean minus two times SD).

	Number	Mean males in kg/m2	Cut off males in kg/m2
50–59 years	198	8.8 (1.0)	<6.7
60–69 years	137	8.5 (0.9)	<6.8
70–85 years	53	8.1 (0.8)	<6.6
		Mean females	Cut off females
50–59 years	453	7.0 (0.9)	<5.3
60–69 years	360	6.9 (0.8)	<5.3
70–86 years	67	7.0 (0.8)	<5.4

ALMI: appendicular lean mass index, n: number, SD: standard deviation