The Impact of Low Muscle Mass Definition on the Prevalence of Sarcopenia in Older Australians

Table 2

The prevalence of low muscle mass and low grip strength in the North West Adelaide Health Study (NWAHS) and Florey Adelaide Male Ageing Study (FAMAS) based upon dual absorptiometry X-ray assessments of appendicular skeletal muscle mass.

	Low grip strength (𝑛%)	Low SMI (𝑛%)	Low SMI (𝑛%)	Low SMI (𝑛%)
	EWGSOP Criteria [6]	<2 SD below mean of younger reference group (FAMAS and NWAHS) (Table 1)	Gender specific lowest 20% of study group (FAMAS and NWAHS)	Residuals of linear regression on appendicular lean mass adjusted for fat and height (FAMAS and NWAHS)
NWAHS + FAMAS men
Cut-offs	<30 Kg	<6.89 Kg/m^2	<7.36 Kg/m^2	<−2.15 Kg
65 −< 80 (𝑛=540)	78 (14.4)	38 (7.0)	92 (17.0)	101 (18.7)
80+ (𝑛=71)	32 (45.1)	9 (12.7)	29 (40.8)	21 (29.6)
Total 65+ (𝑛=611)	110 (18.0)	44 (7.2)	121 (19.8)	122 (20)
NWAHS female
Cutoffs	<20.0 Kg	<4.32 Kg/m^2	<5.81 Kg/m^2	<−1.42 Kg
65 −<80 (𝑛=313)	105 (33.5)	0 (0)	56 (17.9)	63 (20.1)
80+ (𝑛=62)	39 (62.9)	1 (1.6)	18 (29)	12 (19.4)
Total 65+ (𝑛=375)	144 (38.4)	1 (1.6)	74 (19.7)	75 (20)