Table 3.

Association between ACTN3 R577X genotype and sarcopenia stratified by sex.

	Crude- β (95% CI)	p-value	Adj-βa (95% CI)	p-value	Crude-β (95% CI)	p-value	Adj-βa (95% CI)	p-value
SMMI (Kg/m2)
RR + RX	Ref		Ref		Ref		Ref
XX	− 0.12 (− 0.36 ~ 0.12)	0.322	− 0.02 (− 0.19 ~ 0.15)	0.835	0.02 (− 0.16 ~ 0.19)	0.865	0.02 (− 0.11 ~ 0.15)	0.799
Grip strength (Kg)
RR + RX	Ref		Ref		Ref		Ref
XX	− 0.15 (− 2.83 ~ 2.53)	0.910	− 0.17 (− 2.65 ~ 2.31)	0.895	1.24 (− 0.18 ~ 2.65)	0.089	1.24 (− 0.11 ~ 2.58)	0.072
Gait speed (Meters/sec)
RR + RX	Ref		Ref		Ref		Ref
XX	0.01 (− 0.10 ~ 0.11)	0.902	− 0.01 (− 0.12 ~ 0.09)	0.789	0.02 (− 0.06 ~ 0.10)	0.604	0.03 (− 0.05 ~ 0.10)	0.519
Five-time chair stand time (Sec)
RR + RX	Ref		Ref		Ref		Ref
XX	− 0.43 (− 2.00 ~ 1.13)	0.589	− 0.28 (− 1.78 ~ 1.22)	0.712	0.09 (− 1.34 ~ 1.52)	0.900	0.06 (− 1.30 − 1.43)	0.927

For binary outcomes (sarcopenia), odds ratios (OR) with 95% CI are reported, regression coefficients (β) with 95% confidence intervals (CI) are shown.

For continuous outcomes (SMMI, grip strength, gait speed, and five-time chair stand time).

^aAll result of Adj-beta were adjusted by age, BMI.