Table 2. Correlation coefficients (r) in patients with MD.

Variables	Height (cm)		Weight (kg)		BMI (kg/m2)		SMI (kg/m2)		ASMI (kg/m2)
	r	p	r	p	r	p	r	p	r	p
Age (y)	0.034	0.750	0.262*	0.013	0.240*	0.023	0.123	0.252	0.153	0.154
Age at onset (y)	0.112	0.297	0.382**	0.000	0.342**	0.001	0.309**	0.003	0.290**	0.006
NMDAS score	-0.249*	0.019	-0.298**	0.005	-0.249*	0.018	-0.280**	0.008	-0.325**	0.002
Muslce strength	0.154	0.151	0.270*	0.010	0.270*	0.010	0.469**	0.000	0.405**	0.000
UGS (m/s)	0.186	0.081	0.190	0.075	0.121	0.259	0.278**	0.008	0.252*	0.017

BMI, body mass index; SMI, skeletal muscle mass index; ASMI, appendicular skeletal muscle mass index; y, years; NMDAS, Newcastle Mitochondrial Disease Adult Scale; UGS, usual gait speed.

^* statistical significance (p < 0.05).

^**statistical significance (p < 0.01).