Table 2.

Factors significantly correlated with log CK in ALS patients by multivariate linear regression analysis.

Variables	Estimated parameter (β)	SE	95% CI	T	p-Value
Sex	0.177	0.054	0.070–0.284	3.260	0.001
Site of onset	0.254	0.063	0.129–0.378	4.033	<0.001
Serum Cr	0.005	0.002	0.001–0.009	2.580	0.011
SP score	0.025	0.012	0.002–0.049	2.110	0.037

CI, confidence interval; Cr, creatinine; ALS, amyotrophic lateral sclerosis; CK, creatine kinase; SP, spontaneous potential.