Delay in diagnosis of muscle disorders depends on the subspecialty of the initially consulted physician

Table 2 Associations with time to diagnosis: results from univariable and multiple regression analysis.

Variable	Univariable regression			Multiple regression*
	β**	95% CI	p-value	β**	95% CI	p-value
Gender	0.276	0.202 - 1.127	0.005	0.281	0.212 - 1.152	0.008
Education	0.115	-0.166 - 0.616	0.257
Age at onset	0.234	0.101 - 1.069	0.018
Type of disease
Inherited muscle diseases	0.212	0.041 - 0.979	0.033	0.260	0.170 - 1.088	0.008
Acquired muscle diseases	-0.165	-1.048 - 0.092	0.099
SMA III and IV	-0.099	-1.031 - 0.343	0.323
Subspecialty
Neurologist	-0.120	-1.071 - 0.261	0.230
General practitioner	-0.113	-0.769 - 0.209	0.259
Non-neurological specialist	0.196	0.01 - 0.937	0.05	0.226	0.085 - 1.004	0.021

Note. β = standardized regression coefficient; CI = confidence interval; SMA = spinal muscle atrophy
*multiple linear regression analysis with forward selection

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