Table 1.

Baseline characteristics and symptoms of patients with idiopathic sudden sensorineural hearing loss (ISSNHL) and patients with non-idiopathic sudden sensorineural hearing loss (NISSNHL)

Patients´ characteristics	All patients		NISSNHL		ISSNHL
	N	%	N	%	N	%	p
Gender
Male	294	51.2	45	53.6	251	50.8	0.218
Female	280	48.8	39	46.6	239	49.2
Side
Right	277	48.3	46	54.8	231	47.1	0.197
Left	297	51.7	38	45.2	259	52.9
Tinnitus
Yes	351	61.1	49	51.4	302	61.6	0.743
No	214	37.3	33	31.3	181	36.9
n.a	9	1.6	2	2.4	7	1.4
Vertigo
Yes	175	30.5	27	32.1	148	30.2	0.605
No	396	69	56	66.7	340	69.4
n.a	3	0.5	1	1.2	2	0.4
	Mean	SD	Mean	SD	Mean	SD
Age	57.2	16.0	55.7	15.9	58.7	15.8	0.100

n.a. not available, SD standard deviation