Differences in Clinical Characteristics and Brain Activity between Patients with Low- and High-Frequency Tinnitus

Table 1

Electroencephalogram characteristics of patients with low- and high-frequency tinnitus.

Tinnitus patients		Age (yrs)	Sex	Tinnitus laterality	THI	Tinnitus pitch	Loudness	Duration (months)	PTA (≤2 kHz)	PTA (>2 kHz)
LFT	1	36	M	L	4	350	40	7	5	6.25
	2	52	F	R	40	200	30	120	13.75	13.75
	3	29	M	R	78	150	40	3	6.25	5
	4	48	F	L	30	150	42	3	10	10
	5	41	F	R	0	500	60	96	13.75	13.75
	6	38	M	L	10	125	25	12	7.5	8.75
	7	31	F	L	12	200	45	36	11.25	11.25
	8	30	F	R	26	120	48	36	6.25	7.5
	9	24	M	L	38	120	45	3	16.25	17.5
	10	33	F	R	36	100	36	3	8.75	8.75
			4 M/6F	5 L/5R		—
HFT	11	60	F	R	20	8000	35	6	21.25	22.5
	12	27	M	R	22	8000	5	12	6.25	7.5
	13	31	M	L	8	8000	28	6	3.75	3.75
	14	24	F	R	20	4000	55	6	0	-1.25
	15	22	F	L	6	8000	48	96	3.75	3.75
	16	55	F	R	55	8000	41	36	5	7.5
	17	26	M	L	22	8000	25	6	-2.5	-2.5
	18	53	F	L	18	4000	30	12	15	16.25
	19	40	F	R	38	8200	31	6	6.25	8.75
	20	26	M	L	34	6000	33	12	16.25	17.5
			4 M/6F	5 L/5R		—
value		0.932	0.714	0.653	0.902	—	0.134	0.306	0.387	0.492

L: left; R: right; F: female; M: male; PTA: pure-tone threshold audiometry; HFT: high-frequency tinnitus; LFT: low-frequency tinnitus; SD: standard deviation.