Table 7. Number of Inpatients by Frequent Disease according to Year

Frequent Disease/Year	2018	2019	2020	2021	2022	χ2(p)
Sudden hearing loss	13(11.2%)	36(31.0%)	32(27.6%)	24(20.7%)	11(9.5%)	66.120 (.002) p<.05
Tinnitus	11(32.4%)	7(20.6%)	6(17.6%)	7(20.6%)	3(8.8%)
Benign paroxysmal positional vertigo	5(16.7%)	9(30.0%)	6(20.0%)	5(16.7%)	5(16.7%)
Urticaria	7(26.9%)	3(11.5%)	8(30.8%)	6(23.1%)	2(7.7%)
Eczema	4(16.0%)	12(48.0%)	4(16.0%)	2(8.0%)	3(12.0%)
Herpes zoster	5(21.7%)	5(21.7%)	5(21.7%)	6(26.1%)	2(8.7%)
Laryngopharyngitis	16(69.6%)	1(4.3%)	2(8.7%)	0(0.0%)	4(17.4%)
Meniere's syndrome	4(18.2%)	4(18.2%)	5(22.7%)	7(31.8%)	2(9.1%)
Vestibular neuritis	5(29.4%)	2(11.8%)	4(23.5%)	3(17.6%)	3(17.6%)
Hearing loss(except sudden hearing loss)	2(15.4%)	4(30.8%)	3(23.1%)	2(15.4%)	2(15.4%)