3.2 Complications
After the patients received different treatments, we counted the incidence of complications in ITD group and ITL group. As showed in table 3, compared with the ITL group, the incidences of external auditory meatus mycosis (p = 0.029) and tympanic membrane thinning (p = 0.018)were significantly higher in the ITD group which had been further elaborated in section 3.3 and 3.4.In addition, two patients in the ITD group had perforation accompanied by external auditory meatus mycosis, and one of them had recovered from the perforation after active treatment which had been elaborated in section 3.4. .No tympanic membrane perforation was observed in the ITL group. There was no statistical difference in the incidence of vertigo, pain, tongue numbness, tinnitus and other complications between the two groups.