Then, they were divided into four groups, 90 in each group, according to the results of electroaudiometry and the hospitalization time: assurgent, declivous, aclinic and deaf audiometric curve groups.

• 根据患者在本院检查的电测听结果及就诊时间顺序分为4组,分别为上坡型、下坡型、平坦型及聋型电测听听力曲线组,每组90例。