3.1. Demographics
There were 274 (137 study group and 137 control group) CI users in the
study. IP-II constituted the most common subjects who were 40 of 137
anomalies (29.19%) in this study. Other malformations included IP-I (n:
36, 26.2%), cochlear hypoplasia (n: 26, 18.9%), EVA (n: 14, %10.2),
IP-III (n: 10, %7.2), common cavity (n: 8, 5.8%) and dilatation of
vestibule (n: 3, 2.1%). The results of children showed varying data
depending on the types of IEMs, and auditory performances were ranked to
order from high to low.