Objective To investigate the characteristics of clinical hearing of patients with cleft palate,and to evaluate the effects of sex;age;and surgery on the hearing results.Methods 256 cases of cleft palate,including 243 cases who had never received cleft-closure operation and 13 cases who had received cleft-closure operation for at least 5 years.To evaluate the effects of sex,we investigated 174 cases(male76,and female 98) who were under 2 years(≤2 y),they were divided into 2 groups:to evaluate the effects of ...