A clinico-statistical analysis was performed on 35 cases of mutational disturbance at Dept. of Otolaryngology of Ewha Womans University Hospital during past 5 years and the following results were obtained.
1) Among 35 cases of mutational disturbance, continuation of mutational disturbance were 11 cases, 9 cases were male(25.7%) and 2 cases were female(5.7%).
2) Among 15 cases of phonasthenia, 5 cases were male(14.3%) and 10 cases were female(28.6%).
3) Among 9 cases of vocal cord atrophy, 6 cases were male(17.1%) and 3 cases were female(8.6%).
4) The age distribution of mutational disturbance in order of frequency were obtained as follows. Among 11 cases of continuation of mutational disturbance, 21~ 25year old group were 5 cases(45.5%), 15-20 and 31~35year old group were 2 cases(18.2%) each. Among 15 cases of phonasthenia, 26~30year old group were 6 cases(40.0%), 31~35year old group were 3 cases(20.0%). Among 9 cases of vocal cord atrophy, 26~30year old group and 31~35year old group were 2 cases(33.3%) each.
5) Duration of visit after voice disturbance in order of frequency were 1~2year group 10 cases(28.6%), 3~5year group 9 cases(25.7%) and 6month~lyear group 4 cases(11.4%).
6) Other symptoms except voice disorder in order of frequency were dry sensation of pharyngolarynx, foreign body sensation of pharyngolarynx, neurasthenia, general fatigue, pain of neck and shoulder area.
