ObjectiveTo investigate the strobolaryngoscope findings and voice characteristics of patients with adductor spasmodic dysphonia.MethodsVoice data of 61 patients with adductor spasmodic dysphonia and 30 normal ones were collected and analyzed.ResultsOf the 61 patients, 51 were females. Thirtyfive patients (57.4%) had reflux finding score (RFS) more than 7 and 7 patients (11.5%) had psychological disorders. During phonation, the patients experienced excessive muscle tension. Strobolaryngoscope examination revealed tension and excessive adduction of bilateral vocal cords, laryngeal tremor without organic lesions. In the voice test, all the patients had tensive phonation during reading and interrupted voice occurred in 68.9% (42/61) of them. During reading a paragraph, the average number of interrupted voice in the patients was (1.9±2.0), which was higher than that in the normal ones (0.0±0.0),(P<0.01). The average time of reading a paragraph in the patients was (21.5±4.8)s, which was longer than that in the normal ones［(16.2±3.7)s］(P<0.01). Compared with the normal persons, the patients with adductor spasmodic dysphonia had higher shimmer and jitter, lower dysphonia severity index (DSI) and shorter maximum phonation time (MPT).ConclusionMost patients with adductor spasmodic dysphonia are female. Interrupted voice usually occurs accompanied with changes of shimmer, jitter, DSI and MPT as well as characteristic strobolaryngoscope findings. This disease may have some relationship with regurgitation of gastric juice and psychological factors may influence a minority of them.