Factors affecting severity of tinnitus - a follow-up study of tinnitus subjects at an Ear Nose Throat clinic in Sweden.

Objective: The aim of the present study was to examine whether perceived tinnitus severity changes over time, and if so what factors contribute to this change.

Design: A modified Swedish version of tinnitus severity questionnaire (MS-TSQ) was used to examine changes in tinnitus severity over a period of time.

Study Sample: The MS-TSQ questionnaire was completed by 455 subjects visiting an Ear, Nose and Throat (ENT) clinic in Sweden as part of baseline assessment (Sb).