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The Scientific World Journal
Volume 2013, Article ID 596076, 7 pages
http://dx.doi.org/10.1155/2013/596076
Clinical Study

Efficacy of Low-Level Laser Therapy in the Management of Tinnitus due to Noise-Induced Hearing Loss: A Double-Blind Randomized Clinical Trial

1Department of Occupational Medicine, School of Medicine, Shahid Sadoughi University of Medical Sciences, P.O. Box 89138-14389, Yazd, Iran
2Cardiovascular Research Center, Isfahan Cardiovascular Research Institute, Isfahan University of Medical Sciences, P.O. Box 81465-1148, Isfahan, Iran
3Department of Otolaryngology and Head and Neck Surgery, School of Medicine, Yazd University of Medical Sciences, P.O. Box 89138-14389, Yazd, Iran
4Industrial Diseases Research Center, School of Medicine, Shahid Sadoughi University of Medical Sciences, P.O. Box 89138-14389, Yazd, Iran
5Shahid Rahnamoun Hospital, Farrokhi Ave, Yazd, Iran

Received 1 June 2013; Accepted 12 September 2013

Academic Editors: C. Cingi and F. Oghan

Copyright © 2013 Abolfazl Mollasadeghi et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Background. Several remedial modalities for the treatment of tinnitus have been proposed, but an effective standard treatment is still to be confirmed. In the present study, we aimed to evaluate the effect of low-level laser therapy on tinnitus accompanied by noise-induced hearing loss. Methods. This was a double-blind randomized clinical trial on subjects suffering from tinnitus accompanied by noise-induced hearing loss. The study intervention was 20 sessions of low-level laser therapy every other day, 20 minutes each session. Tinnitus was assessed by three methods (visual analog scale, tinnitus handicap inventory, and tinnitus loudness) at baseline, immediately and 3 months after the intervention. Results. All subjects were male workers with age range of 30–51 years. The mean tinnitus duration was years. All three measurement methods have shown improved values after laser therapy compared with the placebo both immediately and 3 months after treatment. Laser therapy revealed a U-shaped efficacy throughout the course of follow-up. Nonresponse rate of the intervention was 57% and 70% in the two assessment time points, respectively. Conclusion. This study found low-level laser therapy to be effective in alleviating tinnitus in patients with noise-induced hearing loss, although this effect has faded after 3 months of follow-up. This trial is registered with the Australian New Zealand clinical trials registry with identifier ACTRN12612000455864).