Incidence of Self-Reported Bothersome Tinnitus Versus Tinnitus Diagnosis Among U.S. Army Soldiers.

Purpose: U.S. Army Soldiers undergo annual audiometric surveillance to facilitate prevention of auditory injury. Soldiers are screened for bothersome tinnitus and subsequently referred for a clinical audiological evaluation as warranted. Presumably, most Soldiers seen in the clinic for bothersome tinnitus receive a tinnitus diagnosis. The incidence of self-reported bothersome tinnitus at the time of annual audiometric surveillance and subsequent diagnosis of tinnitus in the medical record has not been examined to date. This study estimated the incidence of tinnitus diagnosis in a population of Soldiers who reported new onset bothersome tinnitus and explored trends associated with tinnitus diagnosis to refine hearing health education.

Method: A subset of hearing conservation records retrieved for a previous study were selected based on change in self-reporting of bothersome tinnitus. Corresponding medical records were retrieved for this sample of Active Duty (AD) Soldiers. The data were retrospectively examined, and analyses were conducted to identify statistically significant differences between Soldiers with and Soldiers without a tinnitus diagnosis. In addition, trend patterns of bothersome tinnitus and significant threshold shift (STS) were examined.

Results: Of the sample of 730,350 AD Soldiers, 16.7% self-reported new onset bothersome tinnitus and 7.1% of those recorded as having bothersome tinnitus had a diagnosis of tinnitus in their medical record. Soldiers with a tinnitus diagnosis were older and had higher pure-tone averages than Soldiers without a tinnitus diagnosis. Counterintuitively, overall trend percentages of bothersome tinnitus increased per calendar year, while the percentages of STS decreased throughout the study period.

Conclusions: The rate of tinnitus diagnosis in the medical record is vastly lower than the prevalence of bothersome tinnitus recorded in the annual surveillance system. Steps should be taken to screen, refer, and diagnose tinnitus more consistently. Based on the outcome of the study analysis, we recommend that screening for bothersome tinnitus more closely follows procedure recommendations from the Department of Veterans Affairs and Department of Defense (VA/DOD) Tinnitus Working Group, which may reduce the rate at which Soldiers report bothersome tinnitus.