This work was supported by the Alpha Omega Alpha Carolyn L. Kuckein Fellowship; Vanderbilt University School of Medicine, Emphasis Program; Deckers Outdoor Corporation/Teva Sports Sandals (material support only); and American Whitewater (material support only).
Exostoses of the external auditory canal in white-water kayakers†
Article first published online: 11 JAN 2010
Copyright © 2010 The American Laryngological, Rhinological, and Otological Society, Inc.
Volume 120, Issue 3, pages 582–590, March 2010
How to Cite
Moore, R. D., Schuman, T. A., Scott, T. A., Mann, S. E., Davidson, M. A. and Labadie, R. F. (2010), Exostoses of the external auditory canal in white-water kayakers. The Laryngoscope, 120: 582–590. doi: 10.1002/lary.20781
- Issue published online: 16 FEB 2010
- Article first published online: 11 JAN 2010
- Manuscript Accepted: 19 OCT 2009
- Manuscript Revised: 14 OCT 2009
- Manuscript Received: 17 JUL 2009
- United States/epidemiology;
- water/adverse effects;
- cold temperature/adverse effects;
- risk factors;
- cross-sectional studies;
- ear canal/pathology
Exostoses of the external auditory canal are benign bony tumors associated with frequent cold-water exposure. Obstruction may lead to conductive hearing loss and recurrent otitis externa, requiring surgical correction when symptoms become intolerable. This study aimed to characterize the prevalence of exostoses in white-water kayakers and identify associated risk factors and protective measures.
Six hundred eleven white-water kayakers from across the United States were included in the study. Percent occlusion was graded as minimal (<25%), moderate (25%–75%) or severe (>75%). Subjects completed a survey of risk factors and protective measures. Kruskal-Wallis and χ2 tests were performed to determine significant associations with percent occlusion. A multivariate proportional odds regression model was fit to adjust for confounding between the variables.
The prevalence of exostoses in kayakers was 79% (482/611); 13% (78/611) had ≥75% occlusion. Percent occlusion was associated with total years kayaked (P < .001), frequency ≥1 day/week (P < .001), male gender (P < .001), and increasing age (P = .005), although frequency, gender, and age were confounded by total years. Styles that involve repeated submersion were also associated with greater occlusion (freestyle, P = .036; squirt, P = .016). Subjects who used earplugs for a greater proportion of their kayaking career were less likely to have exostoses (P < .001). When adjusted for confounding, only total years (P = .0003) and age (P = .0027) remained significant.
Kayakers are the first inland population to experience exostoses at the rates seen in coastal populations (e.g., surfers). When used long-term, earplugs may be protective. Laryngoscope, 2010