ArticleThe Laryngoscope2025
External Auditory Canal Exostosis and the California Surfer Population: A Cross-Sectional Study.
Article in The Laryngoscope, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
objectivesCalifornia has the most surfers in the United States and a high prevalence of external auditory canal exostoses (EACEs) among them. We aimed to characterize their EACE knowledge, use of earplugs, and barriers toward earplug use.
methodsA RedCap survey was distributed to online surfing forums and surfers at California beaches. Descriptive statistics and regression analyses were used to characterize responses.
resultsOur cohort included 334 primarily male (n = 269, 81.52%), college-educated (n = 237, 71.17%) surfers who were on average 30.79 years old (SD = 11.07). Two hundred and ninety-seven (90.00%) heard of EACE and 317 (96.06%) believed earplugs prevent EACE. However, 214 (64.85%) had never used earplugs. Multivariable logistic regression found increased age (OR = 1.04, 95% CI = [1.00-1.08], p = 0.03), higher EACE knowledge quiz scores (OR = 1.47, 95% CI = [1.19-1.80], p < 0.001), and primarily surfing in Southern California (OR = 2.19, 95% CI = [1.15-4.16], p = 0.02) increased the likelihood of earplug use. Common reasons against earplug use included reduced hearing, discomfort, and social hindrance. Two hundred and eighty-seven (86.45%) would wear earplugs following more EACE knowledge. They preferred learning from surf community members, doctors, and surf events.
conclusionLow earplug use despite awareness of EACE preventability suggests a need for EACE education among California surfers and more accessible, user-friendly earplugs. Younger, less-skilled surfers who were more commonly unaware of EACE may represent a key intervention group. Education could be promoted through partnerships between health professionals and renowned surf organizations, as most participants indicated a willingness to use earplugs post-education. LEVEL OF EVIDENCE: NA Laryngoscope, 135:286-292, 2025.
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