Prevalence of asymptomatic rotator cuff tear and their related factors in the Korean population

Background: No information is available about asymptomatic rotator cuff tears (RCTs) in the Korean population. This study evaluated the prevalence of rotator cuff tears without symptoms and their related risk factors. Materials and methods: The study included 486 volunteers (70.4% female; mean age, 53.1; range, 2082 years) without any shoulder symptom complaints. Background data, medical history, clinical self-assessment, and physical examination were recorded. An ultrasonographic examination was conducted to identify rotator cuff pathology, but only full-thickness RCTs (FTRCTs) were included for the statistical analysis. Results: FTRCTs were found in 23 subjects (4.7%) but only in those aged >= 49 years. Subjects aged 5059, 60-69, and >= 70 years of age had FTRCT prevalence rates of 3.5%, 13.3%, and 11.1%, respectively. The prevalence of FTRCTs was higher in subjects with diabetes (P = .042) and a smoking history (P = .002), but no differences were noted for the presence of thyroid disease (P = .051). Almost half of those who had FTRCTs had some pain and limited daily activity that was not bothersome. After excluding these subjects from the analysis, the prevalence of asymptomatic FTRCTs decreased to 2.3%. Conclusions: The prevalence of asymptomatic FTRCTs was lower than expected. Half of asymptomatic FTRCTs were not actually symptom free after the clinical and physical assessments. The risk factors for a FTRCT were age, diabetes, and smoking.(C) 2017 Journal of Shoulder and Elbow Surgery Board of Trustees. All rights reserved.