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Intern Med. 2019 Dec 13. doi: 10.2169/internalmedicine.3943-19. [Epub ahead of print]

The Association between Earlobe Creases and Cardiovascular Events in Japanese Hemodialysis Patients: A Prospective Cohort Study.

Author information

1
Division of Comprehensive Geriatrics in Community, Niigata University Graduate School of Medical and Dental Sciences, Japan.
2
Department of Internal Medicine, Sakura Clinic, Japan.
3
Department of Internal Medicine, Medical Corporation Group Omori Medical Clinic, Japan.
4
Department of Internal Medicine, Maihira Clinic, Japan.
5
Department of Internal Medicine, Koyo Medical Clinic, Japan.
6
Department of Nephrology and Hypertension, Fukushima Medical University, Japan.
7
Division of Clinical Nephrology and Rheumatology, Niigata University Graduate School of Medical and Dental Sciences, Japan.

Abstract

Objective The earlobe crease, a wrinkle extending from the tragus to the outer border of the earlobe, is a well-known surrogate marker for a high risk of cardiovascular disease. However, information is lacking about its association with cardiovascular events among hemodialysis patients, who already have an increased risk of cardiovascular disease. We tested the hypothesis that earlobe creases are independently associated with the risk of cardiovascular events among Japanese hemodialysis patients. Methods This prospective cohort study followed 247 adult hemodialysis patients with no history of cardiovascular disease for 4 years. The presence of earlobe creases was defined by two researchers using photos of patients' earlobes on both sides while blinded to one another's assessments and clinical data. The primary outcome was defined as the first fatal or nonfatal cardiovascular event (myocardial infarction, ischemic or hemorrhagic stroke, or peripheral vascular disease requiring aortic or peripheral vascular bypass surgery or below- or above-the-knee amputation). A Fine-Gray competing risks regression model was used to examine the association between earlobe creases and cardiovascular events. Results During the 4-year follow-up period, 43 patients suffered cardiovascular events. After the competing risk of non-cardiovascular death was accounted for, patients with earlobe creases had an increased cumulative incidence of cardiovascular events compared to those without earlobe creases (subhazard ratio =2.04, 95% confidence interval: 1.09 to 3.82). This association was no longer significant after adjusting for age. Conclusion Earlobe creases were not independently associated with cardiovascular events among Japanese hemodialysis patients, suggesting that these marks are simply indicative of advanced age.

KEYWORDS:

cardiovascular disease; earlobe crease; hemodialysis patients; survival analysis

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