Epidemiological survey of corns and calluses on the soles

Kitakawa Maki, Den Hiroki, Murakuni Minoru, Kokaze Akatsuki, Sueki Hirohiko

doi:10.14930/jshowaunivsoc.81.325

Corns and calluses are commonly encountered by dermatologists. Although they may be clinically distinguished, they reflect identical pathological conditions. Data on age, sex, and sites of occurrence of corns and calluses were collected from the medical records of 2,133 patients who visited a dermatology clinic from 2008 to 2018. The similarities and differences between the epidemiology of corns and calluses were identified. Next, we explored patient backgrounds and corn/callus onsets from a lifestyle perspective. Combined corns and calluses were more common than single lesions, regardless of age. The male-to-female ratio was 1：2.1; females thus predominated. Of all patients, 34.4％ had both corns and calluses, more commonly admixed in the same regions as not. The peak （both sexes） aged 30-39 years. In older males, corns were more common outside the soles; in younger ones, corns were more common on the middle toes. In females, the sites of corns were more common on the middle toes of the elderly but not on the outsides of the soles of the younger （Post-hoc analysis, p＜0.001）. According to the post-hoc analysis of the Chi-square test, calluses in young females were most common on metatarsal joints two and three （p＜0.001）. Callus-prone sites differed between those who wore high-heeled shoes and those who did not （p＜0.001）. On the post-hoc analysis of the Chi-square test, the calluses of those who wore high-heeled shoes were most common on metatarsal joints two and three （p＜0.001）. As the most common sites of corns and calluses differ by age and gender, it is crucial to identify the risk factors involved to reduce recurrence.

Epidemiological survey of corns and calluses on the soles

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