Dermatophytosis includes all fungal infections caused by dermatophytes in humans. Some risk factors for the development of subtypes of dermatophytosis have been studied; however, large-scale epidemiologic studies on risk factors for total dermatophytosis are scarce. We investigated the risk factors of dermatophytosis using a nationwide study. Total 4,532,655 subjects with dermatophytosis aged between 20 and 40 years were examined using data from the Korean National Health Insurance Service from 2009 to 2018. Women showed a lower risk of development of dermatophytosis compared to men [hazard ratio (HR) 0.848; 95% confidence interval (CI) 0.843–0.853]. Subjects with elevated waist circumference (HR 1.057; 95% CI 1.048–1.065), heavy drinking (HR 1.053; 95% CI 1044–1.061), engaging in mild-to-heavy exercise (HR 1.071; 95% CI 1.064–1.077) had a higher risk of dermatophytosis. In addition, subjects with body mass index (BMI) of more than 30 kg/m2 exhibited a higher risk of dermatophytosis (HR 1.36; 95% CI 1.342–1.378) compared to those with BMIs in the range of 18.5–23 kg/m2. In this study, the risk of developing dermatophytosis significantly increased in individuals with elevated waist circumference or high BMI. Lifestyle modifications, including weight management, are suggested to be important in preventing dermatophytosis.
Dermatophytosis includes all fungal infections caused by dermatophytes in humans. Some risk factors for the development of subtypes of dermatophytosis have been studied; however, large-scale epidemiologic studies on risk factors for total dermatophytosis are scarce. We investigated the risk factors of dermatophytosis using a nationwide study. Total 4,532,655 subjects with dermatophytosis aged between 20 to 40 years were examined using data from the Korean National Health Insurance Service from 2009 to 2018. Women showed a lower risk of development of dermatophytosis compared to men (hazard ratio [HR], 0.848; 95% confidence interval [CI], 0.843–0.853). Subjects with elevated waist circumference (HR, 1.057; 95% CI, 1.048–1.065), heavy drinking (HR, 1.053; 95% CI, 1044–1.061), engaging in mild-to-heavy exercise (HR, 1.071; 95% CI, 1.064–1.077) had a higher risk of dermatophytosis. In addition, subjects with body mass index (BMI) of more than 30 kg/m2 exhibited a higher risk of dermatophytosis (HR, 1.36; 95% CI, 1.342–1.378) compared to those with BMIs in the range of 18.5 to 23 kg/m2. In this study, the risk of developing dermatophytosis significantly increased in individuals with elevated waist circumference or high BMI. Lifestyle modifications, including weight management, are suggested to be important in preventing dermatophytosis.
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