Association Between A1c and Cutaneous Dermatophytosis: A Case–Control Study

Nicole Ufkes, Zachary Hopkins, John Skylar Westerdahl, Scott R. Florell
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Abstract

Background

Patients with diabetes have an increased risk of certain dermatophytoses. However, less is known about dermatophyte infections in pre-diabetic patients, or how A1c impacts risk.

Objectives

Assess the relationship between recent (< 1 year) HgbA1c status and odds of cutaneous dermatophyte infection.

Methods

Case–control study of patients seen at the University of Utah Dermatology Department between January 1, 2015 and December 21, 2022. Tinea cases were identified by ICD-10 codes and required the diagnosis be made by a dermatologist. Controls included patients seen in the dermatology department but who had no known diagnosis (past or current) of dermatophyte infection and were seen in a context where tinea could have been identified (i.e., no surgical visits, suture removals, spot checks, and cosmetic visits) and did not have a potentially confounding condition (inflammatory rashes). The primary exposure examined was averaged HgbA1c 1 year before index visit. Secondary exposures included HgbA1c 3 months, 3–6 months, and 6–12 months before visit as well as 3 months after the visit. Sensitivity analysis was performed using categorised Hgb A1c and historical diagnosis of diabetes.

Results

There was a 1.16-fold increase in the odds of tinea per point increase in averaged pre-visit A1c (odds ratio [OR] 1.16; confidence interval [CI] 1.11–1.22). The odds of tinea for a given HgbA1c were higher for cutaneous tinea as compared to onychomycosis and tinea capitis. The odds of tinea were attenuated when adjusting for age and sex but remained significant (OR = 1.09; CI 1.03–1.15).

Conclusions

There was an association between averaged HgbA1c over the year before a visit and odds of tinea infection. This association was similar for individual A1c periods and was more pronounced for tinea infections outside of onychomycosis and tinea capitis. These data may support HgbA1c screening in patients with new dermatophytoses, or conversely may increase the suspicion of cutaneous dermatophytosis if HgbA1c is elevated.

糖化血红蛋白与皮肤皮肤病的关系:一项病例对照研究
背景:糖尿病患者患某些皮肤病的风险增加。然而,对于糖尿病前期患者的皮肤真菌感染,或者A1c如何影响风险,我们知之甚少。目的评估近期(1年)糖化血红蛋白水平与皮肤皮肤真菌感染几率的关系。方法对2015年1月1日至2022年12月21日在犹他大学皮肤科就诊的患者进行病例对照研究。通过ICD-10代码确定癣病例,并要求皮肤科医生做出诊断。对照组包括在皮肤科就诊的患者,但没有已知的皮肤真菌感染诊断(过去或现在),并且在可以确定癣的环境中就诊(即,没有手术就诊,缝线拆除,抽查和美容就诊),并且没有潜在的混淆状况(炎症性皮疹)。主要暴露检查是在指数访问前1年的平均糖化血红蛋白。二次暴露包括就诊前3个月、3 - 6个月、6-12个月以及就诊后3个月的糖化血红蛋白水平。使用分类Hgb A1c和糖尿病历史诊断进行敏感性分析。结果就诊前平均糖化血红蛋白每升高1点,患癣的几率增加1.16倍(比值比[OR] 1.16;置信区间[CI] 1.11-1.22)。与甲真菌病和头癣相比,给定hba1c的皮肤癣的发癣几率更高。在调整年龄和性别后,患癣的几率有所降低,但仍然显著(OR = 1.09;可信区间1.03 - -1.15)。结论:就诊前一年的平均糖化血红蛋白与足癣感染的几率存在关联。这种关联与个体A1c期相似,在甲癣和头癣以外的足癣感染中更为明显。这些数据可能支持对新发皮肤癣患者进行糖化血红蛋白筛查,或者相反,如果糖化血红蛋白升高,则可能增加对皮肤皮肤癣的怀疑。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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