Trends in Dermatological Diagnoses During Covid-19 Pandemic in Nigeria: A Retrospective Study.

Introduction: Coronavirus disease (COVID-19) quickly became a pandemic causing a global concern affecting public health directly and indirectly. Dermatology outpatient services were not an exception to the impact of COVID-19, especially in Sub-Saharan Africa. To the best of our knowledge, no similar study has been done in this region, and identifying patterns of dermatological diseases would help prepare adequately for future crises.

Objective: This study examined the changes in diagnostic patterns at the dermatology clinic before the COVID-19 pandemic and during the pandemic.

Methods: This retrospective study was conducted on dermatology outpatients seen at Nnamdi Azikiwe University Teaching Hospital, Nnewi, Nigeria. Diagnoses were compared during the pandemic (March to August 2020) with the corresponding period of the previous year.

Results: A total of 534 patients with 559 diagnoses were included. The average weekly dermatology clinic visits remained unchanged during the pandemic, although there was a 25.8% reduction in dermatology outpatients. The most common reasons for visiting the outpatient clinic during the COVID-19 pandemic were acne vulgaris, scabies, atopic dermatitis, dermatophytosis, and pityriasis versicolor. While the percentage of scabies significantly decreased during the pandemic; the percentage of allergic contact dermatitis, prurigo nodularis, candidiasis, hemangioma, and lupus erythematosus increased respectively.

Conclusion: Although the COVID-19 pandemic had a negligible impact on the average weekly number of skin clinic visits, it caused a change in diagnostic patterns. Understanding the pattern of skin diagnoses may help hospitals better prepare for future pandemics.