A single-center comparative analysis of outpatients with and without COVID-19 in Sapporo, Japan.

This study aimed to investigate the demographic, clinical, and epidemiological statistics of Japanese patients attending a designated outpatient clinic for COVID-19 in Sapporo, Japan, and contrast the clinical and epidemiological features between those with and without mild COVID-19. A total of 27 (8.6%) of 315 patients were diagnosed with COVID-19. They had higher proportions of myalgia, direct contact with a confirmed COVID-19 patient, and attendance of social gatherings in close confines. We believe that our study makes a significant contribution to the literature because it provides a clinical picture of mild COVID-19 in the Japanese population, which has not been studied extensively. It can also assist in optimizing the local preventive measures to reduce the transmission of COVID-19.