Demographic and working data of the medical staff who treated patients with COVID-19 in January and February 2020 in Wuhan, China There were 220 medical staff who were initially asked to participate in the study, and 180 members of staff completed the study questionnaires, indicating a study participation rate of 81.82% at our medical center. The mean age of the medical staff was 32.31±4.88) years. The demographic and working data of the study participants are shown in Table 1.