A cross-sectional study of workplace measures against COVID-19 and psychological distress among Japanese workers

ObjectivesThis study examined the relationship between the status of infection control efforts against COVID-19 in the workplace and workers mental health using a large-scale Internet study. MethodsThis cross-sectional study was based on an Internet monitoring survey conducted during the third wave of the COVID-19 epidemic in Japan. Of the 33,302 people who participated in the survey, 27,036 were included in the analyses. Participants answered whether or not each of 10 different infection control measures were in place at their workplace (e.g. wearing masks at all times during working hours). A Kessler 6 (K6) score of [≥]5 was defined as mild psychological distress. The odds ratios (ORs) of psychological distress associated with infection control measures at the workplace were estimated using a multilevel logistic model nested in the prefectures of residence. ResultsThe OR of subjects working at facilities with 4 or 5 infection control measures was 1.15 (95% confidence interval [CI]: 1.02-1.29, p=0.025), that in facilities with 2 or 3 infection control measures was 1.32 (95% CI: 1.15-1.50, p<0.001), and that in facilities with 1 or no infection control measures was 1.48 (95% CI: 1.30-1.68, p<0.001) compared to subjects whose workplaces had [≥]6 infection control measures. ConclusionOur findings suggest that proactive COVID-19 infection control measures can influence the mental health of workers.