Stress level of healthcare workers had a statistically significant correlation with occupational factors including the average number of working hours per day (OR = 1.96; 95% CI: 1.02 - 3.74, p<0.05), pressure from negative reaction of COVID-19 patients / their family (OR = 2.23, 95% CI: 1.17 - 4.28; p<0.05) and time pressure to complete work (OR= 5.88, 95% CI: 2.95 - 11.73, p<0.05).