1 Statistical analysis Hypothesis As mentioned earlier, this study is aimed to investigate the psychological impact of the COVID- 19 pandemic on the healthcare workers in Riyadh, Saudi Arabia. Based on an extensive review of the literature, the following hypothesis is developed and would be investigated throughout the research project. Ho:There is no significant relationship between the COVID-19 pandemic and psychological impact on healthcare workers in Riyadh, Saudi Arabia. H1:There is a significant relationship between the COVID-19 pandemic and psychological impact on healthcare workers in Riyadh, Saudi Arabia. DASS-21: 2 Statistical analysis of the data Data were fed to the computer and analyzed using IBM SPSS software package (Armonk, NY: IBM Corp). Qualitative data were described using number and percent. The Kolmogorov-Smirnov test was used to verify the normality of distribution. Quantitative data were described using mean, standard deviation. Significance of the obtained results was judged at the 5% level. The used tests were 1 - Chi-square test For categorical variables, to compare between different groups 2 - Monte Carlo correction Correction for chi-square when more than 20% of the cells have expected count less than 5 3 Table (1): Distribution of the studied cases according to demographic characterizes of participants (n = 379) Demographic characterizes of participants No. % Gender Male 217 57.3 Female 162 42.7 Marital Status Single 191 50.4 Married 179 47.2 Divorce 9 2.4 Occupational Physician (Consultant) 66 17.4 Physician (Specialist) 53 14.0 Physician (Resident) 55 14.5 Physician (Internship) 26 6.9 Nurse (Specialist) 52 13.7 Nurse (technician) 21 5.5 Supportive staff 106 28.0 Sector of the healthcare system of your hospital MOH (Ministry of Health) 169 44.6 Government sector 161 42.5 Private sector 49 12.9 4 Table (2): Distribution of the studied cases according to DASS-21 severity categories of participants (n = 379) Q DASS-21 severity categories of participants Did not apply to me at all Applied to me to some degree, or some of the time Applied to me to a considerable degree or a good part of time Applied to me very much or most of the time No. % No. % No. % No. % Stress 1 Found it hard to wind down 106.0 28.0 149.0 39.3 88.0 23.2 36.0 9.5 6 I tended to over-react to situations 156.0 41.2 120.0 31.7 78.0 20.6 25.0 6.6 8 I felt that I was using a lot of nervous energy 130.0 34.3 130.0 34.3 78.0 20.6 41.0 10.8 11 I found myself getting agitated 156.0 41.2 116.0 30.6 79.0 20.8 28.0 7.4 12 I found it difficult to relax 107.0 28.2 147.0 38.8 80.0 21.1 45.0 11.9 14 I was intolerant of anything that kept me from getting on with what I was doing 163.0 43.0 129.0 34.0 63.0 16.6 24.0 6.3 18 I felt that I was rather touchy 198.0 52.2 107.0 28.2 52.0 13.7 22.0 5.8 ...