| A4 I think it is important for ED nurses to master the relevant operational skills of tackling EID. | 0.922 | 0.153 | 0.079 | 0.010 | -0.023 | -0.025 | 0.042 |
| A6 I think it is very important for ED nurses to carry out emergency drills on the prevention and control of EID. | 0.907 | 0.235 | 0.095 | 0.051 | 0.063 | -0.037 | -0.008 |
| A5 I think it is important to carry out training for ED nurses on EID. | 0.883 | 0.208 | 0.144 | 0.004 | 0.021 | -0.012 | 0.027 |
| A3 I think it is important for ED nurses to have knowledge about EID. | 0.875 | 0.196 | 0.096 | 0.017 | 0.061 | -0.110 | 0.057 |
| A7 I think it is important for the ED triage nurses to investigate the epidemiological history of the patients. | 0.866 | 0.157 | 0.088 | 0.056 | -0.031 | 0.069 | 0.016 |
| A8 I think it is important for ED triage nurses to investigate the epidemiological history of patients’ families. | 0.866 | 0.152 | 0.087 | 0.044 | -0.085 | 0.051 | -0.011 |
| A11 I think it is very important that ED nurses can correctly transport the patients with suspected or diagnosed EID according to the norms. | 0.844 | 0.219 | 0.083 | 0.019 | 0.014 | 0.056 | -0.019 |
| A10 I think it is very important for ED to correctly implement the latest treatment plan during the EID outbreak. | 0.835 | 0.189 | 0.081 | 0.046 | -0.009 | 0.073 | -0.008 |
| A13 I think it is very important for the ED nurses to actively pay attention to the various examination indicators in their daily work. | 0.791 | 0.195 | 0.124 | 0.009 | 0.023 | -0.005 | -0.051 |
| A2 I think the ED nurses play a very important role in the prevention and control of EID. | 0.789 | 0.183 | 0.048 | 0.004 | 0.015 | -0.143 | 0.001 |
| B15 I will strictly follow the transport process to transport the patients with EID. | 0.209 | 0.878 | 0.047 | 0.109 | 0.063 | 0.051 | 0.052 |
| B14 After patients with suspected or confirmed EID are discharged，transferred or died，I will strictly implement the Technical Specification for Disinfection of Medical Institutions and do a good job of final disinfection. | 0.136 | 0.866 | 0.052 | 0.056 | 0.054 | -0.005 | 0.083 |
| B13 During the outbreak of EID，I will clean and disinfect the environment of the ED according to the latest diagnosis and treatment norms. | 0.210 | 0.858 | 0.091 | 0.106 | 0.082 | 0.021 | 0.062 |
| B12 In clinical work，I will actively wash my hands and/or disinfect my hands between contact with different patients. | 0.210 | 0.848 | 0.089 | 0.098 | 0.120 | 0.008 | 0.076 |
| B11 I will routinely wear gloves when I am possible contact with the patient's body fluids，blood，secretions，excrement，vomit，and pollutants. | 0.233 | 0.789 | 0.084 | 0.125 | 0.109 | -0.032 | 0.074 |
| B16 I will obey the head nurse's shift and actively participate in the care of patients with EID. | 0.238 | 0.762 | 0.149 | 0.074 | 0.050 | -0.047 | -0.059 |
| B7 For different treatment scenarios，I will correctly choose to use personal protective equipment correctly. | 0.232 | 0.742 | 0.222 | 0.030 | 0.068 | -0.019 | -0.052 |
| B9 During the use of medical surgical masks or medical protective masks，I will replace them with no moisture or pollution every 4 hours in strict accordance with the regulations. | 0.162 | 0.667 | 0.105 | 0.054 | 0.123 | 0.046 | 0.032 |
| B17 During regulary work，I will pay attention to the relevant examination indicators of patients about EID. | 0.185 | 0.660 | 0.267 | -0.095 | -0.047 | 0.099 | -0.067 |
| B2 I will consciously participate in the relevant training in dealing with EID. | 0.223 | 0.280 | 0.860 | 0.044 | 0.027 | -0.014 | 0.023 |
| B1 I will take the initiative to learn about EID. | 0.189 | 0.288 | 0.844 | 0.046 | 0.005 | -0.007 | 0.028 |
| B3 I will take the initiative to participate in the emergency drill for the prevention and control of EID. | 0.229 | 0.236 | 0.835 | 0.061 | -0.039 | 0.038 | -0.065 |
| K27 Which of the following statement about the transfer of COVID-19（Corona Virus Disease 2019）is correct？ | 0.104 | 0.030 | 0.119 | 0.646 | -0.010 | 0.138 | 0.179 |
| K24 According to the Law of the People's Republic of China on the Prevention and Treatment of Infectious Diseases，which type of infectious diseases does COVID-19 belong to. | 0.032 | 0.014 | -0.003 | 0.586 | -0.042 | 0.355 | 0.309 |
| K25 When the ED medical staff found a suspected or confirmed COVID-19，how long time should they reported directly online within？ | -0.039 | 0.174 | 0.045 | 0.535 | 0.191 | -0.007 | 0.037 |
| K1 Which of the following is more accurate about the definition of EID？ | 0.034 | 0.145 | -0.053 | 0.500 | 0.266 | -0.162 | -0.394 |
| K3 Which of the following epidemiological description of the dengue virus is correct？ | -0.002 | 0.045 | 0.044 | -0.076 | 0.716 | 0.304 | 0.060 |
| K23 If the ED nurses found EID patients or suspected of EID patients，where should to report in time？ | -0.027 | 0.177 | -0.017 | 0.091 | 0.713 | -0.103 | -0.053 |
| K26 Where should the ED nurse transport when found patients with clear or suspected EID？ | 0.009 | 0.111 | -0.017 | 0.219 | 0.493 | -0.079 | 0.047 |
| K11 The procedure for wearing and taking off protective equipment for ED nurses when entering or leaving the location of patients with suspected or confirmed airborne diseases is？ | 0.010 | -0.015 | 0.093 | 0.220 | -0.002 | 0.732 | -0.097 |
| K12 According to the Code for Infection Management in Door and Emergency Hospitals in Medical Institutions，which choice of ED nurses for personal protective equipment when exposed to diseases infected by different transmission routes is correct？ | -0.169 | -0.010 | -0.009 | -0.149 | -0.041 | 0.622 | 0.304 |
| K6 Which of the following is correct about the epidemiological characteristics of COVID-19（Corona Virus Disease 2019）？ | 0.092 | 0.154 | -0.119 | 0.289 | 0.115 | 0.401 | -0.031 |
| K16 Emergency environment is divided by the degree of pollution. Which of the following are the moderate environmental pollution risk areas？ | -0.023 | 0.104 | 0.022 | 0.192 | -0.100 | -0.008 | 0.710 |
| K7 Which of the following statement is true about the clinical manifestations of COVID-19？ | 0.086 | 0.072 | -0.069 | 0.114 | 0.364 | 0.076 | 0.673 |
| Eigenvalue | 11.225 | 4.069 | 2.169 | 1.873 | 1.417 | 1.088 | 1.022 |
| Variance explained（%） | 23.381 | 18.613 | 7.275 | 4.856 | 4.751 | 4.238 | 4.128 |
| Cumulative sums of squares（%） | 23.381 | 41.994 | 49.269 | 54.125 | 58.876 | 63.114 | 67.242 |
