Variables	Items
Intolerance of Uncertainty	The uncertainty of the epidemic prevented me from having a firm opinion when I was on duty
	Pandemic uncertainty has made police work intolerable
	The uncertainty of the pandemic makes me feel uneasy, anxious or stressed
	Unforeseen events made me very frustrated with my duty
Emotional Exhaustion	I’m on duty and feeling emotionally drained
	It’s always late when work is over
	When I wake up every day, I feel a little tired
	It is also a kind of pressure for me to be on duty with other colleagues all day long
	I’m a little tired from my duty
	I’m feeling a little tired to do my police work
	I think my work is hard
	There will still be a lot of pressure to work with other colleagues
Secondary Trauma	I feel emotionally numb
	My heart starts pounding when I think about my contact with someone with COVID-19
	It seems like I’m reliving the trauma I’ve experienced dealing with COVID-19 patients
	I am frustrated with the future
	I have no interest in being with other people
	I feel nervous
	I’m not as active as usual
	I have trouble concentrating
	I avoid people, places or things that remind me of my relationship with COVID-19
	I want to avoid contact with some coronavirus patients
	I get angry easily
	I expect bad things to happen
Insomnia	Time to go to sleep after turning off the lights
	Wake up at night
	Waking up earlier than expected
	Total sleep duration
	Overall sleep quality
	How comfortable you feel all day
	Physical and mental state throughout the day
	How much you want to sleep during the day
COVID-19 Fear	I am most afraid of COVID-19
	It makes me uncomfortable to think about COVID-19
	My hands become clammy when I think about COVID-19
Resistance to Organizational Change	During the epidemic, the head of the agency prefers to do things in the traditional way
	The way the police are on duty has not changed much for a long time
	During the epidemic, agencies and organizations are less likely to adopt new ways of doing things
	Police agencies are less likely to adopt new duty practices