Table 1.

Specific items of questionnaire.

Questionnaire item type	Explanations
General data statistics	The collected general data on the research objects included gender, age, marital status, education level, working years, and experience in responding to public emergencies.
PHQ-9	The survey scale consisted of 9 items, including pleasure loss, depression, sleep disorder, energy lack, eating disorder, low self-evaluation, difficulty in concentration, dysphoria, and negative ideas. Each item was scored between 0 and 3. 0 referred to no occurrence, 1 represented an occasional occurrence, 2 meant that more than half of the above symptoms occurred, and 3 indicated an everyday occurrence. The total score between 0 and 4 stood for no depression, that between 5 and 9 referred to mild depression, that between 10 and 14 was moderate depression, and that over 15 denoted severe depression.
GAD-7	The survey scale consisted of 7 items, including dysphoria, control concern, concern about this kind of thing, tension without relaxation, fidget, irritability, and the fear that something bad would happen. Each item was scored between 0 and 3.0 referred to no occurrence, 1 represented an occasional occurrence, 2 meant that more than half of the above symptoms occurred, and 3 indicated an everyday occurrence. The total score between 0 and 4 represented no depression, that between 5 and 9 meant mild depression, that between 10 and 14 referred to moderate depression, and that over 15 denoted severe depression.
ISI	The survey scale consisted of 7 items, including difficulty in falling asleep, difficulty in maintaining sleep, early weakening, dissatisfaction with sleep, impacts on daily activities, impacts on living quality, and worry/pain. The full score for each item was 4. 0 referred to no insomnia, 1 represented mild insomnia, 2 denoted moderate insomnia, 3 stood for severe insomnia, and 4 meant extremely severe insomnia. The total score between 0 and 7 represented no insomnia, that between 8 and 14 referred to mild insomnia, that between 15 and 21 denoted moderate insomnia, and that between 22 and 28 indicated severe insomnia.