. 2023 Mar 31;14:1130497. doi: 10.3389/fpsyg.2023.1130497

Table 2.

The result of item analysis (N = 356).

Item	CR ≥ 3	Correlation between item and total score	Cronbach ‘α after item deletion	Factor analysis		The number of criteria not met	Items retained
Item	CR ≥ 3	Correlation between item and total score	Cronbach ‘α after item deletion	Commonality	Factor loading	The number of criteria not met	Items retained
1. I do not want to take the initiative to do things	8.296**	0.464**	0.926	0.205	0.453	0	Selected
2. I do not want to go out	7.986**	0.463**	0.926	0.212	0.460	0	Selected
3. I do not want to communicate with people	6.598**	0.397**	0.926	0.252	0.502	1	Selected
4. I lost interest in things that I used to be interested in	8.825**	0.511**	0.925	0.292	0.540	0	Selected
5. I feel down	9.317**	0.545**	0.925	0.374	0.611	0	Selected
6. I feel hopeless	7.963**	0.539**	0.924	0.537	0.732	0	Selected
7. I feel anxious	8.593**	0.561**	0.924	0.442	0.665	0	Selected
8. I worry about the future	9.114**	0.574**	0.924	0.398	0.631	0	Selected
9. I can hardly be happy	8.256**	0.521**	0.925	0.307	0.554	0	Selected
10. My memory has deteriorated	5.462**	0.326**	0.929	0.064	0.253	4	Deleted
11. My ability to think about problems has declined	5.879**	0.388**	0.926	0.213	0.462	1	Selected
12. My mind has become dull	4.998**	0.313**	0.927	0.134	0.366	3	Deleted
13. I have fewer social activities	9.969**	0.564**	0.925	0.333	0.577	0	Selected
14. I cry or want to cry	6.490**	0.450**	0.925	0.387	0.622	0	Selected
15. I think a lot	9.411**	0.584**	0.924	0.406	0.637	0	Selected
16. I feel tired	6.969**	0.441**	0.928	0.121	0.349	3	Deleted
17. I find it difficult to manage everyday life	8.876**	0.550**	0.924	0.460	0.679	0	Selected
18. I am not satisfied with my current physical condition	10.590**	0.644**	0.923	0.483	0.695	0	Selected
19. I woke up in the middle of the night	6.976**	0.397**	0.928	0.085	0.291	4	Deleted
20, I do not fall asleep easily	5.857**	0.337**	0.927	0.151	0.388	3	Deleted
21. I have trouble falling asleep after waking up in the middle of the night	7.172**	0.415**	0.926	0.163	0.403	2	Deleted
22. I get less sleep	6.179**	0.343**	0.926	0.153	0.391	3	Deleted
23. I dream a lot while I sleep	4.782**	0.277**	0.928	0.074	0.272	4	Deleted
24. I think the recovery effect is much lower than I expected	8.820**	0.577**	0.924	0.464	0.681	0	Selected
25. I do not think friends and family fully understand me	5.536**	0.377**	0.926	0.298	0.546	1	Selected
26. I do not feel like my body is getting better	11.289**	0.710**	0.922	0.649	0.806	0	Selected
27. I feel powerless about a lot of things	11.471**	0.746**	0.922	0.604	0.777	0	Selected
28. I feel isolated	6.418**	0.445**	0.925	0.420	0.648	0	Selected
29. I do not think I can change my current status	10.988**	0.695**	0.922	0.571	0.756		Selected
30. I think I’m so useless	10.302**	0.635**	0.923	0.508	0.713	0	Selected
31. I consider myself a burden on the family	9.537**	0.558**	0.924	0.400	0.632	0	Selected
32. I feel guilty for dragging down my family	9.206**	0.555**	0.924	0.411	0.641	0	Selected
33. I do not want to live	5.696**	0.427**	0.926	0.415	0.644	0	Selected

**p < 0.001; *p < 0.05.