Table 1.

Factor loading of the Impact of Event Scale‐Revised items

Original factor and items [20]		Factor I Intrusion	Factor II Avoidance	Factor III Hyperarousal
Intrusion factor
1	Any reminder brought back feelings about it	0.883	−0.087	0.023
2	I had trouble staying asleep	0.143	−0.212	0.884
3	Other things kept making me think about it	0.946	−0.218	0.103
6	I thought about it when I did not mean to	0.492	0.414	−0.101
9	Pictures about it popped into my mind	0.494	0.370	−0.023
16	I had waves of strong feelings about it	0.278	0.251	0.379
20	I had dreams about it	0.341	0.238	0.182
Avoidance factor
5	I avoided letting myself get upset when I thought about it or was reminded of it	0.153	0.347	0.151
7	I felt as if it had not happened or was not real	0.113	0.598	−0.176
8	I stayed away from reminders about it	−0.004	0.781	−0.038
11	I tried not to think about it	−0.126	0.457	0.389
12	I was aware that I still had a lot of feelings about it, but I did not deal with them	−0.057	0.731	−0.055
13	My feelings about it were kind of numb	−0.070	0.508	0.212
17	I tried to remove it from my memory	−0.142	0.646	0.112
22	I tried not to talk about it	0.303	0.466	−0.032
Hyperarousal factor
4	I felt irritable and angry	0.060	0.113	0.512
10	I was jumpy and easily startled	0.150	0.201	0.444
14	I found myself acting or feeling like I was back at that time	0.502	0.334	0.024
15	I had trouble falling asleep	−0.026	−0.121	0.917
18	I had trouble concentrating	−0.122	0.208	0.608
19	Reminders of it caused me to have physical reactions, such as sweating, trouble breathing, nausea, or a pounding heart	0.195	0.086	0.457
21	I felt watchful and on guard	−0.045	0.570	0.127
		0.883	−0.087	0.023
% Of explained variance		20.1	18.4	19.6
Reliability (Cronbach's alpha)		0.90	0.85	0.88