Table 3.

Item difficulties and factor loadings in an one-factor solution as well as in a rotated (Varimax) two-factor solution

			One-factor solution	Two-factor solutiona
	Items	M (SD)	1. Factor loading (43.43%)	1. Factor loading (43.43%)a, (27.25%)b	2. Factor loading (8.19%)a, (24.37%)b
1	Have you fainted?/Have you been passing out?	0.2 (0.58)	0.58	0.24	0.60
2	Have you felt dizzy and has your vision gone black?/Felt dizzy and couldn't see anymore, as though you were blind?	0.83 (1.06)	0.72	0.57	0.45
3	Have you felt as though you couldn't hear for a while, as though you were deaf? When people were talking to you, did they sound far away?	0.49 (0.96)	0.68	0.21	0.78
4	Have you had an experience of not being able to properly see things around you (e.g., blurred vision)	0.62 (1.0)	0.71	0.37	0.65
5	Have you felt as though your body or a part of your body has gone numb?	0.64 (1.08)	0.71	0.51	0.50
6	Have you felt as though you couldn't move for a while, as though you were paralyzed?	0.37 (0.81)	0.72	0.71	0.28
7	Have you felt as though your body, or a part of it was insensitive to pain (analgesia)?	0.46 (0.93)	0.64	0.33	0.58
8	Have you been in a state in which your body suddenly felt heavy and tired?	1.0 (1.32)	0.60	0.61	0.23
9	Have you experienced that your body becoming stiff for a while?	0.39 (0.85)	0.64	0.80	0.08
10	Have you felt nauseous? Have you felt as though you were about to throw up? Have you felt yourself break out in a cold sweat?	0.80 (1.10)	0.62	0.68	0.19
11	Have you had an “out-of-body” sensation? Have you felt as though you were outside of your body?	0.43 (0.90)	0.50	0.06	0.68
12	Have you had moments in which you have found yourself unable to speak?/Have you been able to speak only with great effort?/Have you had an experience in which you could only whisper for a period of time?	0.46 (0.91)	0.70	0.63	0.35
13	Have you felt suddenly weak and warm?	0.48 (0.95)	0.71	0.51	0.50

Note.

^aBefore rotation

^brotated (Varimax) factor matrix.