Table 3. Loadings of Variables on Factors (in Bold) Emerging From Factor Analysis (Maximum-Likelihood Method, Promax Rotation).

Item no.	Abbreviated item-label	Factors					Communalities
		1	2	3	4	5
1	Exhaustion	0.745	−0.032	−0.028	0.022	0.049	0.560
2	Chronic fatigue	0.606	−0.047	0.125	0.004	0.004	0.385
3	Lethargy when working	0.684	0.071	−0.089	−0.060	0.055	0.487
4	Headache	0.457	0.065	0.050	0.001	0.127	0.232
5	Dizziness	0.391	0.104	0.105	0.057	0.140	0.198
6	Aching or tired eyes	0.548	0.022	−0.053	−0.013	0.081	0.310
7	Sore throat	0.022	−0.019	0.002	0.059	0.533	0.288
8	Muscle or joint stiffness	0.832	−0.065	−0.025	−0.026	−0.040	0.699
9	Ache in shoulder/neck/waist	0.843	−0.003	−0.089	−0.068	0.006	0.723
10	Heavy feeling in legs	0.563	0.030	0.176	−0.004	0.055	0.352
11	Breathlessness	−0.007	−0.038	0.650	−0.058	0.003	0.427
12	Chest congestion	0.052	0.137	0.694	0.225	−0.085	0.561
13	Heart palpitations	−0.009	−0.040	0.570	−0.058	0.006	0.330
14	Poor appetite	−0.026	−0.042	−0.042	0.647	0.003	0.423
15	Upset stomach	0.090	0.247	0.058	0.636	−0.086	0.484
16	Indigestion	−0.028	−0.041	−0.038	0.454	0.020	0.210
17	Cold intolerance	0.209	−0.066	−0.005	0.258	0.387	0.264
18	Difficulty falling asleep	−0.023	0.472	0.078	0.157	0.057	0.257
19	Waking up during the night	0.056	0.510	0.056	0.105	−0.044	0.279
20	Impaired short-term memory	0.021	0.860	−0.047	−0.139	−0.071	0.767
21	Inability to respond quickly	0.059	0.830	−0.020	−0.102	−0.069	0.708
22	Difficulty concentrating	−0.113	0.818	−0.012	0.010	0.057	0.685
23	Distracted for no reason	−0.014	0.575	0.046	0.093	0.143	0.362
24	Nervous or jittery	−0.071	0.611	0.019	0.141	0.172	0.428
25	Frequently catch colds	0.142	0.076	−0.045	−0.039	0.771	0.624