Table 3. Factor loadings from the factor analysis of the GTS-QOL-French questionnaire.

	Factor 1	Factor 2	Factor 3	Factor 4	Factor 5	Factor 6
Variance explained (%)	41.2	8.8	5.9	5.4	4.6	4.1
‘Psychological’ subscale
16. Depressed mood	0.59	-0.07	0.28	-0.12	0.07	0.22
17. Mood switches	0.76	-0.12	-0.07	0.13	0.12	0.03
18. Lack of self-confidence	0.37	-0.06	0.34	0.21	-0.02	0.08
19. Anxiety	0.75	-0.08	-0.04	0.12	0.03	0.13
20. Restlessness	0.77	0.11	-0.18	0.10	0.13	-0.05
21. Temper dyscontrol	0.80	0.11	-0.11	0.15	0.04	-0.05
22. Lack of control over own life	0.67	0.02	0.14	-0.09	-0.11	0.24
23. Frustration	0.61	0.13	0.16	-0.10	0.17	0.08
24. Lack of social support	0.70	0.14	0.12	-0.10	0.02	-0.06
‘Echo-coprophenomena’ subscale
5. Involuntary swearing	0.07	0.86	-0.03	-0.05	-0.03	-0.13
6. Embarrassing gestures	0.04	0.67	0.05	0.21	0.04	-0.23
7. Repeating words	0.01	0.76	0.03	-0.01	-0.09	0.34
8. Copying people	-0.11	0.63	0.05	0.08	0.10	0.25
‘Social’ subscale
25. Difficulty seeing friends	-0.09	-0.10	0.72	0.09	0.12	0.10
26. Difficulty taking part in social activities	0.01	0.12	0.77	-0.10	0.11	-0.14
27. Loneliness/isolation	0.47	0.03	0.58	-0.07	-0.31	0.01
‘Cognitive’ subscale
11. Difficulty concentrating	0.24	-0.07	0.27	0.48	0.14	-0.02
12. Memory problems	-0.07	0.16	0.16	0.51	0.10	0.16
13. Losing important things	0.01	0.06	-0.21	0.78	-0.12	0.16
14. Difficulty finishing tasks	0.30	-0.03	0.21	0.58	-0.13	-0.05
‘Physical/Activities of daily living’ subscale
1. Movement dyscontrol	0.02	0.06	0.06	-0.13	0.70	-0.01
2. Difficulty in daily life activities	-0.02	0.11	0.32	0.13	0.51	-0.05
3. Pain or injuries	0.25	-0.10	-0.07	0.01	0.58	0.12
4. Phonic tics	0.09	0.44	-0.10	-0.08	0.42	0.11
‘Obsessive-compulsive’ subscale
9. Repeating actions	0.06	0.12	-0.09	0.24	0.00	0.48
10. Unpleasant thoughts	0.28	0.09	0.14	0.08	-0.01	0.40
15. Concerns about poor health	0.26	-0.15	0.00	0.02	0.13	0.51

Loadings equal or higher than 0.32 are presented in bold.