Table 6.

Factorial structure using alternative models to the proposed factorial structure.

	1 Factor Model	2 Factors Model		3 Factors Model
	1	1	2	1	2	3
5. The pain stops me from adequately performing my work activity	0.63	0.68		0.71
10. The pain stops me from adequately performing my household chores	0.65	0.66		0.63
24. The pain has decreased or halted my recreational and societal activities	0.37**	0.42		0.46
15. The pain stops me from performing physical and sport activities	0.51	0.52		0.49
2. I can perform a therapeutic exercise programme to reduce the pain	0.33**	0.21**			0.71
22. I can perform work activities that are physical demanding	0.38**	0.27**			0.67
17. I can perform a physical exercise programme despite fatigue symptoms appearing	0.26**	0.14**			0.67
12. I can perform daily life activities that are physical demanding	0.18**		0.58		0.58
6. Certain movements worsen my problem, and I avoid making them	0.57	0.58				0.922
20. I avoid performing certain movements that can injure me	0.55	0.55				0.49
1. The pain increases if I perform more movements during the day	0.47	0.45				0.45
23. I have little strength or muscle resistance	0.71	0.72				0.33**
25. I have difficulty performing movements that require a lot of precision such as grasping, manipulating, or cutting objects.	0.55	0.55		0.56
19. I have difficulty performing daily life activities such as walking fast or climbing stairs	0.62	0.60		0.61
14. My muscles are tense (rigid) and lack flexibility	0.48	0.47		0.43		–
11. My daily life activities tire me out	0.41	0.40		0.40

**Items recommended for removal due to factor loadings below 0.40.