Examining fatigue in COPD: development, validity and reliability of a modified version of FACIT-F scale

Table 2 Pattern and Structure Matrix for PCA with Oblimin Rotation of three factors solution of the 9-item FACIT scale (loading values ≤ 0.3 were not demonstrated)

Items	Components
	Component 1		Component 2		Component 3
	Pattern	Structure	Pattern	Structure	Pattern	Structure
1 I feel weak all over	0.94	0.89		0.30		0.56
2 I feel fatigued	0.83	0.86		0.30		0.60
3 I feel listless	0.77	0.84		0.35		0.61
4 I have trouble starting things	0.53	0.82		0.37	0.43	0.79
5 I have trouble finishing things	0.44	0.77		0.33	0.50	0.79
6 I have energy		0.43	0.91	0.88		0.36
7 I am able to do my usual activities		0.27	0.85	0.9		0.36
8 I am frustrated by being too tired		0.62		0.38	0.90	0.91
9 I have to limit my social activity		0.61		0.40	0.90	0.91

ISSN: 1477-7525