Psychometrics of chronic liver disease questionnaire in Chinese chronic hepatitis B patients

Table 4 Factor analysis of the chronic liver disease questionnaire (n = 460)

Items	F 1 (EM)	F 2 (WO)	F 3 (AC + FA)	F 4 (AB + SY)	F 5 (FA)	F 6 (sleep)
Abdominal symptoms
1. Abdominal bloating				0.68
5. Abdominal pain				0.82
17. Abdominal discomfort				0.75
Fatigue
2. Tiredness or fatigue					0.52
4. Feel sleepy during the day					0.75
8. Decreased strength			0.66
11. Decreased energy			0.63
13. Drowsiness					0.72
Systemic symptoms
3. Bodily pain				0.68
6. Shortness of breath				(0.32)
21. Muscle cramps				(0.35)
23. Dry mouth				(0.32)
27. Itching				(0.28)
Activity
7. Not able to eat as much as you would like			0.76
9. Trouble in lifting or carrying heavy objects			0.64
14. Bothered by a limitation of the diet			0.65
Emotional function
10. Anxiety	0.73
12. Unhappiness	0.78
15. Irritability	0.77
16. Difficulty in sleeping at night						0.79
19. Mood swings	0.66
20. Difficulty in falling asleep at night						0.75
24. Depression	0.65
26. Problems with concentration	0.55
Worry
18. Worries about the impact of the liver disease		0.69
22. Worries that symptoms will develop into major problem		0.82
25. Worries that the condition is getting worse		0.81
28. Worries about never feeling any better		0.75
29. Availability of a liver for transplantation		0.51
Eigenvalue	36.14%	7.94%	5.44%	4.57%	4.01%	3.59%
Cumulative	36.14%	44.08%	49.52%	54.09%	58.10%	61.69%

Kaiser-Meyer-Olkin measure of sampling adequacy: 0.929. Bartlett’s test of sphericity: P < 0.001. The items with factor (F) loading coefficient less than 0.45 are written in bracket. EM: Emotional function; WO: Worry; AC: Activity; FA: Fatigue; AB: Abdominal symptoms; SY: Systemic symptoms.