Psychometrics of the chronic liver disease questionnaire for Southern Chinese patients with chronic hepatitis B virus infection

Table 3 Item descriptive statistics and item-subscale correlations of the Chinese (HK) CLDQ

Items	Mean	(SD)	Item-subscale correlations1						Success2 (%)
			AS	FA	SS	AC	EF	WO
AS
1: Abdominal bloating	5.7	(1.6)	0.571	0.48	0.45	0.44	0.52	0.49	100
5: Abdominal pain	6.1	(1.4)	0.631	0.45	0.47	0.37	0.49	0.39	100
17: Abdominal discomfort	6.0	(1.5)	0.731	0.49	0.52	0.50	0.52	0.50	100
									(100)
FA
2: Tiredness or fatigue	4.3	(1.6)	0.52	0.791	0.68	0.57	0.61	0.48	100
4: Feel sleepy during the day	4.4	(1.6)	0.35	0.701	0.55	0.45	0.49	0.36	100
8: Decreased strength	5.6	(1.7)	0.53	0.721	0.59	0.70	0.63	0.53	100
11: Decreased energy	5.0	(1.6)	0.40	0.771	0.59	0.61	0.66	0.47	100
13: Drowsiness	5.1	(1.7)	0.40	0.661	0.56	0.46	0.58	0.47	100
									(100)
SS
3: Bodily pain	5.5	(1.7)	0.513	0.533	0.441	0.443	0.603	0.40	20
6: Shortness of breath	6.0	(1.5)	0.51	0.603	0.571	0.54	0.55	0.50	80
21: Muscle cramps	5.9	(1.4)	0.29	0.47	0.521	0.38	0.37	0.28	100
23: Dry mouth	4.7	(1.8)	0.37	0.473	0.471	0.41	0.513	0.543	40
27: Itching	5.4	(1.7)	0.30	0.493	0.491	0.41	0.42	0.41	80
									(64)
AC
7: Not able to eat as much as you would like	5.6	(1.9)	0.42	0.593	0.46	0.561	0.48	0.47	80
9: Trouble in lifting or carrying heavy objects	5.8	(1.7)	0.40	0.513	0.553	0.421	0.523	0.40	40
14: Bothered by a limitation of the diet	6.0	(1.6)	0.37	0.47	0.44	0.651	0.50	0.50	100
									(73)
EF
10: Anxiety	5.1	(1.8)	0.54	0.57	0.53	0.46	0.741	0.61	100
12: Unhappiness	5.2	(1.6)	0.43	0.58	0.52	0.44	0.721	0.52	100
15: Irritability	5.4	(1.5)	0.47	0.54	0.52	0.44	0.731	0.56	100
16: Difficulty in sleeping at night	5.1	(1.7)	0.45	0.46	0.46	0.45	0.591	0.48	100
19: Mood swings	5.5	(1.5)	0.46	0.60	0.57	0.50	0.791	0.54	100
20: Difficulty in falling asleep at night	4.5	(2.0	0.36	0.49	0.50	0.45	0.521	0.41	100
24: Depression	5.5	(1.4)	0.42	0.56	0.52	0.41	0.761	0.60	100
26: Problems with concentration	5.4	(1.6)	0.44	0.69	0.61	0.61	0.691	0.61	100
									(100)
WO
18: Worries about the impact of the liver disease	5.5	(1.8)	0.56	0.49	0.44	0.50	0.64	0.641	100
22: Worries that symptoms will develop into major problem	5.1	(1.8)	0.43	0.42	0.45	0.37	0.52	0.791	100
25: Worries that the condition is getting worse	5.2	(1.8)	0.44	0.49	0.54	0.49	0.59	0.851	100
28: Worries about never feeling any better	5.6	(1.7)	0.44	0.54	0.57	0.59	0.67	0.831	100
29: Availability of a liver for transplant	5.7	(2.0)	0.36	0.45	0.47	0.55	0.48	0.621	100
									(100)

¹Spearman correlation between item and its hypothesized subscale corrected for overlap (relevant item removed from its subscale for correlation);

²Level of scaling success, item-subscale correlation is higher for hypothesized subscale than competing subscale;

³Item-subscale correlation is lower for hypothesized subscale than for competing subscale, but not statistically significant at the cutoff point of two standard errors (0.16).