Adaptation and psychometric testing of the hoarding rating scale (HRS): a self-administered screening scale for epidemiological study in Chinese population

Table 2 Summary of the psychometric properties of the Chinese version of the Hoarding Rating Scale-Interview (CHRS)

	Methods	Statistic methods	Results
Reliability
1. Internal consistency	Cronbach’s method Corrected item-total correlation	Cronbach’s alpha statistic Pearson moment-product correlation coefficient	Alpha of scale = 0.86 Corrected item-total correlation = 0.60–0.74
2. Stability	2-week test-retest reliability ^a	Intraclass correlation coefficient (ICC)	r = 0.78, p < 0.001 95% CI: 0.63–0.88
Validity
1. Face validity	Review by target population ^b	Frequency & percentage	100% comprehensibility and interpretability
2. Content validity	Review by expert panel	Content validity index (CVI)	I-CVI = 0.80–1.00, S-CVI = 0.93
3. Construct validity 1.	Factor analysis	Exploratory factor analysis ^c	KMO = 0.809 Bartlett’s Test of Sphericity: χ² = 777.25, p < 0.001 Total variance explained = 65.84% Item loadings = 0.69–0.85
3. Construct validity 1.	Factor analysis	Confirmatory factor analysis ^d	χ²/d.f. = 2.26, CFI = 0.99, NFI = 0.99, IFI = 0.99, RMSEA = 0.049 (First-order one-factor CFA model)

Remarks:
CI Confidence interval
I-CVI Item-level content validity index
S-CVI Scale-level content validity index on average
^a The result was calculated based on 60 undergraduate students
^b The result was calculated based on 20 participants of general public (aged 18–72 years)
^c The result was calculated based on 300 randomly selected samples from among 820 samples
^d The result was calculated based on the remaining 520 samples not used to compute the EFA

ISSN: 1471-244X