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

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

 MethodsStatistic methodsResults
Reliability
 1. Internal consistencyCronbach’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. Stability2-week test-retest reliability aIntraclass correlation coefficient (ICC)r = 0.78, p < 0.001
95% CI: 0.63–0.88
Validity
 1. Face validityReview by target population bFrequency & percentage100% comprehensibility and interpretability
 2. Content validityReview by expert panelContent validity index (CVI)I-CVI = 0.80–1.00, S-CVI = 0.93
 3. Construct validity 1.Factor analysisExploratory factor analysis cKMO = 0.809
Bartlett’s Test of Sphericity: χ2 = 777.25, p < 0.001
Total variance explained = 65.84%
Item loadings = 0.69–0.85
Confirmatory factor analysis dχ2/d.f. = 2.26, CFI = 0.99, NFI = 0.99, IFI = 0.99, RMSEA = 0.049 (First-order one-factor CFA model)
  1. Remarks:
  2. CI Confidence interval
  3. I-CVI Item-level content validity index
  4. S-CVI Scale-level content validity index on average
  5. a The result was calculated based on 60 undergraduate students
  6. b The result was calculated based on 20 participants of general public (aged 18–72 years)
  7. c The result was calculated based on 300 randomly selected samples from among 820 samples
  8. d The result was calculated based on the remaining 520 samples not used to compute the EFA