Hoarding symptoms among psychiatric outpatients: Confirmatory factor analysis and psychometric properties of the Saving Inventory - Revised (SI-R)

Siau Pheng Lee, Clarissa Ong, Vathsala Sagayadevan, Rebecca Ong, Edimansyah Abdin, Susan Lim, Janhavi Vaingankar, Louisa Picco, Swapna Verma, Siow Ann Chong, Mythily Subramaniam

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Abstract

Background: The growing interest in problematic hoarding as an independent clinical condition has led to the development of the Saving Inventory-Revised (SI-R) to assess hoarding phenomenology. The SI-R is one of the most widely used instruments to measure hoarding symptoms; however, it lacks validation in non-Western samples. Methods: The current study examined the construct, convergent, and discriminant validity of the SI-R among 500 outpatients at a psychiatric hospital in Singapore. The three-factor structure solution of the SI-R was fitted in a confirmatory factor analysis. Results: The final model achieved mediocre fit (χ2 = 1026.02, df = 186; RMSEA = 0.095, SRMR = 0.06; CFI = 0.86; NNFI = 0.85). Two reverse-coded items (items 2 and 4) were removed due to insufficient factor loadings, resulting in the modified 21-item SI-R (SIR-21). Our findings indicate the need to further examine the construct validity of the SI-R, particularly in non-Western samples. Nonetheless, correlations with other hoarding-related constructs, such as anxiety (Beck Anxiety Inventory) and depression (Beck Depression Inventory-II), supported the convergent and discriminant validity of the SIR-21 in our sample. Conclusions: Findings in our current majority Chinese sample were consistent with previous observations from other Chinese samples. Implications were discussed from a cross-cultural perspective, such as cultural emphasis on saving for future use and overlap between the concepts of discarding and acquiring in Chinese samples. Future studies should also examine differences among other ethnic groups (e.g., Malay, Indian).

Original languageEnglish
Article number364
Number of pages12
JournalBMC Psychiatry
Volume16
Issue number1
DOIs
Publication statusPublished - 26 Oct 2016
Externally publishedYes

Keywords

  • Asian
  • Clutter
  • Cultural influence in psychiatry
  • Difficulty discarding
  • Excessive acquisition
  • Psychometric properties
  • Singapore
  • Validity

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