Psychometric validation of the S-QoL Chinese (Taiwan) version for patients with schizophrenia

Chia Yeh Chou, Mi-Chia Ma, Tsung Tsair Yang, Mei Jin Chen-Sea

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

We translated the S-QoL into the Chinese (Taiwan) language and evaluated the score distributions of the translated S-QoL in terms of ceiling/floor effect, internal consistency, test-retest reliability, and convergent and discriminant validity. To ensure conceptual and semantic equivalence of the S-QoL, the researchers performed both forward translation and back translation, consulted professionals, and completed a pilot trial on college students. Forty-one patients with schizophrenia were recruited. No significant ceiling/floor effects (<20%) were found in subscales of the translated S-QoL. The internal consistency reliabilities were acceptable to good for the whole scale and 7 of the subscales (Cronbach's alpha = 0.71-0.93), but not for the sentimental life subscale (Cronbach's alpha = 0.44). The test-retest reliabilities were moderate to high (ICC = 0.64-87, P < 0.001 to <0.0001). The convergent validities were supported by satisfactory correlations among subscales measuring related constructs of the translated S-QoL and those of the SQLS-R4, WHOQoL-BREF, and RESE (r = 0.36-0.82, P < 0.05 to <0.01). Discriminant validity was demonstrated between groups with different numbers of episodes and hospitalization. The S-QoL Chinese (Taiwan) version was found to have good psychometrics and is suggested as a feasible choice of disease-specific measure for capturing HRQoL in patients with schizophrenia.

Original languageEnglish
Pages (from-to)763-767
Number of pages5
JournalQuality of Life Research
Volume20
Issue number5
DOIs
Publication statusPublished - 2011 Jun 1

All Science Journal Classification (ASJC) codes

  • Public Health, Environmental and Occupational Health

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