Factor analysis of the schizophrenia quality of life scale revision 4 (SQLS-R4) Chinese version and related factors

Po Ju Kuo, Hui Ing Ma, Chien Cheng Kuo, Wei Che Huang, Ming Shun Chung

Research output: Contribution to journalArticlepeer-review

10 Citations (Scopus)


Objectives. To validate the Schizophrenia Quality of Life Scale Revision 4 (SQLS-R4) Chinese version with factor analysis. We also investigated factors influencing quality of life results. Method. One hundred patients with schizophrenia participated in this study. Experienced psychiatrists evaluated each patient's current psychological condition to assure intact judgment. Participants then filled out the quality of life questionnaire, SQLS-R4. We used principal component analysis to analyze SQLS-R4 with oblique rotation. We also collected demographic data, another subjective and objective quality of life questionnaire, and information about the functional status of the participants at the same time. Multiple linear regression was used to analyze collected factors which may influence the quality of life of schizophrenic patients. Results. We extracted seven factors that explained a 68.1% variance in the patients' quality of life. The factors were relationships with others, loneliness, exhaustion, depressed thinking, somatic concerns, vitality, and worry. Conclusion. We found that the SQLS-R4 factor analysis provided insights into the structure of the quality of life of patients with schizophrenia. We also found that subjective social participation, subjective health, and depression were quality-of-life-related factors. Whether other factors influence the quality of life in patients with schizophrenia requires further investigation.

Original languageEnglish
Pages (from-to)278-284
Number of pages7
JournalInternational Journal of Psychiatry in Clinical Practice
Issue number4
Publication statusPublished - 2009 Nov 11

All Science Journal Classification (ASJC) codes

  • Psychiatry and Mental health

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