Psychometric properties of the Chinese version of Spiritual Index of Well-Being in elderly Taiwanese

• Published in: BMC geriatrics 2017-01, Vol.17 (1), p.3-3, Article 3
• Main Authors: Wu, Li-Fen, Yang, Shu-Hui, Koo, Malcolm
• Format: Article
• Language: English
• Subjects: Aged; Aged, 80 and over; Analysis; Asian Continental Ancestry Group; Factor analysis; Factor Analysis, Statistical; Female; Geriatrics; Health Services for the Aged; Humans; Long-Term Care; Long-term care of the sick; Male; Medical research; Mental depression; Older people; Patients; Psychological aspects; Psychometrics; Psychometrics - methods; Quality of Life; Quantitative psychology; Reproducibility of Results; Spirituality; Systematic review; Taiwan; Translating and interpreting; Validity; Well being
• ISSN: 1471-2318; 1471-2318
• DOI: 10.1186/s12877-016-0392-1

Spiritual well-being has become an increasingly important issue for the elderly people. The 12-item Spirituality Index of Well-Being (SIWB) is a well-validated instrument for assessing a patient's current spiritual state. However, the psychometric properties of the SIWB in the Chinese elderly populations are not known. Therefore, this study translated the SIWB into Chinese and evaluated its psychometric properties. The English version of the SIWB was first translated into Chinese based on the Brislin's translation model. The psychometric properties of the translated version of the SIWB (SIWB-C) was evaluated in 416 elderly Taiwanese recruited using a purposive sampling procedure from a medical center, a long-term care institution, and a community health center. Convergent validity was accessed using Pearson's correlation coefficients of the SIWB-C, the EQ-5D-3 L health-related quality of life scale, and the Geriatric Depression Scale-5 (GDS-5). Exploratory factor analysis with Varimax rotation was performed to determine the construct validity. Confirmatory factor analysis was conducted for verification of the quality of the factor structures and demonstrating the convergent validity of the SIWB-C. An internal consistency test based on the Cronbach's alpha coefficient and a stability test based on the Guttman split-half coefficient were also performed. Test-retest reliability was evaluated with intraclass correlation coefficient. Exploratory factor analysis confirmed the original two-dimensional structure of the scale. Confirmatory factor analysis indicated a well-fitting model and a fine convergent validity of the SIWB-C. The Cronbach's alpha coefficient and the Guttman split-half coefficient for the SIWB-C were 0.94 and 0.84, respectively. The correlations between the SIWB-C with EQ-5D-3 L and GDS-5 were 0.22 (p