caa a22 4500 606180311 CHVBK 20210128100805.0 cr unu---uuuuu 210128e20150201xx s 000 0 eng 10.1007/s11136-014-0771-z doi (NATIONALLICENCE)springer-10.1007/s11136-014-0771-z Examining unidimensionality and improving reliability for the eight subscales of the SF-36 in opioid-dependent patients using Rasch analysis [Elektronische Daten] [Yu-Yu Hsiao, Ching-Lin Shih, Wan-Hui Yu, Cheng-Hsi Hsieh, Ching-Lin Hsieh] Purpose: The Medical Outcome Study Short Form 36 (SF-36) is one of the most commonly used questionnaires for monitoring the Health-Related Quality of Life (HRQOL) of opioid-dependent patients. However, the unidimensionality and reliability of the SF-36 have not been verified in opioid-dependent patients. The aim of this study was to examine the unidimensionality and to improve the test reliability of the SF-36 for use in opioid-dependent patients. Methods: A total of 583 opioid-dependent patients were recruited in the study. Unidimensionality was examined by conducting unidimensional Rasch analysis. Item fit statistics and principle component analysis were used to check the item-model fit in each of the eight subscales of the SF-36. Reliability was evaluated by applying both unidimensional and multidimensional Rasch analyses. Results: After three misfitting items were excluded, the remaining items of each subscale in the SF-36 represented a single construct. The test reliabilities (0.80-0.87) yielded by the multidimensional approach were much higher than those (0.68-0.82) produced by the unidimensional approach. Conclusion: The remaining 32 items of the SF-36 are appropriate for evaluating the HRQOL in opioid-dependent patients in terms of unidimensionality. Additionally, the test scores produced by the multidimensional approach were more accurate than those obtained by the unidimensional approach. Springer International Publishing Switzerland, 2014 Opioid dependence nationallicence Health-Related Quality of Life (HRQOL) nationallicence Unidimensionality nationallicence Multidimensional Rasch model nationallicence Test reliability nationallicence Hsiao Yu-Yu Department of Educational Psychology, Texas A&M University, 4225 TAMU, 77843-4225, College Station, TX, USA aut Shih Ching-Lin Center for Teacher Education and Institute of Education, National Sun Yat-Sen University, No. 70, Lien-Hai Road, 80424, Kaohsiung, Taiwan aut Yu Wan-Hui School of Occupational Therapy, College of Medicine, National Taiwan University, 4th Floor, No. 17, Xu-Zhou Road, 10055, Taipei, Taiwan aut Hsieh Cheng-Hsi Department of Psychiatry, Taipei Veterans General Hospital, Taoyuan Branch, No. 100, Section3, Cheng-Kung Road, 33052, Taoyuan, Taiwan aut Hsieh Ching-Lin School of Occupational Therapy, College of Medicine, National Taiwan University, 4th Floor, No. 17, Xu-Zhou Road, 10055, Taipei, Taiwan aut Quality of Life Research Springer International Publishing 24/2(2015-02-01), 279-285 0962-9343 24:2<279 2015 24 11136 https://doi.org/10.1007/s11136-014-0771-z text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s11136-014-0771-z text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Hsiao Yu-Yu Department of Educational Psychology, Texas A&M University, 4225 TAMU, 77843-4225, College Station, TX, USA aut NATIONALLICENCE 700 1- Shih Ching-Lin Center for Teacher Education and Institute of Education, National Sun Yat-Sen University, No. 70, Lien-Hai Road, 80424, Kaohsiung, Taiwan aut NATIONALLICENCE 700 1- Yu Wan-Hui School of Occupational Therapy, College of Medicine, National Taiwan University, 4th Floor, No. 17, Xu-Zhou Road, 10055, Taipei, Taiwan aut NATIONALLICENCE 700 1- Hsieh Cheng-Hsi Department of Psychiatry, Taipei Veterans General Hospital, Taoyuan Branch, No. 100, Section3, Cheng-Kung Road, 33052, Taoyuan, Taiwan aut NATIONALLICENCE 700 1- Hsieh Ching-Lin School of Occupational Therapy, College of Medicine, National Taiwan University, 4th Floor, No. 17, Xu-Zhou Road, 10055, Taipei, Taiwan aut NATIONALLICENCE 773 0- Quality of Life Research Springer International Publishing 24/2(2015-02-01), 279-285 0962-9343 24:2<279 2015 24 11136