Quality of life after brain injury-overall scale, Japanese version: assessment of reliability and validity

ABSTRACT

This study analyzed the linguistic and psychometric validation of the Japanese version of the Quality of Life after Brain Injury-Overall Scale (QOLIBRI-OS) consisting of six items which cover several TBI-relevant domains. We hypothesized that the Japanese version has good reliability, convergent validity, and divergent validity, compared with its long version, the 37-item QOLIBRI. The QOLIBRI-OS Japanese version was forward and back-translated from the English version. In total, 129 individuals participated in this study after experiencing a traumatic brain injury and attending clinics, rehabilitation centers, and support centers in Japan. The structure of the QOLIBRI-OS was investigated by confirmatory factor analyses and compared with the QOLIBRI. Only one factor was extracted, and a model with one underlying factor had a good fit. The QOLIBRI-OS showed good-to-excellent internal consistency and test-retest reliability. The QOLIBRI-OS was positively correlated with the QOLIBRI, Short Form Health Survey-36 version 2, and Glasgow Outcome Scale Extended, and negatively correlated with the Hospital Anxiety and Depression Scale. The results suggest that the QOLIBRI-OS Japanese version is a reliable and valid tool for assessing disease-specific health-related QOL in individuals after traumatic brain injury in Japan.

KEYWORDS:

• Quality of life
• traumatic brain injury
• cognitive dysfunction
• validity
• Patient-Reported Outcome

Acknowledgments

The authors sincerely thank the rehabilitation staff from the following institutions for their assistance: Fujita Health University, Mie Prefecture Physically Handicapped General Welfare Center, Komono Kosei Hospital, Matsusaka Chuo General Hospital, Chubu Medical Center, Kizawa Memorial Hospital, Nagoya City General Rehabilitation Center, Yokohama City University Medical Center, Seirei Mikatahara General Hospital, Matsuyama Rehabilitation Hospital, International University of Health and Welfare Rehabilitation Center, Shimura Ohmiya Hospital, Hoshigaura Hospital, Asuka family support center, Koushi family support center, and Waraitaiko support center for people with cognitive dysfunction.

Disclosure statement

No potential conflict of interest was reported by the author(s).

Data availability statement

Due to the nature of this research, participants of this study did not agree for their data to be shared publicly; therefore, supporting data is not available.

Supplemental data

Supplemental data for this article can be accessed online at https://doi.org/10.1080/02699052.2024.2309652.

Additional information

Funding

This study was supported by a Grant-in-Aid for Scientific Research (C) provided by the Japan Society for the Promotion of Science (JSPS) (No. 24500663).