TY  - JOUR
PY  - 2015//
TI  - A Rasch analysis of the QOLIBRI Six-Item Overall Scale
JO  - Assessment
A1  - Muehlan, Holger
A1  - Wilson, Lindsay
A1  - Steinbüchel, Nicole von
SP  - 124
EP  - 130
VL  - 23
IS  - 1
N2  - OBJECTIVE: The Quality Of Life after BRain Injury (QOLIBRI) consortium has developed a short six-item scale (QOLIBRI-OS) to screen health-related quality of life after traumatic brain injury. The goal of the current study is to examine further psychometric qualities of the Quality Of Life after BRain Injury-Overall Scale (QOLIBRI-OS) at the item level using Rasch analysis with particular emphasis on the operating characteristics of the items. <br><br>METHOD: A total of 921 participants with traumatic brain injury were recruited. The analysis sample was restricted to 795 participants with Glasgow Coma Score and Glasgow Outcome Score-Extended available in order to ensure a well-characterized sample. <br><br>RESULTS: Overall fit statistics indicate sufficient reliability of the QOLIBRI-OS. The assumption of unidimensionality could be confirmed with reservation. The range of item locations is small, whereas item thresholds cover a wide range of the latent trait. The majority of parameter estimations for all class intervals of the respective test are in accordance with the model assumptions. <br><br>CONCLUSION: The results show that, despite marginal misfits to the model, the six items representing the QOLIBRI-OS could establish a Rasch scale.<p /> <p>Language: en</p>
LA  - en
SN  - 1073-1911
UR  - http://dx.doi.org/10.1177/1073191115569844
ID  - ref1
ER  -