Journal
JOURNAL OF HEAD TRAUMA REHABILITATION
Volume 18, Issue 3, Pages 252-258Publisher
LIPPINCOTT WILLIAMS & WILKINS
DOI: 10.1097/00001199-200305000-00003
Keywords
Glasgow Outcome Scale; bead injury; outcome assessment
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Objective: To determine test-retest reliability and interrater reliability for structured interviews for the Glasgow Outcome Scale (GOS) using in-person and telephone contact. Methods: Study 1: Thirty head-injured patients were interviewed face-to-face and then reinterviewed by telephone a few days later by the same rater. Study 2: Fifty-six head-injured patients were interviewed by telephone and then face-to-face interviews were carried out by a different person up to 1 month later. Agreement between ratings on the GOS and the extended GOS (GOSE) in each of the studies was assessed using the K statistic weighted with quadratic weights. Results: Values Of kappa(w) for the test-retest reliability study were .92 for both GOS and GOSE, and for interrater reliability study were .85 for the GOS and .84 for the GOSE. Conclusions: The findings indicate good test-retest and interrater reliability for the structured interviews. In most circumstances a structured interview over the telephone can provide a reliable assessment of the GOS, and can safely be substituted for in person contact.
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