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Computerized Adaptive Testing System of Functional Assessment of Stroke

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Development and preliminary validation of a Function IndeX for Trauma (FIX-IT).

Mohit Bhandari¹, Scott M Wasserman, Nicole Yurgin

¹The Division of Orthopaedic Surgery, Department of Surgery, and the Department of Clinical Epidemiology and Biostatistics, McMaster University, Hamilton, Ontario.

Canadian Journal of Surgery. Journal Canadien De Chirurgie

|September 27, 2013

Summary

The Function IndeX for Trauma (FIX-IT) score offers a reliable method for assessing lower extremity fracture healing. This new tool shows high agreement among clinicians and correlates well with patient-reported physical function.

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Area of Science:

Orthopedics
Trauma Surgery
Clinical Outcomes Assessment

Background:

Assessing fracture healing in clinical trials is often subjective.
The Function IndeX for Trauma (FIX-IT) score was developed for standardized assessment of weight-bearing and pain in lower extremity fractures.
Initial validation of the FIX-IT score was performed.

Purpose of the Study:

To evaluate the reliability and preliminary validity of the FIX-IT score.
To assess interrater agreement for the FIX-IT score.
To test convergent validity with the Short Form-36 version 2 (SF-36v2) questionnaire.

Main Methods:

A cross-sectional study included 50 patients with lower extremity fractures.
The FIX-IT score was assessed by multiple orthopedic surgeons, fellows, residents, and research coordinators.
Patients also completed the SF-36v2, and its scores were used for convergent validity testing.

Main Results:

Interrater reliability for the FIX-IT score was high, with intraclass correlation coefficients ranging from 0.637 to 0.915.
Overall interrater reliability for the total FIX-IT score was 0.879.
FIX-IT scores showed significant correlations with SF-36 physical component summary, physical function, and role-physical subscales.

Conclusions:

The FIX-IT score demonstrates high interrater agreement among various examiners.
FIX-IT scores correlate well with physical function measures from the SF-36.
The FIX-IT score shows potential as a reliable adjunctive measure for evaluating lower extremity fracture healing.