The performance of a limited set of items from the Functional Independence Measure for use in acute trauma care and rehabilitation.

Abstract

To evaluate the performance of a limited set of three items from the Functional Independence Measure--eating, walking, and expression--(henceforth referred to as the Set) for use in acute trauma care and rehabilitation. Retrospective comparison of the Set-scores (3-item total) to the Functional Independence Measure (FIM) scores in 83 consecutive patients with a primary diagnosis related to trauma (90% of those eligible) over a 2-year period, on an acute rehabilitation unit in a tertiary care university hospital. The age distributions of gender and diagnostic categories were examined. The sensitivity and specificity of the Set-score in detecting changes in the FIM were evaluated across a range of cut-off values. Correlation between FIM scores and Set-scores at admission, at discharge, and for interval change were assessed using the intraclass correlation coefficient. Sources of the Set's weaknesses were explored. Age distribution reflects the predisposition of older women to hip fractures and males to the other trauma. No degree of change in the Set-score provided a combination of sensitivity and specificity satisfactory for detecting potentially important changes in the FIM. Intraclass Correlation Coefficients (ICC) for Set-scores and FIM scores on admission and discharge were both .12. The ICC for the interval change data was .11. (95% confidence limits:--.11 to .34). This Set is not a useful measure of functional disability in a heterogeneous population of trauma patients.