Researchers tested the Spine Functional Index as a whole-spine patient-reported outcome measure and reported findings in The Spine Journal.
The observational cohort study was performed within 10 physical therapy outpatient clinics. The pilot study included 52 people and the main study included 203 people with average symptom duration of less than five weeks.
The researchers found that SFI had a high criterion validity with the Functional Ratings Index, equivalent internal consistency and a single-factor structure, according to the study. The clinical performance of the SFI on the Measurement of Outcome Measures and Bot scale was higher.
The researchers concluded SFI "demonstrated sound clinimetric properties with lower response errors, efficient completion and scoring and improved responsiveness and overall clinimetric performance compared with FRI."
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