Validity and sensitivity to change of the Patient Specific Functional Scale used during rehabilitation following proximal humeral fracture

Abstract

Purpose: To describe content validity, concurrent validity, sensitivity to change, internal consistency and the outcome distribution of the Patient Specific Functional Scale (PSFS) in patients with proximal humeral fracture. Method: Fifty-three patients with proximal humeral fracture treated conservatively or surgically with plate and screw or intramedullary nail were recruited 6 weeks (±1 week) post-trauma or post-surgery. The following assessments were used: the PSFS, patient global score, shoulder function assessment, grip strength and Western Ontario Osteoarthritis of the shoulder Index (WOOS), before start of (n = 53) and after (n = 22) 2–3 months of group rehabilitation. Results: In total, 96% of the activities stated in the PSFS was classified in the International Classification of Functioning, Disability and Health activity component and 62% were found in the WOOS. Correlations between measures were low. The PSFS was highly sensitive to change to a period of group rehabilitation. All questions of the PSFS contributed to the total score. Both floor and ceiling effects could be noted. Conclusion: The PSFS shows satisfying measurement properties and may be a useful complement in the evaluation of individual changes during a period of rehabilitation after proximal humeral fracture.Implications for RehabilitationThe PSFS assesses on activity level in patients with proximal humeral fracture.The PSFS is sensitive to change for group rehabilitation after humeral fracture.The PSFS can be useful for goal-setting, motivating and individually tailoring rehabilitation activities. The PSFS should be used in addition to specific measures of body functions and general health.