Implementation and validation of a novel clinical bedside tool (Time-Up and Flex) in rehabilitation for geriatric hip fracture patients post hip fracture surgery

Abstract

Objective: Fragility fractures in the elderly population is increasing due to the global aging population. Rehabilitation following hip fracture surgery plays a crucial role in restoring functional independence and quality of life. There are currently limited bedside rehabilitation tool for geriatric hip fracture patients. A novel tool (Time-Up and Flex [TUF]) was designed with the aim to allow patients perform bedside rehab exercises, provide objective feedback and enhance recovery. Design: A single centre, double-blinded, prospective validation study. A 3D printed TUF tool measures time taken to actively flex the operated hip to 30° on post-operative days [POD] 1, 7 and 14. The time is compared against subjective (Numerical Patient Reported Pain Scale [NPRS]) and objective outcomes (Tinetti Scale [TS], Functional Ambulation Category [FAC]). Assessors of the TUF score are blinded to the assessors of patient report outcome measures. Results: Mean time for TUF were 12.7 s (seconds), 9.5 s and 6.7 s, NPRS were 7.3, 4.8, 3.2, TS were 9.8, 14.1, 18.6, FAC were 1.2, 2.0, 3.1 on POD1, 7 and 14 respectively. Coefficient of correlation for TUF time against NPRS was 0.729 (p < 0.05), TUF time against TS was -0.721 (p < 0.05), TUF time against FAC -0.688 (p < 0.05). A decrease in TUF time correlated to a statistically significant decrease in NPRS, increase in TS and FAC. The calculated Cohen's D and Cronbach Alpha for TUF tool supported its ability to produce consistent and valid results. Conclusion: TUF tool is valid and correlates with patient's subjective and objective outcomes. It has a good predictor value for the patient's pain, mobility and future falls risk. TUF tool has potential to be incorporated into geriatric hip fracture rehabilitation pathway in the future.