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Abstract
Both length of hospital stay and discharge to a skilled nursing facility are key drivers of total knee arthroplasty (TKA)-associated spending. Identifying patients who require increased postoperative care may improve expectation setting, discharge planning, and cost reduction. Balance deficits affect patients undergoing TKA and are critical to recovery. We aimed to assess whether a device that measures preoperative balance predicts patients' rehabilitation needs and outcomes after TKA.40 patients indicated for primary TKA were prospectively enrolled and followed for 12 months. Demographics, KOOS-JR, and PROMIS data were collected at baseline, 3-months, and 12-months. Single-leg balance and sway velocity were assessed preoperatively with a force plate (Sparta Science, Menlo Park, CA). The primary outcome was patients' discharge facility (home versus skilled nursing facility). Secondary outcomes included length of hospital stay, KOOS-JR scores, and PROMIS scores.The mean preoperative sway velocity for the operative leg was 5.7?±?2.7 cm/s, which did not differ from that of the non-operative leg (5.7?±?2.6 cm/s, p?=?1.00). Five patients (13%) were discharged to a skilled nursing facility and the mean length of hospital stay was 2.8?±?1.5 days. Sway velocity was not associated with discharge to a skilled nursing facility (odds ratio, OR?=?0.82, 95% CI?=?0.27-2.11, p?=?0.690) or longer length of hospital stay (b = -0.03, SE?=?0.10, p?=?0.738). An increased sway velocity was associated with change in PROMIS items from baseline to 3 months for global07 ("How would you rate your pain on average?" b?=?1.17, SE?=?0.46, p?=?0.015) and pain21 ("What is your level of pain right now?" b?=?0.39, SE?=?0.17, p?=?0.025) at 3-months.Preoperative balance deficits were associated with postoperative improvements in pain and function after TKA, but a balance focused biometric that measured single-leg sway preoperatively did not predict discharge to a skilled nursing facility or length of hospital stay after TKA making their routine measurement cost-ineffective.
View details for DOI 10.1186/s12891-024-07580-1
View details for PubMedID 38880892
View details for PubMedCentralID 4169369