Effect of Inpatient Rehabilitation vs a Monitored Home-Based Program on Mobility in Patients With Total Knee Arthroplasty: The HIHO Randomized Clinical Trial.

Importance: Formal rehabilitation programs, including inpatient programs, are often assumed to optimize recovery among patients after undergoing total knee arthroplasty. However, these programs have not been compared with any outpatient or home-based programs. Objective: To determine whether 10 days of inpatient rehabilitation followed by a monitored home-based program after total knee arthroplasty provided greater improvements than a monitored home-based program alone in mobility, function, and quality of life. Design, Setting, and Participants: In this 2-group, parallel, randomized clinical trial, including a nonrandomized observational group, conducted at 2 public, high-volume arthroplasty hospitals in Sydney, Australia (July 2012-December 2015), 940 patients with osteoarthritis undergoing primary total knee arthroplasty were screened for eligibility. Of the 525 eligible patients consecutively invited to participate, 165 were randomized either to receive inpatient hospital rehabilitation and home-based rehabilitation or to receive home-based rehabilitation alone, and 87 patients enrolled in the observation group. Interventions: Eighty-one patients were randomized to receive 10 days of hospital inpatient rehabilitation followed by an 8-week clinician-monitored home-based program, 84 were randomized to receive the home-based program alone, and 87 agreed to be in the observational group, which included only the home-based program. Main Outcomes and Measures: Mobility at 26 weeks after surgery, measured with the 6-minute walk test. Secondary outcomes included the Oxford Knee Score, which ranges from 0 (worst) to 48 (best) and has a minimal clinically important difference of 5 points; and EuroQol Group 5-Dimension Self-Report Questionnaire (EQ-5D) visual analog scale, which ranges from 0 (worst) to 100 (best), and has a minimal clinically important difference of 23 points. Results: Among the 165 randomized participants, 68% were women, and the cohort had a mean age, 6