Supervised physiotherapy after ACL reconstruction wins early, then the gap closes

Design

parallel-group randomised trial, unblinded, 12 months of follow-up

Population

184 adults aged 18-40 with persistent knee problems 9-36 months after ACL reconstruction

Primary outcome

change in composite KOOS4 score at four months

Effect

14.1 vs 9.4 points; adjusted difference 4.8 (95% CI 1.4 to 8.2)

A community trial in Australia randomised 184 adults aged 18 to 40 with persistent knee problems 9 to 36 months after anterior cruciate ligament reconstruction to four months of twice-weekly physiotherapist-supervised exercise with education, or to a single education session with a self-directed exercise resource.

At four months the composite Knee injury and Osteoarthritis Outcome Score improved 14.1 points in the supervised group against 9.4 in the control group, an adjusted difference of 4.8 points (95% CI 1.4 to 8.2). Supervised patients gained more thigh muscle strength and reported success more often - for pain, 73% against 40%. By twelve months the difference had narrowed, because the control group kept improving while the supervised group held its gains. Cartilage thickness and composition on MRI did not differ at either point.

So supervision buys a faster and more certain recovery rather than a different endpoint, at least within a year. That is still worth something to a 30-year-old whose knee has been a problem for two years, and it is an honest thing to tell them. Participants were unblinded, which inflates patient-reported outcomes in favour of the more intensive arm.

• Offer supervised physiotherapy for the speed of recovery, not for a different one-year outcome.
• Self-directed exercise with one education session was not ineffective - the control group improved substantially.
• No difference in cartilage on MRI, so neither arm demonstrably altered joint structure.
• Tell patients honestly that the between-group gap narrows by twelve months.
• Where supervised physiotherapy is unaffordable, a structured self-directed programme is a defensible alternative.

Why it matters

It reframes supervised rehabilitation as buying time rather than buying a better final result, which changes what you promise the patient.

Don't overread it

Participants were unblinded, and the primary outcome is patient-reported - some of the four-month advantage is expectation.

The statistics, in plain English

The 95% confidence interval runs from 1.4 to 8.2 points, and its lower end sits below what most people would call a noticeable change on this score - so the trial establishes that supervision helps without establishing that the help is large. The narrowing at twelve months is the more useful finding, and it is the kind that gets lost when only the primary timepoint is reported.

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