KneeFACTS Knee injury and the biological basis for outcomes: How does local and systemic inflammation affect outcomes including pain and function following knee injury, a prospective observational study.

A knee injury triggers a chain reaction of inflammation, pain, and psychological distress that researchers will track in real time by analysing blood, knee fluid, and stool samples from patients within the first eight days of injury or surgery. Why this matters: Doctors know that some people recover well from knee injuries while others develop chronic pain and long-term disability, but the biological reasons for this difference remain unclear. This study aims to connect the dots between the immune system’s inflammatory response, the patient’s psychological state, and how well the knee actually functions up to a year later. If this research succeeds, it could change how clinicians treat knee injuries. Instead of a one-size-fits-all approach, they might tailor treatments based on a patient’s individual inflammatory profile—for example, using anti-inflammatory drugs or psychological support at specific points in recovery. This could reduce the number of people who end up with persistent pain, limited mobility, or the need for further surgery. The findings may also inform rehabilitation protocols and help identify patients at highest risk of poor outcomes early on, allowing for more targeted interventions.