How to Read Your Surgeon’s NJR Profile

Part of The Joint Replacement Guide — Phase 6: The Bigger Picture · Article 36 of 42 · Hip & Knee

Key Points

  • The National Joint Registry (NJR) publishes surgeon-level data publicly, and it’s a genuinely useful resource for patients.
  • Volume, revision rate, and patient-reported outcomes are the main figures worth understanding.
  • These figures need some context to interpret sensibly — raw numbers alone can be misleading.
  • You can view my own published NJR profile on the Surgical Outcomes page of this website.

What the NJR Is

The National Joint Registry collects data on the vast majority of hip, knee, shoulder, elbow and ankle replacements performed across England, Wales, Northern Ireland and the Isle of Man. Since 2013, it has published surgeon-level outcome data publicly, allowing anyone to look up a named consultant surgeon’s case volume and outcomes for their procedures — a level of transparency that is relatively unusual internationally and reflects a deliberate move towards openly published clinical outcomes in UK orthopaedics.

Case Volume

This shows how many procedures of a given type a surgeon has performed and had recorded in the registry. Higher volume, particularly for more complex procedures, is generally — though not universally — associated with better outcomes in surgical literature more broadly, reflecting the value of consistent, regular practice with a particular operation.

Revision Rate

This shows the proportion of a surgeon’s cases that have subsequently needed revision surgery, tracked over time. It’s an important figure, but needs context — revision rates are influenced by many factors beyond surgical technique, including the complexity of cases a particular surgeon takes on (a surgeon who regularly accepts more complex or higher-risk cases may show a somewhat higher revision rate for reasons unrelated to skill), and the NJR’s published methodology accounts for some of this through statistical adjustment, though it’s still worth understanding as context.

Patient-Reported Outcomes

Where available, PROMs data (introduced earlier in this guide) shows how patients themselves have rated their pain and function improvement after surgery with a particular surgeon, offering a complementary picture to the more clinical revision rate figure.

How to Use This Information Sensibly

NJR data is a genuinely valuable resource, but it works best as one part of a broader picture, alongside your own consultation, any recommendations you’ve received, and how comfortable you feel with a particular surgeon and team, rather than as the sole basis for a decision made from figures alone. Very small differences between individual surgeons’ published statistics are often not statistically meaningful, given the numbers involved, and shouldn’t necessarily be over-interpreted.

In More Depth

The NJR’s public reporting methodology has been refined considerably since its introduction, including statistical techniques to help account for case-mix differences between surgeons (essentially, adjusting for the fact that some surgeons take on more complex cases than others) — though, as with any large observational dataset, this adjustment is imperfect and published figures should be read as a useful indicator rather than a perfectly precise ranking. This transparency infrastructure, discussed further in the next article on GIRFT, is widely regarded as one of the most significant contributions to patient safety and quality improvement in UK orthopaedics over the past two decades.

This article is general information and does not replace individual clinical advice.

Sources

  • National Joint Registry — public surgeon-level reporting and methodology
  • NHS PROMs programme
  • GIRFT (Getting It Right First Time) — National Report on Orthopaedics

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