KneeSchool/Clinical Examination Academy/Oxford Knee Score
Oxford Knee Score
Page 4.22.5 · Examination Scoring Systems · examination page
A short questionnaire written for the arthritic knee and for the operation that replaces it.
The same topic at 4 depths
Each tier deepens the one below it and never repeats it. Choose the level you want.
Oxford Knee Score
Choose a depthFor Medical Students
What It Tests
The Oxford Knee Score asks about pain and the daily activities an arthritic knee interferes with, including walking, stairs, kneeling and getting out of a chair. 4.18.6 covers functional limitation.
It was written for patients having a knee replaced, so its items are the ones that change with that operation. 4.20.8 covers the replaced knee.
It matters that it is short, because a short questionnaire is the one that actually gets completed in a busy clinic. 4.22.8 covers the use of these scores.
How It Is Performed
Give it to the patient to complete themselves, before the consultation.
Explain the recall period the questions ask about.
Check completeness before scoring. 4.1.8 covers examination documentation.
Score it with the published method.
Record it with the date, before and after the operation, since the change is what it is for. 4.1.8 covers examination documentation.
Record the examination separately. 4.1.4 covers the structured approach.
Consider whether the patient's problem is the one the instrument asks about. 4.22.1 covers the IKDC.
What a Positive Means
A score before and after treatment, with the change between them, is the result.
A low score before a replacement describes the burden the operation is meant to relieve. 4.18.7 covers the arthroplasty assessment.
A score that does not improve after a technically satisfactory replacement is a finding that needs explaining. 4.20.8 covers the replaced knee.
A high score in a patient with severe radiographic change identifies someone coping, which raises the treatment threshold. 4.18.2 covers established disease.
An incomplete questionnaire is unscored.
No item count, score range or validation figure appears on this page. Those are properties of a published instrument and stating one from memory is the same class of claim as an invented citation, so the page describes what the instrument does and a reviewer with the questionnaire can add the numbers.
Key Learning Points
- The instrument was written for the arthritic knee and for replacement.
- Its items are the activities that change with the operation.
- Its brevity is why it gets completed.
- The change before and after is what it is for.
- A high score with severe change identifies someone coping.
MRCS Level
How It Is Performed
In a viva this is the arthroplasty outcome measure and the expected answer names the population it was written for.
The expected points are the self completion, the timing, the completeness, the published scoring, the before and after record, the separate examination record and the fit between instrument and problem.
Say that it was designed for the arthritic and the replaced knee. 4.20.8 covers the replaced knee.
Say that you would record it before and after rather than once. 4.1.8 covers examination documentation.
Say that it is a poor fit for a young sporting knee. 4.22.1 covers the IKDC.
What a Positive Means
The reasoning expected is that an instrument's items determine the population it measures well, and these items are daily activities rather than sporting ones. 4.18.6 covers functional limitation.
A short instrument trades detail for completion, which is a real gain in a service that collects scores routinely. 4.22.2 covers the KOOS.
A ceiling appears in anyone functioning above the level the items ask about, which is why a young athlete is not measured by it. 4.22.4 covers the Tegner scale.
A score that fails to improve after a sound operation points at the patient's expectation, another joint, or a cause of pain the operation does not address. 4.20.8 covers the replaced knee.
How Good It Is
The instrument is quick, well completed and reproducible in the population it was built for.
Its best contribution is being short enough to collect routinely, which makes a before and after record practical. 4.1.8 covers examination documentation.
It has a marked ceiling outside the arthritic population.
No examination finding corresponds to it. 4.1.6 covers that relationship.
No figures appear for any accuracy comparison on this page, under decision 023, and the comparison is the claim being made.
No item count, score range or validation figure appears on this page. Those are properties of a published instrument and stating one from memory is the same class of claim as an invented citation, so the page describes what the instrument does and a reviewer with the questionnaire can add the numbers.
Key Learning Points
- An instrument's items determine the population it measures well.
- A short instrument trades detail for completion.
- A ceiling appears above the level the items ask about.
- A sound operation with no score change points elsewhere.
- Being short enough to collect routinely is a real advantage.
FRCS Level
How Good It Is
At decision level this instrument is the routine arthroplasty measure, which makes its properties the ones most of the recorded outcome data carries.
A before and after pair is the evidence of an operation's effect for that patient, and a clinical impression is not. 4.22.8 covers the use of these scores.
A population of collected scores supports audit and registry comparison, which is the main institutional use. 4.1.8 covers examination documentation.
A patient whose problem sits outside the items needs a different instrument, and the examination identifies that. 4.22.2 covers the KOOS.
Expectation and the state of the other joints both shape the post operative score, so both are recorded before the operation. 4.18.7 covers the arthroplasty assessment.
Where It Misleads
The commonest error is using it in a young sporting knee, where the ceiling removes the information. 4.22.4 covers the Tegner scale.
A post operative score is interpreted without a pre operative one. 4.1.8 covers examination documentation.
Its scores are compared with another instrument's. 4.22.1 covers the IKDC.
A poor score is attributed to the knee when the hip, the spine or the other knee contributes. 4.2.15 covers referred pain.
An unexplained poor score is dismissed rather than investigated. 4.20.8 covers the replaced knee.
Key Learning Points
- Using it in a young sporting knee removes the information.
- A post operative score without a pre operative one is uninterpretable.
- Its scores are not comparable with another instrument's.
- A poor score may reflect another joint.
- An unexplained poor score is investigated rather than dismissed.
Fellowship Level
Where It Misleads
At fellowship level this instrument carries most of the routinely collected outcome data, so its limits propagate into the conclusions drawn from it.
Its ceiling truncates the better outcomes, which compresses the difference between a good result and an excellent one. 4.22.2 covers the KOOS.
Its items are daily activities, so a patient whose dissatisfaction is about sport, kneeling capacity or appearance is poorly described by a good score. 4.18.6 covers functional limitation.
Expectation predicts the post operative score strongly, which means a score difference between two services can reflect their populations rather than their surgery. 4.22.8 covers the use of these scores.
A single summed score discards the pattern, so two patients with the same total have different problems. 4.22.2 covers the KOOS.
Importance thresholds are published quantities this repository does not state, so a change here is described rather than judged against one. 4.2.10 covers severity.
No item count, score range or validation figure appears on this page. Those are properties of a published instrument and stating one from memory is the same class of claim as an invented citation, so the page describes what the instrument does and a reviewer with the questionnaire can add the numbers.
Key Learning Points
- The ceiling compresses the difference between good and excellent.
- A patient dissatisfied about sport or kneeling is poorly described by a good score.
- A difference between services can reflect populations rather than surgery.
- A single total discards the pattern.
- Importance thresholds are not stated here.
Explore Further
Where this topic came from and where it goes next in the spiral.
- 4.22.1IKDC
- 4.22.2KOOS
- 4.22.8PROMs in Clinical Practice
- 4.18.7Arthroplasty Assessment
- 4.20.8Total Knee Replacement
- 4.18.6Functional Limitation
References
No reference list is attached to this draft. Evidence verification has not run, because source retrieval was unavailable at generation time. Under the Operations Handbook a missing reference is acceptable and an invented one is a critical failure, so nothing has been cited and no citation marker appears in the text. This page carries no diagnostic accuracy figure, which is decision 023 rather than an omission. The comparative standing of these tests is standard teaching and a specific sensitivity written from memory is the same class of claim as an invented citation, so ACC-001 refuses the number and the page states the comparison. A reviewer with the literature can add the figures into How Good It Is without restructuring the page, and chapter 3.17 lists the studies the figures would come from. Any measurement here, including a flexion angle, is written from standard teaching, has not been checked, and is registered under decision 006 in pipeline/config/figures with a verification state of UNVERIFIED_FROM_MEMORY.
Safety. KneeSchool is educational and does not give individual medical advice. Seek urgent assessment for a knee that cannot bear weight after an injury, a hot swollen knee with a fever, or new numbness, weakness or coldness in the leg or foot.