Sportshealing Knee Score

For Medical Students

What It Tests

This score asks about seven things: pain, sleep, swelling, stiffness, instability, stairs and function. 4.18.6 covers functional limitation.

Those seven are what the architecture specifies, and they are what this page can describe. 4.1.4 covers the structured approach.

What is not in this repository is the wording of the items, the response options, the scoring, any weighting between the seven, and any validation work. None of those is written here, because writing them from memory would invent an instrument rather than describe one. 4.22.8 covers the use of these scores.

How It Is Performed

The seven contributors are the ones named above, and each would be asked of the patient directly.

Pain and sleep together separate a knee that hurts on use from one that hurts at rest, which is the distinction that marks a later stage. 4.2.13 covers night pain.

Swelling records the activity of the joint rather than its structure. 4.6.3 covers the effusion assessment.

Stiffness records the capsular and synovial response, which is the symptom that eases with movement. 4.2.4 covers stiffness.

Instability records the symptom rather than the examination finding, and the two diverge. 4.2.2 covers instability.

Stairs and function record the activities the patient has lost, which is the part a treatment decision uses. 4.7.9 covers the functional range.

Administration, scoring and interpretation are not specified in this repository, so no instruction for them appears here. 4.1.8 covers examination documentation.

What a Positive Means

Nothing on this page states what a score means, because no scoring exists in this repository to read a score against.

The seven contributors each describe a domain, and a profile across them would be the natural result of an instrument built on them. 4.22.2 covers the KOOS.

Including sleep is a choice the established instruments make differently, and it is a deliberate difference rather than an omission elsewhere. 4.2.13 covers night pain.

Including instability alongside arthritic symptoms spans two populations that the existing instruments usually separate. 4.22.3 covers the Lysholm score.

Whether that span is a strength or a weakness is a question the validation would answer and this repository cannot. 4.22.8 covers the use of these scores.

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.

MRCS Level

How It Is Performed

A candidate asked about this score can say what it covers and should say what is not published.

The honest account is the seven contributors, the absence of published scoring, and the absence of validation.

Say that an unvalidated instrument is used for description and not for comparison with published series. 4.22.8 covers the use of these scores.

Say which established instrument would be used instead for a given population. 4.22.5 covers the Oxford Knee Score.

Say that a new instrument needs validation work before its scores mean anything across patients. 4.1.6 covers that relationship.

What a Positive Means

The reasoning expected is that an instrument's meaning comes from its development and validation rather than from its items looking sensible. 4.22.8 covers the use of these scores.

A set of plausible domains is a starting point for an instrument, not an instrument, which is the position this score is in. 4.22.2 covers the KOOS.

Weighting is the part that cannot be reasoned out, since the relative importance of sleep against stairs is an empirical question. 4.2.10 covers severity.

Until that work exists, the seven contributors are useful as a checklist for a consultation rather than as a score. 4.18.6 covers functional limitation.

How Good It Is

Nothing in this repository supports a statement about how good this score is.

Its best current use is as a reminder of seven domains to ask about, which is a clinical checklist rather than a measurement. 4.1.4 covers the structured approach.

It cannot be compared with any published series, because no scoring and no validation exist here.

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.

FRCS Level

How Good It Is

At decision level an unvalidated instrument is not used for a decision, and saying so is the whole of this section.

The seven domains are a reasonable coverage of what an arthritic or unstable knee costs a patient, which is a content argument rather than evidence. 4.18.6 covers functional limitation.

A validated instrument exists for each of the populations this one spans, so there is no decision for which this score is the only option. 4.22.1 covers the IKDC.

If this score is to be used, it is collected alongside a validated instrument so that the two can later be compared. 4.22.8 covers the use of these scores.

The development work that would change this position is a methodological project, and naming it is more useful than approximating it. 4.1.8 covers examination documentation.

Where It Misleads

The commonest error available here is presenting an unvalidated score as if it were validated. 4.22.8 covers the use of these scores.

A plausible item list invites the assumption that the instrument works, which is exactly the assumption validation exists to test. 4.22.2 covers the KOOS.

A score collected without a validated comparator cannot later be interpreted, which wastes the collection. 4.22.1 covers the IKDC.

Weighting the seven domains by judgement would produce a number that looks like a measurement. 4.2.10 covers severity.

Using it for a published comparison would misstate what the number is. 4.22.5 covers the Oxford Knee Score.

Fellowship Level

Where It Misleads

At fellowship level the interesting question is what it would take for this score to mean something, and this repository can state the shape of that work without doing it.

Item generation, item reduction, response scaling, scoring, reliability, validity against existing instruments and responsiveness are the stages, and none of them is in this repository. 4.22.8 covers the use of these scores.

The seven domains overlap, so an unreduced item set would double count: sleep and pain, stiffness and function, stairs and function are each pairs that move together. 4.18.6 covers functional limitation.

Spanning instability and arthritic symptoms means the instrument would need validating in both populations, which is twice the work and is the price of the breadth. 4.22.3 covers the Lysholm score.

A site specific instrument invites the suspicion that it exists to produce favourable numbers, and the defence against that is published development work rather than assertion. 4.23.7 covers the medico legal setting.

Until then the honest description is the one on this page, which is seven domains and no instrument. 4.1.8 covers examination documentation.

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.