PROMs

Knee Injury and Osteoarthritis Outcome Score - Short form (KOOS PS) Flow

Knee Injury and Osteoarthritis Outcome Score - Short form flow

Introduction

The Knee disability and Osteoarthritis Outcome Score (KOOS) – Physical Function Shortform (KOOS-PS)-Control is a 7-item measure of physical functional derived from the items of the Function, daily living and Function, sports and recreational activity subscales of the KOOS. As with the KOOS it is intended to elicit people’s opinions about the difficulties they experience with activity due to problems with their knee [1].

The Knee Injury and Osteoarthritis Outcome Score - Short form flow contains the Knee Injury and Osteoarthritis Outcome Score - Short form (KOOS PS) questionnaire and associated calculation. After form submission, the Knee Injury and Osteoarthritis Outcome Score - Short form calculation is executed automatically. It's easy to extend this flow with conditional logic based on the interpretation of the Knee Injury and Osteoarthritis Outcome Score - Short form calculation.

Knee Injury and Osteoarthritis Outcome Score - Short form (KOOS PS) questionnaire

Questions and Scoring

All seven items are coded from 0 to 4, none to extreme respectively.

  1. Rising from bed
  2. Putting on socks/stockings
  3. Rising from sitting
  4. Bending to floor
  5. Twisting/pivoting on your injured knee
  6. Kneeling
  7. Squatting

Interpretation

KOOS-PS can be scored in two directions:

  1. From no difficulty (0) to extreme difficulty (100), as in the original KOOS-PS publication [1]
  2. From extreme difficulty (0) to no difficulty (100) in accordance with KOOS.

The method of interpretation used in Awell is according to direction #2 (0 = extreme difficulty and 100 = no difficulty).

Nomogram for converting raw summed KOOS-PS scores to 0 representing extreme difficulty and 100 representing no difficulty:

References

[1] Perruccio AV, Lohmander, LS, Canizares M, Tennant A, Hawker GA, Conaghan PG, Roos EM, Jordan JM, Maillefert JF, Dougados M, Davis AM. The Development of a Short Measure of Physical Function for Knee OA - KOOS-Physical Function Short-form (KOOS-PS) – An OARSI/OMERACT Initiative. Osteoarthritis and Cartilage, 2008; 16: 542-550.

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