When to Use

• Short-form assessment of physical function in patients with knee issues.
• Efficient large-scale screening in busy clinical or research settings.
• Monitoring functional recovery after knee surgery or conservative treatment.

Clinical Objective

Item Selection (7 Total)

1. 11. Rising from bed / getting in/out of bed.
2. 22. Putting on / taking off socks.
3. 33. Rising from a low chair.
4. 44. Getting in / out of a car.
5. 55. Going up / down stairs.
6. 66. Squatting.
7. 77. Running / jumping.

Scoring Logic

Items are rated 0 (None) to 4 (Extreme). A raw sum score (0–28) is calculated first.

Rasch Conversion

Function vs. Full KOOS

While the KOOS-PS is efficient for tracking "Physical Function," it lacks the "Symptoms," "Pain," and "Quality of Life" domains of the full KOOS. It is best used as a rapid screening tool rather than a comprehensive outcome measure.

Clinical Pearls

Management Decisions

1. 1Low Functional Score: Prioritize range of motion and weight-bearing strengthening.
2. 2Progression: If function improves but the patient still reports "locking" or "giving way," consider switching to the full KOOS to capture the "Symptoms" domain.
3. 3Research Data: Ensure the interval-converted score is used for any statistical comparisons.

Related Tools

Standard Reference