KOOS-12 - Knee injury and Osteoarthritis Outcome Score (Short Form)

A concise 12-item questionnaire assessing knee function across three domains: pain (4 items), function in daily living (4 items), and quality of life (4 items). Derived from the full KOOS questionnaire for reduced respondent burden.

Instructions:

Answer all questions about your knee based on your experiences over the past week. Select the response that best describes your situation. If you did not perform an activity, give your best estimate of your ability.

Pain

1. How often do you experience knee pain?

Never

Monthly

Weekly

Daily

Always

2. What amount of knee pain have you experienced in the last week during walking on a flat surface?

None

Mild

Moderate

Severe

Extreme

3. What amount of knee pain have you experienced in the last week during going up or down stairs?

None

Mild

Moderate

Severe

Extreme

4. What amount of knee pain have you experienced in the last week during sitting or lying?

None

Mild

Moderate

Severe

Extreme

Function, Daily Living

5. Rising from sitting

None

Mild

Moderate

Severe

Extreme

6. Standing

None

Mild

Moderate

Severe

Extreme

7. Getting in/out of a car

None

Mild

Moderate

Severe

Extreme

8. Twisting/pivoting on your knee

None

Mild

Moderate

Severe

Extreme

Quality of Life

9. How often are you aware of your knee problem?

Never

Monthly

Weekly

Daily

Constantly

10. Have you modified your lifestyle to avoid activities potentially damaging to your knee?

Not at all

Mildly

Moderately

Severely

Totally

11. How much are you troubled with lack of confidence in your knee?

Not at all

Mildly

Moderately

Severely

Extremely

12. In general, how much difficulty do you have with your knee?

None

Mild

Moderate

Severe

Extreme

Patient Watch Form - 4/2/2026