KOOS - Knee injury and Osteoarthritis Outcome Score

A comprehensive questionnaire assessing knee function across five domains: pain, symptoms, activities of daily living, sport/recreation, and quality of life.

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.

Symptoms

S1. Do you have swelling in your knee?

Never

Rarely

Sometimes

Often

Always

S2. Do you feel grinding, hear clicking, or any other type of noise when your knee moves?

Never

Rarely

Sometimes

Often

Always

S3. Does your knee catch or hang up when moving?

Never

Rarely

Sometimes

Often

Always

S4. Can you straighten your knee fully?

Always

Often

Sometimes

Rarely

Never

S5. Can you bend your knee fully?

Always

Often

Sometimes

Rarely

Never

S6. How severe is your knee joint stiffness after first wakening in the morning?

None

Mild

Moderate

Severe

Extreme

S7. How severe is your knee joint stiffness after sitting, lying, or resting later in the day?

None

Mild

Moderate

Severe

Extreme

Pain

P1. How often do you experience knee pain?

Never

Monthly

Weekly

Daily

Always

P1. How often do you experience knee pain?

Never

Monthly

Weekly

Daily

Always

P2. Twisting/pivoting on your knee

None

Mild

Moderate

Severe

Extreme

P2. Twisting/pivoting on your knee

None

Mild

Moderate

Severe

Extreme

P3. Straightening knee fully

None

Mild

Moderate

Severe

Extreme

P3. Straightening knee fully

None

Mild

Moderate

Severe

Extreme

P4. Bending knee fully

None

Mild

Moderate

Severe

Extreme

P4. Bending knee fully

None

Mild

Moderate

Severe

Extreme

P5. Walking on flat surface

None

Mild

Moderate

Severe

Extreme

P5. Walking on flat surface

None

Mild

Moderate

Severe

Extreme

P6. Going up or down stairs

None

Mild

Moderate

Severe

Extreme

P6. Going up or down stairs

None

Mild

Moderate

Severe

Extreme

P7. At night while in bed

None

Mild

Moderate

Severe

Extreme

P7. At night while in bed

None

Mild

Moderate

Severe

Extreme

P8. Sitting or lying

None

Mild

Moderate

Severe

Extreme

P8. Sitting or lying

None

Mild

Moderate

Severe

Extreme

P9. Standing upright

None

Mild

Moderate

Severe

Extreme

P9. Standing upright

None

Mild

Moderate

Severe

Extreme

Function, Daily Living

A1. Descending stairs

None

Mild

Moderate

Severe

Extreme

A1. Descending stairs

None

Mild

Moderate

Severe

Extreme

A2. Ascending stairs

None

Mild

Moderate

Severe

Extreme

A2. Ascending stairs

None

Mild

Moderate

Severe

Extreme

A3. Rising from sitting

None

Mild

Moderate

Severe

Extreme

A3. Rising from sitting

None

Mild

Moderate

Severe

Extreme

A4. Standing

None

Mild

Moderate

Severe

Extreme

A4. Standing

None

Mild

Moderate

Severe

Extreme

A5. Bending to the floor/pick up an object

None

Mild

Moderate

Severe

Extreme

A5. Bending to the floor/pick up an object

None

Mild

Moderate

Severe

Extreme

A6. Walking on a flat surface

None

Mild

Moderate

Severe

Extreme

A6. Walking on a flat surface

None

Mild

Moderate

Severe

Extreme

A7. Getting in/out of car

None

Mild

Moderate

Severe

Extreme

A7. Getting in/out of car

None

Mild

Moderate

Severe

Extreme

A8. Going shopping

None

Mild

Moderate

Severe

Extreme

A8. Going shopping

None

Mild

Moderate

Severe

Extreme

A9. Putting on socks/stockings

None

Mild

Moderate

Severe

Extreme

A10. Rising from bed

None

Mild

Moderate

Severe

Extreme

A11. Taking off socks/stockings

None

Mild

Moderate

Severe

Extreme

A11. Taking off socks/stockings

None

Mild

Moderate

Severe

Extreme

A12. Lying in bed (turning over, maintaining knee position)

None

Mild

Moderate

Severe

Extreme

A12. Lying in bed (turning over, maintaining knee position)

None

Mild

Moderate

Severe

Extreme

A13. Getting in/out of bath

None

Mild

Moderate

Severe

Extreme

A13. Getting in/out of bath

None

Mild

Moderate

Severe

Extreme

A14. Sitting

None

Mild

Moderate

Severe

Extreme

A14. Sitting

None

Mild

Moderate

Severe

Extreme

A15. Getting on/off toilet

None

Mild

Moderate

Severe

Extreme

A16. Heavy domestic duties (moving heavy boxes, scrubbing floors, etc)

None

Mild

Moderate

Severe

Extreme

A17. Light domestic duties (cooking, dusting, etc)

None

Mild

Moderate

Severe

Extreme

A17. Light domestic duties (cooking, dusting, etc)

None

Mild

Moderate

Severe

Extreme

Function, Sports and Recreational Activities

SP1. Squatting

None

Mild

Moderate

Severe

Extreme

SP2. Running

None

Mild

Moderate

Severe

Extreme

SP3. Jumping

None

Mild

Moderate

Severe

Extreme

SP4. Twisting/pivoting on your injured knee

None

Mild

Moderate

Severe

Extreme

SP5. Kneeling

None

Mild

Moderate

Severe

Extreme

Quality of Life

Q1. How often are you aware of your knee problem?

Never

Monthly

Weekly

Daily

Constantly

Q2. Have you modified your life style to avoid activities potentially damaging to your knee?

Not at all

Mildly

Moderately

Severely

Totally

Q3. How much are you troubled with lack of confidence in your knee?

Not at all

Mildly

Moderately

Severely

Extremely

Q3. How much are you troubled with lack of confidence in your knee?

Not at all

Mildly

Moderately

Severely

Extremely

Q4. In general, how much difficulty do you have with your knee?

None

Mild

Moderate

Severe

Extreme

Patient Watch Form - 4/2/2026