NSR — Hip Disability & Osteoarthritis Outcome Score (HOOS)
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Patient Information

Instructions

What is the HOOS? The Hip disability and Osteoarthritis Outcome Score (HOOS) is a patient-reported instrument that assesses your opinion about your hip and associated problems. Answer every question by selecting the option that best describes your situation in the past week. If you are unsure about how to answer a question, please give the best answer you can.

This questionnaire contains 40 questions across 5 subscales: Pain, Other Symptoms, Activities of Daily Living, Sport & Recreation, and Hip-Related Quality of Life. Each subscale is scored separately — a score of 100 indicates no disability and 0 indicates extreme disability.

Subscale 1 — Pain

These questions ask about pain you experience in your hip. For each activity, indicate how much pain you experience.

Question Never Monthly Weekly Daily Always
P1
How often do you experience hip pain?
P2
Straightening your hip fully
P3
Bending your hip fully
P4
Walking on a flat surface
P5
Going up or down stairs
P6
At night while in bed
P7
Sitting or lying down
P8
Standing upright
P9
Walking on a hard surface (asphalt, concrete, etc.)
P10
Walking on an uneven surface
🔒   CLINICIAN USE ONLY — Complete the score fields below after the patient finishes this questionnaire.

Score = 100 − [(sum ÷ 40) × 100]  ·  Higher = better. MCID: ~10 points.

Subscale 2 — Other Symptoms

These questions ask about other symptoms and signs associated with your hip. Indicate how often and how severe these apply to you.

Question Never Rarely Sometimes Often Always
S1
Do you feel grinding, hear clicking or any other type of noise from your hip?
S2
Difficulty spreading your legs wide apart
S3
Difficulty striding out when walking
S4
Stiffness after first wakening in the morning
S5
Stiffness after sitting, lying or resting later in the day
🔒   CLINICIAN USE ONLY — Complete the score fields below after the patient finishes this questionnaire.

Score = 100 − [(sum ÷ 20) × 100]

Subscale 3 — Function, Daily Living (ADL)

The following questions concern your physical function. By this we mean your ability to move around and look after yourself. For each activity, indicate the degree of difficulty you experience in the past week due to your hip.

Question None Mild Moderate Severe Extreme
A1
Descending stairs
A2
Ascending stairs
A3
Rising from sitting
A4
Standing
A5
Bending to the floor / picking up an object
A6
Walking on a flat surface
A7
Getting in / out of a car
A8
Going shopping
A9
Putting on socks / stockings
A10
Rising from bed
A11
Taking off socks / stockings
A12
Lying in bed (turning over, maintaining hip position)
A13
Getting in / out of a bath
A14
Sitting
A15
Getting on / off a toilet
A16
Heavy domestic duties (moving heavy boxes, scrubbing floors, etc.)
A17
Light domestic duties (cooking, dusting, etc.)
🔒   CLINICIAN USE ONLY — Complete the score fields below after the patient finishes this questionnaire.

Score = 100 − [(sum ÷ 68) × 100]

Subscale 4 — Function, Sport & Recreation

The following questions concern your physical function when being more active. For each activity, indicate the degree of difficulty you experience due to your hip in the past week. If an activity is limited by something other than your hip, mark the option that would apply if your hip were the only problem.

Question None Mild Moderate Severe Extreme
SP1
Squatting
SP2
Running
SP3
Twisting / pivoting on your loaded leg
SP4
Walking on uneven surfaces
🔒   CLINICIAN USE ONLY — Complete the score fields below after the patient finishes this questionnaire.

Score = 100 − [(sum ÷ 16) × 100]

Subscale 5 — Hip-Related Quality of Life (QoL)

These questions ask about your hip-related quality of life. Indicate how your hip affects your life overall.

Question Never Monthly Weekly Daily Constantly
Q1
How often are you aware of your hip problem?
Q2
Have you modified your lifestyle to avoid activities potentially damaging to your hip?
Q3
How much are you troubled with lack of confidence in your hip?
Q4
In general, how much difficulty do you have with your hip?
🔒   CLINICIAN USE ONLY — Complete the score fields below after the patient finishes this questionnaire.

Score = 100 − [(sum ÷ 16) × 100]

✓   End of Patient Questionnaire

Thank you for completing all sections of this questionnaire.
Please return this form to your therapist. The score summary below is for clinician use only.

🔒   CLINICIAN USE ONLY — Score Summary — for clinician use only. Do not ask the patient to complete this section.

Score Summary & Interpretation

Scoring reminder: Each subscale is scored independently. A score of 100 = no problems; a score of 0 = extreme problems. Subscales are NOT averaged into a single total score — each is interpreted separately. If more than 20% of items in any subscale are missing, that subscale cannot be scored.
Subscale Items (n) Raw Score Subscale Score (0–100) Formula
Pain 10 100 − [(raw ÷ 40) × 100]
Symptoms 5 100 − [(raw ÷ 20) × 100]
Activities of Daily Living 17 100 − [(raw ÷ 68) × 100]
Sport & Recreation 4 100 − [(raw ÷ 16) × 100]
Hip-Related Quality of Life 4 100 − [(raw ÷ 16) × 100]
MCID (Minimum Clinically Important Difference): A change of approximately 10 points on any subscale is generally considered clinically meaningful for patients with hip osteoarthritis or following hip replacement. MCID values may vary by patient population and surgical status.

Source: Roos EM, Klassbo M, Lohmander LS. Osteoarthritis Cartilage. 1999;7(4):335–345. HOOS is free for clinical and research use. © Ewa Roos, University of Southern Denmark. Full information and scoring instructions: www.koos.nu

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