Outcome MeasuresFree preview, no signup

HOOS Calculator

Try a shortened preview of the Hip disability and Osteoarthritis Outcome Score below, free, no account. In a real chart, the full instrument scores automatically and charts every domain over time.

Try it now Start free

HOOS, simplified preview

0 of 15 answered

Pain

Pain while walking on a flat surface

Pain going up or down stairs

Pain at night while in bed

Symptoms

Hip stiffness after first waking

Clicking, catching, or other noise from the hip

Limited range of motion

Function, daily living

Rising from sitting

Putting on socks or stockings

Getting in or out of a car

Function, sport & recreation

Squatting

Running

Twisting or pivoting on your loaded hip

Quality of life

Awareness of your hip problem

Modified your lifestyle to avoid damaging the hip

Confidence in your hip

Answer every item to see the domain scores.

This is a shortened, illustrative version. The full instrument has 42 items across these same 5 domains. Nothing here is saved; sign in to score the full version against a real patient.

Hip disability and Osteoarthritis Outcome Score

What the HOOS measures

The Hip disability and Osteoarthritis Outcome Score (HOOS) is a 40-item questionnaire with five subscales: Pain, Symptoms, Activities of Daily Living, Sport and Recreation, and Hip-related Quality of Life. It was developed by Nilsdotter and colleagues in 2003 as the hip counterpart to the KOOS.

The calculator above is a shortened preview with three items per subscale. It is not the validated instrument. Use the full 40-item HOOS for clinical decisions.

How the full HOOS is scored

Each item is answered on a 5-point scale from 0 (none) to 4 (extreme).
For each subscale, average the item responses.
Transform each subscale to 0–100, where 100 means no problems: 100 − (mean × 100 ÷ 4).

As with the KOOS, the subscales are reported separately rather than combined into one total.

Interpreting the subscales

Each subscale is read on its own 0–100 scale:

Subscale	Items in the full HOOS
Pain	10
Symptoms (including stiffness)	5
Activities of daily living	17
Sport and recreation	4
Hip-related quality of life	4

100 means no hip problems and 0 means extreme problems. There are no official severity bands.

What counts as a meaningful change

As with the KOOS, a change of about 8 to 10 points on a subscale is commonly treated as clinically meaningful. Studies after hip replacement report thresholds that vary by subscale.

Track the subscale that matches the patient's goal, and look for a consistent trend across visits.

Using the HOOS in your clinic

Physiotherapists use the HOOS for hip osteoarthritis, femoroacetabular impingement and rehabilitation after hip replacement. In Zdrovia, the score is saved to the chart at each visit and graphed automatically. See how that works for physiotherapy clinics.

Frequently asked questions

How is the HOOS scored?

Average the items in each of the five subscales, then transform to 0–100 with 100 − (mean × 100 ÷ 4). Report each subscale separately; 100 means no problems.

What is the difference between the HOOS and the KOOS?

They share the same structure and scoring. The HOOS asks about the hip and has 40 items; the KOOS asks about the knee and has 42.

What is the MCID for the HOOS?

About 8–10 points per subscale is commonly used. Published estimates vary by subscale and population.

Is this the full HOOS?

No. The calculator on this page is a 15-item preview to show how subscale scoring works. Use the full 40-item HOOS, which is free to use, for clinical assessment.

Sources

This page is a reference for clinicians, not medical advice. Scoring conventions and change thresholds vary between studies; follow your profession's guidance and the instrument's official user manual.

How it works in the app

Score once. Trend forever.

Drop in the block

Add an Outcome Measure Smart Block to any hip chart template: intake, re-assessment, or discharge.

Score it in the visit

The patient answers, or you do it with them. Each domain score computes live, the same way PHQ-9 and GAD-7 already do in Zdrovia today.

Watch it trend

Every domain score across every visit lands on one chart automatically, no spreadsheet, no re-typing old scores to see if the patient is improving.

No spreadsheet required

Five domains, five lines on one chart

Pain can drop while function stays flat, or the reverse. Keeping the domains separate on the chart, instead of one blended number, is what makes the trend actually useful in a visit.