HAQ-DI (Health Assessment Questionnaire Disability Index)
Health Assessment Questionnaire Disability Index (HAQ-DI; Fries 1980) — the mean of 8 functional-category scores, each 0-3 (0 no difficulty to 3 unable).
Open the calculator → Runs in your browser. Data leaves only if you deliberately send a problem report from the interactive tool.
Example
- Dressing & grooming difficulty
- 1
- Dressing & grooming
- Yes
- Arising difficulty
- 2
- Eating difficulty
- 2
- Walking difficulty
- 2
- Hygiene difficulty
- 2
- Reach difficulty
- 2
Result: HAQ-DI 2/3
The tool opens with these values already filled in. Replace them with your own.
What the result means
- ≤ 1
- Mild-to-moderate difficulty.
- > 1 to 2
- Moderate-to-severe disability.
- > 2
- Severe disability. Minimum clinically important difference ~0.22.
What you enter
- Dressing & grooming difficulty (0 none - 3 unable)
- Dressing & grooming: uses aids/devices or help from another person
- Arising difficulty (0 none - 3 unable)
- Arising: uses aids/devices or help from another person
- Eating difficulty (0 none - 3 unable)
- Eating: uses aids/devices or help from another person
- Walking difficulty (0 none - 3 unable)
- Walking: uses aids/devices or help from another person
The other 8 fields
- Hygiene difficulty (0 none - 3 unable)
- Hygiene: uses aids/devices or help from another person
- Reach difficulty (0 none - 3 unable)
- Reach: uses aids/devices or help from another person
- Grip difficulty (0 none - 3 unable)
- Grip: uses aids/devices or help from another person
- Common activities difficulty (0 none - 3 unable)
- Common activities: uses aids/devices or help from another person
How this is calculated
- Scoring
- Eight categories, each 0-3 (highest item). Aids/devices or help raise a category scored 0 or 1 to 2. HAQ-DI = mean of answered categories (>= 6 of 8 required).
Fries JF, Spitz P, Kraines RG, Holman HR. Measurement of patient outcome in arthritis. Arthritis Rheum. 1980;23(2):137-145. Eight functional categories, each 0-3; HAQ-DI = mean of the categories (>= 6 of 8 answered), range 0-3. Aids/help raise a category scored 0-1 to 2. Read the source ↗
A reference and educational tool. Not medical, legal, or financial advice, and not a substitute for clinician judgment.