HAQ-DI disability index
- Created by
- Renato Passos, Eng. de Software
- Reviewed by
- Renato Passos, Eng. de Software
Last updated: Apr 18, 2026
About this calculator
The HAQ-DI Disability Index Calculator is a tool used to assess the degree of disability in patients with rheumatological diseases, such as rheumatoid arthritis. The HAQ-DI is calculated based on the sum of 8 domains, which include everyday activities like dressing, getting up from a chair, eating, taking care of oneself, walking, using the bathroom, having sex, and performing physical activities.
The calculator works simply: for each domain, the patient answers a question about their ability to perform the activity, with response options ranging from 'no difficulty' to 'unable to perform'. The responses are then scored and summed, resulting in an index that ranges from 0 to 3, where 0 represents no disability and 3 represents total disability.
The HAQ-DI is an important tool for healthcare professionals, as it helps monitor disease progression and response to treatment. Additionally, it is useful for identifying areas where the patient needs additional help or support. It is essential to remember that the HAQ-DI should be used in conjunction with other clinical evaluations and exams to obtain a comprehensive view of the patient's condition.
It is crucial to exercise caution when interpreting HAQ-DI results, as they can be influenced by factors such as age, education level, and patient culture. Furthermore, the HAQ-DI is not a measure of pain or discomfort, but rather of functional disability.
Frequently asked questions
What is HAQ-DI and what is it used for?
HAQ-DI is a disability index that assesses a patient's ability to perform everyday activities. It is used to monitor disease progression and response to treatment in patients with rheumatological diseases.
How is HAQ-DI calculated?
HAQ-DI is calculated based on the sum of 8 domains, which include everyday activities. The patient answers questions about their ability to perform each activity, and the responses are scored and summed to obtain the index.
What are the possible results of HAQ-DI?
HAQ-DI can range from 0 to 3, where 0 represents no disability and 3 represents total disability.
Is HAQ-DI a measure of pain or discomfort?
No, HAQ-DI is a measure of functional disability, not pain or discomfort.
How to interpret HAQ-DI results?
HAQ-DI results should be interpreted with caution, considering factors such as age, education level, and patient culture. It is essential to use HAQ-DI in conjunction with other clinical evaluations and exams.