What is a RAPID3 score?

RAPID3 (Routine Assessment of Patient Index Data 3) is a patient-reported measure for rheumatoid arthritis. It combines physical function (from MDHAQ), pain and a global assessment of arthritis activity into a total usually scored 0 to 30.

How do you calculate RAPID3?

Complete the MDHAQ physical function questions (converted to 0–10), then add pain (0–10) and patient global assessment (0–10). RAPID3 total = physical function + pain + patient global, giving a range of 0 to 30.

What is a good RAPID3 score?

Lower scores generally mean less disease activity. Research cut-offs on the 0–30 scale often use 3 or below for remission, above 3 to 6 for low severity, above 6 to 12 for moderate, and above 12 for high. Your rheumatologist interprets your result in context.

What does RAPID3 physical function measure?

Physical function comes from the MDHAQ — ten daily activities rated for difficulty (0 = without difficulty to 3 = unable to do). The sum is converted to a 0–10 function score before adding pain and global assessment.

Does Hurtl calculate RAPID3 automatically?

Yes. Hurtl calculates a RAPID3 estimate from your daily logs — pain, daily activities and overall wellbeing — with a 7-day trend on the Condition tab. Log once a day and your score updates automatically.

How often should RAPID3 be measured?

In clinic, RAPID3 is often completed at rheumatology appointments. For personal tracking, logging pain, function and flares regularly gives a clearer picture than trying to recall how the past month felt from memory.

4 June 2026

RAPID3 Calculator – Calculate Your RAPID3 Score

By Tom, founder of Hurtl.

Use the RAPID3 calculator below to estimate your score from MDHAQ physical function, pain and patient global assessment. You can also read how RAPID3 is calculated and what your result means.

RAPID3 calculator

Complete the MDHAQ physical function questions below (0–3 each), then enter your pain and patient global assessment (0–10 each). Your physical function score is converted to 0–10 before adding the three domains for a RAPID3 total of 0–30.

Physical function (MDHAQ)

How much difficulty have you had in the past week?

1. Dress yourself, including tying shoelaces and doing buttons

2. Get in and out of bed

3. Lift a full cup or glass to your mouth

4. Walk outdoors on flat ground

5. Wash and dry your entire body

6. Bend down to pick up clothing from the floor

7. Turn regular faucets on and off

8. Get in and out of a car, bus, train, or airplane seat

9. Walk 2 miles or 3 kilometres

10. Participate in recreational activities and sports as you would like

Physical function score: 0.0 / 10

Pain & global assessment

Pain 0 = no pain, 10 = worst possible pain

Patient global assessment How active has your arthritis felt overall?

Your RAPID3 score: 0.0 / 30

Remission

Function 0.0 + Pain 0 + Global 0 = 0.0

For education only — not a diagnosis. Scores here are estimates from the values you enter. Your clinician may calculate RAPID3 differently at appointments. Hurtl’s in-app RAPID3 estimate is built from daily logs and may differ from a single self-assessment.

All rheumatology calculators · rheumatoid arthritis tracker

What is RAPID3?

RAPID3 stands for Routine Assessment of Patient Index Data 3. It was developed as a practical way to measure RA disease activity using only patient-reported information — no blood tests or imaging required for the score itself.

Rheumatologists use RAPID3 because it is:

Quick to complete in clinic or before a visit
Easy to repeat at each appointment for comparison
Focused on how you feel and function, not just lab results

RAPID3 is not a diagnosis tool. It is a snapshot of recent disease activity that supports monitoring and treatment discussions alongside examination, blood tests and imaging.

The three RAPID3 domains

RAPID3 combines three areas you rate yourself. In many clinics each domain is expressed on a 0 to 10 scale (0 = no problem, 10 = worst possible):

Physical function — difficulty with daily activities, from the MDHAQ (Multidimensional Health Assessment Questionnaire). Ten activities are scored 0–3 each and converted to a 0–10 function score.
Pain — overall pain you have felt over the assessment period
Patient global estimate — how active your arthritis has felt overall

How RAPID3 is calculated

RAPID3 total = Physical function + Pain + Patient global

When each domain is on a 0–10 scale, the total is usually 0 to 30.

Some clinics or research papers show the same information on a 0 to 100 scale. If your printout uses 0–100, check the label — the idea is the same, but the numbers look different.

Worked example (0–30 scale)

Domain	Score
Physical function	4.0
Pain	6
Patient global	5

RAPID3 total: 4.0 + 6 + 5 = 15.0

What do RAPID3 scores mean?

As a rough guide used in research and some clinics (0–30 scale):

RAPID3 score	Disease activity
≤ 3	Remission
> 3 to ≤ 6	Low severity
> 6 to ≤ 12	Moderate severity
> 12	High severity

A single score on one day is a snapshot. What matters more is the trend. These cut-offs are not rules you should apply on your own to change treatment.

Why memory makes RAPID3 hard at appointments

RAPID3 asks about recent weeks, but many people answer from how they feel today. That recency bias can make clinic scores less accurate than your real experience.

Tracking rheumatoid arthritis over time

You do not need to calculate RAPID3 manually every day. Log the underlying symptoms your rheumatologist will ask about — Hurtl turns them into a running RAPID3 estimate with a 7-day trend on the Condition tab.

See our rheumatoid arthritis symptom tracker to get started, browse all rheumatology calculators, or read why track symptoms between appointments.

This article explains RAPID3 for general information only. It is not medical advice, a diagnosis, or a recommendation to start, stop, or change treatment. RAPID3 scores should be interpreted by your rheumatologist in the context of your full clinical picture. Hurtl is not a medical device and does not provide clinical monitoring or treatment decisions.