Goal
Calculate the six-question BASDAI symptom score from 0–10 responses, showing the first-four sum and the morning-stiffness average separately.
BASDAI Symptom Score Calculator
Calculate the six-question BASDAI symptom score from 0–10 responses, showing the first-four sum and the morning-stiffness average separately.
Key facts
- What it does
- Calculate the six-question BASDAI symptom score from 0–10 responses, showing the first-four sum and the morning-stiffness average separately.
- Formula
BASDAI = [Q1 + Q2 + Q3 + Q4 + (Q5 + Q6)/2] / 5; all six inputs use a 0–10 response scale, with Q6 representing duration according to the approved questionnaire.- You enter
- Q1 — Fatigue or tiredness over the recall period · Q2 — Neck, back, or hip pain · Q3 — Pain or swelling in other joints · Q4 — Tenderness or discomfort to touch/pressure · Q5 — Severity of morning stiffness · Q6 — Duration of morning stiffness
- Worked example
- BASDAI = [2 + 2 + 1 + 1 + (3 + 3)/2] ÷ 5 = 2.20 out of 10.
A clearer path to an answer
From your question to a useful result
This page keeps the calculation transparent: define the goal, enter the matching values, inspect the method, and decide what the result means in your situation.
Inputs
Q1 — Fatigue or tiredness over the recall period · Q2 — Neck, back, or hip pain · Q3 — Pain or swelling in other joints · Q4 — Tenderness or discomfort to touch/pressure · Q5 — Severity of morning stiffness · Q6 — Duration of morning stiffness
Method
BASDAI = [Q1 + Q2 + Q3 + Q4 + (Q5 + Q6)/2] / 5; all six inputs use a 0–10 response scale, with Q6 representing duration according to the approved questionnaire.
Next step
Calculate, review the assumptions below, then compare a related tool when the decision needs more context.
BASDAI Symptom Score Calculator
Calculate the six-question BASDAI symptom score from 0–10 responses, showing the first-four sum and the morning-stiffness average separately.
Open the BASDAI Symptom Score Calculator pageMore health tools
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Result
Enter your values above and choose Calculate to see the result here.
Calculation map
Follow the path from input to answer
01
Inputs (6)
- Q1 — Fatigue or tiredness over the recall period Ready
- Q2 — Neck, back, or hip pain Ready
- Q3 — Pain or swelling in other joints Ready
- Q4 — Tenderness or discomfort to touch/pressure Ready
- +2 more inputs
02
Formula
BASDAI = [Q1 + Q2 + Q3 + Q4 + (Q5 + Q6)/2] / 5; all six inputs use a 0–10 response scale, with Q6 representing duration according to the approved questionnaire.
Bounded, transparent calculation
03
Result
- Calculate to preview the result.
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Formula, assumptions, and example
Formula: BASDAI = [Q1 + Q2 + Q3 + Q4 + (Q5 + Q6)/2] / 5; all six inputs use a 0–10 response scale, with Q6 representing duration according to the approved questionnaire.
The page gives the first four symptoms equal combined weight and averages the two morning-stiffness questions before dividing by five. It reports a 0–10 symptom score and does not turn it into a diagnosis or treatment decision.
- All six responses refer to the same approved BASDAI recall period and language version.
- Q1–Q5 are entered on the 0–10 symptom scale; Q6 is entered using the questionnaire’s duration anchors.
- The arithmetic is the original six-question BASDAI structure, not ASDAS or another disease-activity index.
- A higher result represents more reported symptom activity in the direction of this index.
- The page does not infer missing answers, replace a paper or electronic questionnaire, or validate the patient’s interpretation of each anchor.
- A score alone does not diagnose axial spondyloarthritis or establish inflammatory activity.
- Clinical decisions should consider examination, history, imaging, laboratory data, function, and treatment context.
- Use the same questionnaire version when monitoring change over time.
Worked example: BASDAI = [2 + 2 + 1 + 1 + (3 + 3)/2] ÷ 5 = 2.20 out of 10.
Displayed input contract
- Q1 — Fatigue or tiredness over the recall period · minimum 0 · maximum 10
- Q2 — Neck, back, or hip pain · minimum 0 · maximum 10
- Q3 — Pain or swelling in other joints · minimum 0 · maximum 10
- Q4 — Tenderness or discomfort to touch/pressure · minimum 0 · maximum 10
- Q5 — Severity of morning stiffness · minimum 0 · maximum 10
- Q6 — Duration of morning stiffness · minimum 0 · maximum 10
The displayed limits are checked before the handler runs. Model-specific domain checks may also reject impossible or non-finite inputs.
Methodology: This calculator follows the WorldCalculate input, formula, precision, and boundary policy. Read the official methodology.
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Answer-first guide
How to use the BASDAI Symptom Score Calculator for a real question
Calculate the six-question BASDAI symptom score from 0–10 responses, showing the first-four sum and the morning-stiffness average separately. Start with one clearly defined goal, enter values in the units shown, and keep the result attached to the assumptions below.
What this answers
This tool is useful when your question includes BASDAI calculator, BASDAI score, ankylosing spondylitis disease activity index. It returns the outputs declared in the calculator contract rather than a live quote, approval, diagnosis, or professional sign-off.
What you enter
Q1 — Fatigue or tiredness over the recall period · Q2 — Neck, back, or hip pain · Q3 — Pain or swelling in other joints · Q4 — Tenderness or discomfort to touch/pressure · Q5 — Severity of morning stiffness · Q6 — Duration of morning stiffness. Keep the same time period, unit system, and currency wherever the form requires comparable values.
How to check it
Run the worked example first, compare its output with the page's example, then change one input at a time. This makes an unexpected result easier to trace to a unit, boundary, or assumption.
Three checks before you rely on the answer
- Match the question. Confirm that the result means the quantity you need, not a similar-sounding percentage, balance, rate, or estimate.
- Match the inputs. Use the requested units and period, and read each hint before replacing the example values with your own.
- Read the boundary. Review the assumptions and limits. All six responses refer to the same approved BASDAI recall period and language version.
Need a wider view? Browse Health Calculators or compare the related tools below. The WorldCalculate methodology explains how formulas, examples, limits, and revisions are reviewed.
How to use the BASDAI Symptom Score Calculator
- Enter Q1 — Fatigue or tiredness over the recall period (0–10 points).
- Enter Q2 — Neck, back, or hip pain (0–10 points).
- Enter Q3 — Pain or swelling in other joints (0–10 points).
- Enter Q4 — Tenderness or discomfort to touch/pressure (0–10 points).
- Enter Q5 — Severity of morning stiffness (0–10 points).
- Enter Q6 — Duration of morning stiffness (0–10 points).
- Choose Calculate and read the result panel.
- Use Download PDF or Download Word to save a result sheet.
Formula
BASDAI = [Q1 + Q2 + Q3 + Q4 + (Q5 + Q6)/2] / 5; all six inputs use a 0–10 response scale, with Q6 representing duration according to the approved questionnaire.
The page gives the first four symptoms equal combined weight and averages the two morning-stiffness questions before dividing by five. It reports a 0–10 symptom score and does not turn it into a diagnosis or treatment decision.
Worked example
BASDAI = [2 + 2 + 1 + 1 + (3 + 3)/2] ÷ 5 = 2.20 out of 10.
Assumptions and limits
- All six responses refer to the same approved BASDAI recall period and language version.
- Q1–Q5 are entered on the 0–10 symptom scale; Q6 is entered using the questionnaire’s duration anchors.
- The arithmetic is the original six-question BASDAI structure, not ASDAS or another disease-activity index.
- A higher result represents more reported symptom activity in the direction of this index.
- The page does not infer missing answers, replace a paper or electronic questionnaire, or validate the patient’s interpretation of each anchor.
- A score alone does not diagnose axial spondyloarthritis or establish inflammatory activity.
- Clinical decisions should consider examination, history, imaging, laboratory data, function, and treatment context.
- Use the same questionnaire version when monitoring change over time.
Who uses this calculator?
- Patients completing a symptom discussion aid with clinical support
- Rheumatology students learning the BASDAI arithmetic
- Clinicians checking the calculation beside a documented questionnaire
When is it useful?
- Calculate the 0–10 BASDAI result from six entered responses.
- Show the separate morning-stiffness average.
- Compare repeated scores when the recall period and questionnaire anchors are unchanged.
Context and background
How health estimates should be read
Health calculators use measurements and population-level relationships to produce screening or planning estimates. They describe the supplied model; they do not diagnose, prescribe, or replace clinical judgment.
Many familiar health formulas began as practical ways to summarize measurements. Their limits matter as much as their output because individual bodies, medications, conditions, and professional standards vary.
Research and review
How this guide was researched
Researched by Hassan ALRowaie, Founder and editorial researcher at WorldCalculate.
This guide follows the live calculator's declared inputs, formula, worked example, assumptions, validation boundaries, and source-backed methodology. The review date describes editorial review of the calculator explanation; it is not a promise that external facts or rates remain current.
BASDAI is a six-question symptom index for ankylosing spondylitis and related axial spondyloarthritis assessment. WorldCalculate makes the weighting visible so the result can be checked and discussed with the clinician who interprets it.
What BASDAI measures
The six questions cover fatigue, spinal pain, peripheral pain or swelling, localized tenderness, and morning stiffness through two questions.
It is a patient-reported symptom index over a defined recall period. It is not a complete clinical examination or a standalone diagnosis.
The six response fields
Questions 1–5 use a 0–10 severity scale. The sixth question represents the duration of morning stiffness using the approved questionnaire’s anchors, which are also represented on a 0–10 scale.
Use the wording and language version supplied by the responsible service. Short labels on a calculator cannot replace the full questionnaire instructions.
How the formula works
First add Q1 through Q4. Then average Q5 and Q6 so morning stiffness contributes one combined domain. Add that average to the first-four sum and divide by five.
This weighting is why simply adding all six values and dividing by six would be a different calculation.
Worked example
For 2, 2, 1, 1, 3, and 3, the first-four sum is 6 and the stiffness average is 3. The result is (6 + 3) ÷ 5 = 1.8.
WorldCalculate retains the unrounded intermediate values and formats the final display so rounding does not change the underlying arithmetic.
Understanding change over time
A repeated score is more interpretable when the same recall period, response anchors, questionnaire version, and clinical context are used.
A change can reflect symptoms, treatment, unrelated illness, recall, or scoring conditions. It should be discussed rather than interpreted in isolation.
Score versus disease activity
BASDAI is a symptom measure. Pain and stiffness can have multiple causes, and the index does not include every objective feature used in clinical assessment.
A clinician may combine BASDAI with examination findings, imaging, laboratory tests, function, and other instruments before making a decision.
Privacy and support
The page does not need a name or medical record number to perform the arithmetic. Avoid entering identifying information into a public form.
If pain, stiffness, weakness, fever, neurologic symptoms, or function is worsening, seek appropriate medical advice rather than waiting for a score.
FAQs
What is the maximum? Ten. Is a result of four a diagnosis? No; thresholds are clinical context and should not be used alone. Can BASDAI replace ASDAS? No; they are different instruments with different inputs and purposes.
Frequently asked questions
What is the BASDAI Symptom Score Calculator?
Calculate the six-question BASDAI symptom score from 0–10 responses, showing the first-four sum and the morning-stiffness average separately.
What is the formula for the BASDAI Symptom Score Calculator?
BASDAI = [Q1 + Q2 + Q3 + Q4 + (Q5 + Q6)/2] / 5; all six inputs use a 0–10 response scale, with Q6 representing duration according to the approved questionnaire. The page gives the first four symptoms equal combined weight and averages the two morning-stiffness questions before dividing by five. It reports a 0–10 symptom score and does not turn it into a diagnosis or treatment decision.
What do I need to use this calculator?
Enter Q1 — Fatigue or tiredness over the recall period, Q2 — Neck, back, or hip pain, Q3 — Pain or swelling in other joints, Q4 — Tenderness or discomfort to touch/pressure, Q5 — Severity of morning stiffness, Q6 — Duration of morning stiffness, then choose Calculate.
What are the limits of this calculator?
All six responses refer to the same approved BASDAI recall period and language version. Q1–Q5 are entered on the 0–10 symptom scale; Q6 is entered using the questionnaire’s duration anchors. The arithmetic is the original six-question BASDAI structure, not ASDAS or another disease-activity index. A higher result represents more reported symptom activity in the direction of this index. The page does not infer missing answers, replace a paper or electronic questionnaire, or validate the patient’s interpretation of each anchor. A score alone does not diagnose axial spondyloarthritis or establish inflammatory activity. Clinical decisions should consider examination, history, imaging, laboratory data, function, and treatment context. Use the same questionnaire version when monitoring change over time.
Methodology
This calculator is part of the WorldCalculate library. Its formula, example, assumptions, input bounds, and output formatting follow the official methodology.
Use this calculator as part of a bigger plan
These WorldCalculate collections connect this tool with related questions while keeping each calculation separate and transparent.