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Paroxysmal Nocturnal Hemoglobinuria Quiz

Paroxysmal Nocturnal Hemoglobinuria Quiz - FreudlyTake a free paroxysmal nocturnal hemoglobinuria quiz to explore your paroxysmal nocturnal hemoglobinuria. Quick, no sign-up needed. Start now!en
Clarify possible PNH-related symptoms, clot warning signs, and blood test history in about 10 minutes. Free and no sign-up, it helps you prepare a focused conversation with your clinician.
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Questions: 1510 minutes
08:30
July 22, 2026
July 22, 2026
Material has been updated
July 22, 2026
Material has been published
2,693 views
254 completions
222 likes
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Scale Explorer

How the Scales are Structured

example score
5/15
Blood Count and PNH Testing Context (BCaPTC)
This scale summarizes reported blood-count findings and prior PNH-related testing context that may be relevant to discuss with a clinician.
No known indicators
Context to review
Prompt follow-up warranted
0: No known indicators | 1 – 2: Context to review | 3 – 15: Prompt follow-up warranted
A score of 5 falls in the “Prompt follow-up warranted” range, indicating you selected multiple items suggesting prior blood-count or testing context that may merit timely clinical review.
example score
6/15
Clot and Emergency Warning Signs (CaEWS)
Summarizes endorsement of clot-related and emergency warning-sign patterns that may warrant urgent clinical attention.
No indicators endorsed
Medical review appropriate
Prompt action warranted
0: No indicators endorsed | 1 – 2: Medical review appropriate | 3 – 15: Prompt action warranted
A score of 6 falls in the “Prompt action warranted” range, indicating multiple endorsed warning signs where any single concerning experience is important regardless of the total.
example score
10/15
Hemolysis and Anemia-Related Changes (HaARC)
This scale summarizes self-reported changes that can be consistent with hemolysis and anemia-related effects (e.g., fatigue, dark urine, low hemoglobin history).
No indicators endorsed
Worth discussing
Prompt action warranted
0: No indicators endorsed | 1 – 2: Worth discussing | 3 – 15: Prompt action warranted
A score of 10 falls in the “Prompt action warranted” range, indicating multiple hemolysis/anemia-related changes were endorsed and may be important to discuss promptly in a clinical context.
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DATA-BASED USER COHORTS

Who Usually Takes This Test?

Unexplained anemia symptoms
41%OF USERS
People with ongoing fatigue, pale skin, shortness of breath, or dark urine who want to see whether their symptom pattern could be worth discussing with a clinician.
Clot concern after warning signs
34%OF USERS
People who have had a blood clot, unusual abdominal or chest pain episodes, or other clot warning signs and want to organize what happened before talking to a healthcare professional.
Abnormal blood test history
25%OF USERS
People with persistent abnormal CBC results like low hemoglobin, low platelets, or low white cells who want to gather details to bring to a medical appointment.
BASED ON AGGREGATED, ANONYMIZED DATA FROM TENS OF THOUSANDS OF FREUDLY USERS.
Benchmarking

See How You Compare

Once you complete the test, your results are compared with real-world data from people in your country.
Below is a preview of how scores are typically distributed across each scale.
Blood Count and PNH Testing Context (BCaPTC)
Blood Count and PNH Testing Context (BCaPTC)
Average
6.9
Normal range
4.2 — 9.5
min.
0
max.
15
This curve shows how scores are typically distributed.
Once you complete the test, your result will appear on the scale so you can see how you compare.
Clot and Emergency Warning Signs (CaEWS)
Clot and Emergency Warning Signs (CaEWS)
Average
6.4
Normal range
3.8 — 8.9
min.
0
max.
15
This curve shows how scores are typically distributed.
Once you complete the test, your result will appear on the scale so you can see how you compare.
Hemolysis and Anemia-Related Changes (HaAC)
Hemolysis and Anemia-Related Changes (HaAC)
Average
9.8
Normal range
7.3 — 12.3
min.
0
max.
15
This curve shows how scores are typically distributed.
Once you complete the test, your result will appear on the scale so you can see how you compare.
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SAMPLE QUESTIONS

Example Questions From the Test

    • My tested results have not shown hemolysis.
    • One result was borderline or temporarily abnormal, without a continuing pattern.
    • Repeated results have suggested hemolysis, such as abnormal LDH, bilirubin, haptoglobin, or reticulocytes.
    • A clinician identified active intravascular hemolysis requiring prompt investigation, monitoring, or treatment.
    • I have not been diagnosed with or evaluated for a bone-marrow failure disorder.
    • A clinician considered a marrow problem, but no such disorder was diagnosed.
    • I have a diagnosed marrow condition other than aplastic anemia, such as a myelodysplastic disorder.
    • I have been diagnosed with aplastic anemia or another significant bone-marrow failure syndrome.
    • None of these chest or breathing experiences.
    • Brief mild discomfort or breathlessness that settled promptly and has not returned.
    • Recurring breathlessness or sharp chest discomfort, particularly when taking a breath.
    • Sudden chest pain, severe breathing difficulty, coughing blood, blue lips, or fainting.
These are 3 of the 15 real questions — the rest appear in the test. No sign-up needed to start.
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WHAT THE TEST MEASURES
About This Assessment

Paroxysmal Nocturnal Hemoglobinuria Quiz - Symptoms and Signs

This free, no-sign-up PNH self-check helps you organize symptoms, clot warning signs, and blood-test history that may be worth discussing with a clinician. It cannot diagnose or rule out paroxysmal nocturnal hemoglobinuria; many listed experiences have other causes, and PNH requires medical evaluation and specialized blood testing. Seek emergency help now for sudden chest pain, severe trouble breathing, coughing blood, fainting, stroke-like symptoms, or sudden painful limb swelling.

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