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Also reported in: fraction
Your HbA percentage is within the normal range, indicating the expected proportion of adult hemoglobin in your blood.
A critically low HbA percentage indicates that a large proportion of your hemoglobin is a different type — most commonly hemoglobin S in sickle cell disease, or elevated A2/F in thalassemia. This significantly affects oxygen delivery.
Seek urgent hematology evaluation. The specific abnormal hemoglobin and its clinical implications need to be determined.
HbA: {{value}}% — critically low (ref: {{low}}%–{{high}}%)A low HbA percentage means other hemoglobins (A2, F, or abnormal variants like S, C) are occupying more than the usual proportion. This is seen in thalassemia traits and sickle cell syndromes.
Discuss with your doctor. The pattern of other fractions determines the specific diagnosis.
HbA: {{value}}% — below reference range (ref: {{low}}%–{{high}}%)A borderline low HbA suggests a very mild increase in HbA2, HbF, or an abnormal hemoglobin. This pattern is often seen in silent or very mild thalassemia traits.
Usually benign. Discuss with your doctor if you have anemia or a family history of hemoglobin disorders.
HbA: {{value}}% — borderline lowYour HbA percentage is within the normal range, indicating the expected proportion of adult hemoglobin in your blood.
No action needed.
HbA: {{value}}% — within reference rangeYour HbA percentage is in the optimal range with appropriate levels of other hemoglobins.
No action needed.
HbA: {{value}}% — optimalA borderline high HbA may simply reflect slightly lower HbA2 and HbF levels, which can be a normal variant.
No action needed.
HbA: {{value}}% — borderline highElevated HbA simply means the other fractions are slightly lower. In isolation, an elevated HbA is not clinically significant.
No action needed.
HbA: {{value}}% — above reference range (ref: {{low}}%–{{high}}%)An very high HbA percentage likely reflects very low levels of other fractions and is usually a calculation artifact rather than a pathological finding.
No action needed. This is not a clinical concern.
HbA: {{value}}% — critically highUpload your lab report and get your actual values interpreted in plain English — instantly, with no medical training required.