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At-home A1C tests can provide a general indication of a person's average blood sugar levels over the past two to three months. However, they may not be as accurate as tests conducted in a clinical setting. Factors such as improper sample collection, storage, and handling can affect the results. It is recommended to use these tests as a supplementary tool and to consult with a healthcare provider for more accurate and comprehensive testing.

Several factors can affect the accuracy of an A1C test. These include:1. Hemoglobin Variants: Conditions like sickle cell anemia or thalassemia can interfere with the test results.2. Recent Blood Loss or Transfusion: These can alter the lifespan of red blood cells, affecting the A1C level.3. Iron Deficiency Anemia: This can lead to falsely elevated A1C levels.4. Kidney Disease: It can affect red blood cell turnover, impacting the test.5. Liver Disease: This can also alter red blood cell lifespan and affect results.6. Certain Medications: Some drugs can impact blood glucose levels or red blood cell turnover.It's important for individuals to discuss any underlying conditions or medications with their healthcare provider to ensure accurate interpretation of A1C results.