Results

Results from your hematocrit test are reported as the percentage of blood cells that are red blood cells. Normal ranges vary substantially with race, age and sex. The definition of normal red-blood cell percentage also varies from one medical practice to another.

Generally, a normal range is considered to be:

• For men, 38.3 to 48.6 percent
• For women, 35.5 to 44.9 percent

For children ages 17 and younger, the normal range varies by age and sex.

Your hematocrit test provides just one piece of information about your health. Talk to your doctor about what your hematocrit test result means in light of the symptoms you're experiencing and the results of other diagnostic tests.

Accuracy of test results

A number of factors can affect the outcome of a hematocrit test and yield inaccurate or misleading results, including:

• Living at a high altitude
• Pregnancy
• Significant recent blood loss
• Recent blood transfusion
• Severe dehydration

Your doctor will take into account possible complicating factors when interpreting the results of your hematocrit test. Your doctor may want to repeat the hematocrit test and do other blood tests if results provide conflicting or unexpected information.