What is the normal reference range for hematocrit in adult males?

What is the normal reference range for hematocrit in adult males?

• A. 40-50%
• B. 44-54%
• C. 36-46%
• D. 42-52%

Answer: (D)

Hematocrit is the proportion of blood volume made up by red blood cells. For adult males, the normal range is typically about 42% to 52%. This reflects the higher red cell mass commonly seen in men, influenced by androgens that stimulate red blood cell production. Values within this span are considered normal for most adults; lower values may indicate anemia or fluid overload, while higher values can suggest polycythemia or dehydration, depending on the clinical context and lab methods. The range 36-46% is typical for females, not males. A range like 40-50% or 44-54% is not the standard male reference and may misclassify some individuals. Therefore, the normal reference range for adult males is 42-52%.

Hematocrit is the proportion of blood volume made up by red blood cells. For adult males, the normal range is typically about 42% to 52%. This reflects the higher red cell mass commonly seen in men, influenced by androgens that stimulate red blood cell production. Values within this span are considered normal for most adults; lower values may indicate anemia or fluid overload, while higher values can suggest polycythemia or dehydration, depending on the clinical context and lab methods.

The range 36-46% is typical for females, not males. A range like 40-50% or 44-54% is not the standard male reference and may misclassify some individuals. Therefore, the normal reference range for adult males is 42-52%.