What is the normal reference value for hematocrit as a percentage?

The normal reference range for hematocrit, which measures the proportion of blood volume that is made up of red blood cells, typically falls between 37% and 50%. This range is considered standard for most health assessments in adults.

Hematocrit levels within this range indicate adequate oxygen-carrying capacity and hydration status. Values below this range may suggest anemia or other chronic conditions, while values above can indicate polycythemia or dehydration. In geriatric patients, maintaining appropriate hematocrit levels is particularly important, as variations can significantly affect overall health, mobility, and the ability to perform daily activities.

The other options do not represent typical normal ranges for hematocrit, as they are outside the accepted values based on clinical reference standards for adults. Thus, option B effectively encapsulates the expected hematocrit percentage.