Which of the following results would indicate dehydration?

High levels of hemoglobin indicate dehydration because as the body loses water, the concentration of hemoglobin in the blood can increase. Dehydration causes a reduction in plasma volume while the amount of hemoglobin remains relatively constant, leading to a higher concentration of hemoglobin per volume of blood.

In a dehydrated state, the body attempts to maintain adequate circulation and oxygen transport, resulting in elevated hemoglobin levels. This serves as a physiological response to maintain functions despite the reduced fluid state. High hematocrit values, another indicator of dehydration, reflect the ratio of red blood cells to plasma volume, further emphasizing the link between elevated hemoglobin and the body's response to reduced fluid levels.

Other options like low hemoglobin or a normal red blood cell count do not accurately reflect dehydration; they may suggest other medical conditions or fluid overload rather than a true indication of dehydration.