What measurement is useful for detecting iron deficiency in its earliest stage?
A) Hematocrit
B) Serum iron level
C) Red blood cell count
D) Serum ferritin
E) Transferrin saturation

Question

What measurement is useful for detecting iron deficiency in its earliest stage? 
A) Hematocrit 
B) Serum iron level 
C) Red blood cell count 
D) Serum ferritin 
E) Transferrin saturation

Quizplus · Accepted Answer

Serum ferritin is the best measurement for detecting iron deficiency in its earliest stage as it reflects the amount of iron stored in the body. A low level of serum ferritin indicates decreased iron stores and therefore an early stage of iron deficiency. Hematocrit, serum iron level, red blood cell count, and transferrin saturation are all useful in diagnosing iron deficiency, but they do not detect the earliest stage as accurately as serum ferritin.

What Measurement Is Useful for Detecting Iron Deficiency in Its