If a patient is in stage 3a kidney disease, what GFR value would be observed?

In stage 3a chronic kidney disease (CKD), the glomerular filtration rate (GFR) typically ranges from 45 to 59 mL/min/1.73m². The value that would be observed in stage 3a kidney disease would be indicative of a moderate decrease in kidney function.

While B suggests a GFR of 42 mL/min/1.73m², which is at the lower end of the range for stage 3a, it reflects a stage of kidney disease that shows significant impairment, but is still classified within the spectrum of stage 3. The GFR values in this stage indicate that the kidneys are not filtering blood as effectively as they should, highlighting the importance of monitoring kidney function as CKD progresses.

The other choices reflect GFR values outside of the range associated with stage 3a kidney disease; thus, they do not accurately represent the degree of kidney dysfunction typical for this stage.