Laboratory studies indicate a client's blood glucose level is 185 mg/dl. Two hours have passed since the client ate breakfast. Which test would yield the most conclusive diagnostic information about the client's glucose use?

Random blood glucose test must have shown this level.

Fasting blood glucose needs to be checked with A1C

Explanation:

Normal values fpr prediabeteics for different tests are

                                          Normal              prediabetic          diabetic

1. A1C (%)                              < 5.7                  5.7 to 6.4              > 6.6

2. fasting plasma glucose   < 100                 100 to 125             >125

     FPG (mg/dl)                                  

3. OGTT  (mg/dl)                  <140                  140 to 199             > 200

(2 hr blood sugar)        

OGTT = oral glucose tolerance test

A1C = glycated haemoglobin

Further explanation

fasting plasma glucose is recommended as it helps in diagnosing A1C measures average blood sugar for 2 to 3 months as it is tells about how well body has control of blood sugar