Prediabetes Identification Using Lab Values

To determine if a patient is prediabetic, specific ranges for Fasting Plasma Glucose (FPG) and Hemoglobin A1c (HbA1c) tests are used. Prediabetes is indicated if either test result falls within the prediabetes range.

Prediabetes Diagnostic Criteria:

• Fasting Plasma Glucose (FPG): $100 \text{ mg/dL}$ to $125 \text{ mg/dL}$
• Hemoglobin A1c (HbA1c): $5.7\%$ to $6.4\%$

Analysis of Options:

Let's evaluate each option based on these criteria:

• Option 1:
  HbA1c $5.6\%$, FPG $126 \text{ mg/dL}$
  • HbA1c $5.6\%$ is normal (below $5.7\%$).
  • FPG $126 \text{ mg/dL}$ meets the threshold for diabetes (≥ $126 \text{ mg/dL}$).
  • This suggests diabetes, not prediabetes.
• Option 2:
  HbA1c $6\%$ (corrected to $6.0\%$), FPG $130 \text{ mg/dL}$
  • HbA1c $6.0\%$ falls within the prediabetes range ($5.7\% - 6.4\%$).
  • FPG $130 \text{ mg/dL}$ meets the threshold for diabetes (≥ $126 \text{ mg/dL}$).
  • Since the FPG indicates diabetes, this option suggests diabetes.
• Option 3:
  HbA1c $6.2\%$, FPG $105 \text{ mg/dL}$
  • HbA1c $6.2\%$ falls within the prediabetes range ($5.7\% - 6.4\%$).
  • FPG $105 \text{ mg/dL}$ falls within the prediabetes range ($100 \text{ mg/dL} - 125 \text{ mg/dL}$).
  • Both values indicate prediabetes.
• Option 4:
  HbA1c $6.6\%$, FPG $115 \text{ mg/dL}$
  • HbA1c $6.6\%$ meets the threshold for diabetes (≥ $6.5\%$).
  • FPG $115 \text{ mg/dL}$ falls within the prediabetes range ($100 \text{ mg/dL} - 125 \text{ mg/dL}$).
  • Since the HbA1c indicates diabetes, this option suggests diabetes.

Conclusion

Option 3 is the only one where both lab values fall within the established ranges for prediabetes, clearly suggesting the patient is prediabetic.