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the claim

Fasting blood glucose tests accurately diagnose prediabetes

the verdict
CONTESTED
contested - evenly split
Recorded sources
3 sources for · 3 against

Counts group repeated records of the same source within each side. They do not measure evidence strength or source independence.

Is it true that fasting blood glucose tests accurately diagnose prediabetes?

Partly. The claim that fasting blood glucose tests accurately diagnose prediabetes is contested, as studies show that while they correlate with other tests, they often miss a substantial number of cases and show low concordance compared to oral glucose tolerance or multi-marker approaches.

Verdict: CONTESTED · 3 sources for, 3 against · Last checked

The analysis

The retrieved literature contains conflicting evidence regarding the diagnostic accuracy of fasting blood glucose (FPG) for prediabetes. While studies like paper 1, 7, and 10 show that FPG has reasonable sensitivity or concordance with other markers, papers 2, 5, and 7 explicitly point out poor concordance, missed cases, and underdiagnosis of prediabetes when relying on FPG alone, making the verdict CONTESTED.

The evidence we hold leans evenly split

How this was weighed

official record 3x · fact-check 2x · hedged 1x · crowd & reference 1x

  • Comparison of Hemoglobin A1c with Fasting and 2-h Plasma Glu · peer-reviewed · supports · weight 1.3 · 2018
  • Discrepancy in diagnoses of diabetes and prediabetes using f · peer-reviewed · supports · weight 1.05 · 2023
  • Concordance and Associated Factors in Diagnostic Criteria fo · peer-reviewed · supports · weight 1.05 · 2024
  • Criteria for prediabetes and posttransplant diabetes mellitu · peer-reviewed · refutes · weight 1.3 · 2022
  • Metabolite Triplet in Serum Improves the Diagnostic Accuracy · peer-reviewed · refutes · weight 1.05 · 2020
  • Discrepancy in diagnoses of diabetes and prediabetes using f · peer-reviewed · refutes · weight 1.05 · 2023
Evidence for · 3
Comparison of Hemoglobin A1c with Fasting and 2-h Plasma Glucose Tests for Diagnosis of Diabetes and Prediabetes among High-risk South Indians
2018
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Radhakrishna, P., Vinod, K., Sujiv, A., & Swaminathan, R. (2018). Comparison of Hemoglobin A1c with Fasting and 2-h Plasma Glucose Tests for Diagnosis of Diabetes and Prediabetes among High-risk South Indians. doi.org. https://doi.org/10.4103/ijem.IJEM_254_17

Evidence against · 3
Criteria for prediabetes and posttransplant diabetes mellitus after kidney transplantation: A 2‐year diagnostic accuracy study of participants from a randomized controlled trial
2022
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Kurnikowski, A., Nordheim, E., Schwaiger, E., Krenn, S., Harreiter, J., Kautzky-Willer, A., Leutner, M., Werzowa, J., Tura, A., Budde, K., Eller, K., Pascual, J., Krebs, M., Jenssen, T., & Hecking, M. (2022). Criteria for prediabetes and posttransplant diabetes mellitus after kidney transplantation: A 2‐year diagnostic accuracy study of participants from a randomized controlled trial. doi.org. https://doi.org/10.1111/ajt.17187

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More for · 2
Discrepancy in diagnoses of diabetes and prediabetes using fasting plasma glucose and glycosylated hemoglobin and the underdiagnosis by ICD-10 coding: data from a tertiary hospital in Thailand
2023
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Poorirerngpoom, N., Ganokroj, P., Vorayingyong, A., Rattananupong, T., Pusavat, J., & Supasiri, T. (2023). Discrepancy in diagnoses of diabetes and prediabetes using fasting plasma glucose and glycosylated hemoglobin and the underdiagnosis by ICD-10 coding: data from a tertiary hospital in Thailand. doi.org. https://doi.org/10.3389/fpubh.2023.1322480

Concordance and Associated Factors in Diagnostic Criteria for Prediabetes and Diabetes: An Analysis of Fasting Glucose, Postprandial Glucose, and Glycated Hemoglobin
2024
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Vera-Ponce, V., Zuzunaga-Montoya, F. E., Loayza-Castro, J. A., Vásquez-Romero, L., Paucar, C. R. I., Valladares-Garrido, M. J., Ramos, W., Ponce, N. R. G., & Cruz-Vargas, J. A. D. L. (2024). Concordance and Associated Factors in Diagnostic Criteria for Prediabetes and Diabetes: An Analysis of Fasting Glucose, Postprandial Glucose, and Glycated Hemoglobin. doi.org. https://doi.org/10.14740/jem919

More against · 2
Metabolite Triplet in Serum Improves the Diagnostic Accuracy of Prediabetes and Diabetes Screening.
2020
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Wang, L., Zhang, Y., Liu, X., Zhao, X., Yang, O., Qiu, G., Lv, W., Zheng, F., Wang, Q., Lu, X., Peng, X., Wu, T., Lehmann, R., Wang, C., Jia, W., & Xu, G. (2020). Metabolite Triplet in Serum Improves the Diagnostic Accuracy of Prediabetes and Diabetes Screening.. doi.org. https://doi.org/10.1021/acs.jproteome.0c00786

Discrepancy in diagnoses of diabetes and prediabetes using fasting plasma glucose and glycosylated hemoglobin and the underdiagnosis by ICD-10 coding: data from a tertiary hospital in Thailand
2023
Get citation
Poorirerngpoom, N., Ganokroj, P., Vorayingyong, A., Rattananupong, T., Pusavat, J., & Supasiri, T. (2023). Discrepancy in diagnoses of diabetes and prediabetes using fasting plasma glucose and glycosylated hemoglobin and the underdiagnosis by ICD-10 coding: data from a tertiary hospital in Thailand. doi.org. https://doi.org/10.3389/fpubh.2023.1322480

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Receipt History
first checked04 Aug 2026
judged → CONTESTED · 2504 Aug 2026
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