Masafumi Koga

Japan

Last Updated: 09/26/2026

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Found 98 publications

The HbA1c-Adjusted Slow Valley Height Ratio, a Depth Indicator of the Valley Between HbA1c and HbA0 Measured by High-Performance Liquid Chromatography, Is Useful for the Diagnosis of Hb Toranomon.

The HbA1c-Adjusted Slow Valley Height Ratio, a Depth Indicator of the Valley Between HbA1c and HbA0 Measured by High-Performance Liquid Chromatography, Is Useful for the Diagnosis of Hb Toranomon.

Journal: Annals of clinical and laboratory science

Published: March 15, 2025

Falsely Elevated HbA1c Levels in a Patient with Type 2 Diabetes Mellitus and Multiple Beta Globulin Gene Mutations.

Falsely Elevated HbA1c Levels in a Patient with Type 2 Diabetes Mellitus and Multiple Beta Globulin Gene Mutations.

Journal: Annals of clinical and laboratory science

Published: January 24, 2025

A Case of Hb Phnom Penh Showing Different HbA1c Levels Depending on the High-Performance Liquid Chromatography System.

A Case of Hb Phnom Penh Showing Different HbA1c Levels Depending on the High-Performance Liquid Chromatography System.

Journal: Annals of clinical and laboratory science

Published: November 13, 2024

Elevation of erythrocyte creatine post-puberty unrelated to erythrocyte lifespan: Implications from the lack of correlation between HbA1c and erythrocyte creatine.

Elevation of erythrocyte creatine post-puberty unrelated to erythrocyte lifespan: Implications from the lack of correlation between HbA1c and erythrocyte creatine.

Journal: Clinica chimica acta; international journal of clinical chemistry

Published: July 22, 2024

Blood cell HbA1c measured by enzymatic assay show higher than whole blood HbA1c in patients with iron deficiency anemia.

Blood cell HbA1c measured by enzymatic assay show higher than whole blood HbA1c in patients with iron deficiency anemia.

Journal: Diabetology international

Published: June 14, 2024

Analysis of five cases showing false-high Hemoglobin A1c due to reduced catalase activity.

Analysis of five cases showing false-high Hemoglobin A1c due to reduced catalase activity.

Journal: Endocrine journal

Published: November 29, 2023

Establishment of a reference interval for glycated albumin based on medical check-up data from multiple medical institutions.

Establishment of a reference interval for glycated albumin based on medical check-up data from multiple medical institutions.

Journal: Scandinavian journal of clinical and laboratory investigation

Published: September 18, 2023

Two patients with α-chain hemoglobin variant Hb Q-Iran detected by measuring hemoglobin A1c using the variant mode of the HA-8180V HPLC analyzer.

Two patients with α-chain hemoglobin variant Hb Q-Iran detected by measuring hemoglobin A1c using the variant mode of the HA-8180V HPLC analyzer.

Journal: Diabetology international

Published: August 16, 2023

(GγAγδβ)0$({}^{\rm G}{\gamma}{}^{\rm A}{\gamma}\delta\beta)^0$

(GγAγδβ)0$({}^{\rm G}{\gamma}{}^{\rm A}{\gamma}\delta\beta)^0$

Journal: Pediatric blood & cancer

Published: June 05, 2023

Usefulness of HbA1c Measurements by HPLC- and Immuno-Assay for Screening Unstable Hemoglobinopathy.

Usefulness of HbA1c Measurements by HPLC- and Immuno-Assay for Screening Unstable Hemoglobinopathy.

Journal: Annals of clinical and laboratory science

Published: March 08, 2023

Estimation of mean erythrocyte age using HbA1c or HbA1c/glycated albumin for evaluation of anemia severity.

Estimation of mean erythrocyte age using HbA1c or HbA1c/glycated albumin for evaluation of anemia severity.

Journal: Journal of clinical laboratory analysis

Published: October 05, 2022

A case of a novel hemoglobin variant, Hb A2-Karatsu, discovered following a falsely elevated HbA1c value.

A case of a novel hemoglobin variant, Hb A2-Karatsu, discovered following a falsely elevated HbA1c value.

Journal: Clinica chimica acta; international journal of clinical chemistry

Published: September 22, 2022

Showing 1-12 of 98

Last Updated: 09/26/2026