scholarly journals Comparison of the Current Diagnostic Criterion of HbA1c with Fasting and 2-Hour Plasma Glucose Concentration

2016 ◽  
Vol 2016 ◽  
pp. 1-11 ◽  
Author(s):  
Rudruidee Karnchanasorn ◽  
Jean Huang ◽  
Horng-Yih Ou ◽  
Wei Feng ◽  
Lee-Ming Chuang ◽  
...  
Keyword(s):  
Plasma Glucose ◽  
Clinical Setting ◽  
Fasting Plasma Glucose ◽  
Glucose Concentration ◽  
Hemoglobin A1c ◽  
Plasma Glucose Concentration ◽  
Diabetic Patients ◽  
Diagnostic Agreement ◽  
Current Diagnostic Criterion ◽  
Diagnostic Criterion

To determine the effectiveness of hemoglobin A1c (HbA1c) ≥ 6.5% in diagnosing diabetes compared to fasting plasma glucose (FPG) ≥ 126 mg/dL and 2-hour plasma glucose (2hPG) ≥ 200 mg/dL in a previously undiagnosed diabetic cohort, we included 5,764 adult subjects without established diabetes for whom HbA1c, FPG, 2hPG, and BMI measurements were collected. Compared to the FPG criterion, the sensitivity of HbA1c ≥ 6.5% was only 43.3% (106 subjects). Compared to the 2hPG criterion, the sensitivity of HbA1c ≥ 6.5% was only 28.1% (110 subjects). Patients who were diabetic using 2hPG criterion but had HbA1c < 6.5% were more likely to be older (64±15versus60±15years old,P=0.01, mean ± STD), female (53.2% versus 38.2%,P=0.008), leaner (29.7±6.1versus33.0±6.6 kg/m2,P=0.000005), and less likely to be current smokers (18.1% versus 29.1%,P=0.02) as compared to those with HbA1c ≥ 6.5%. The diagnostic agreement in the clinical setting revealed the current HbA1c ≥ 6.5% is less likely to detect diabetes than those defined by FPG and 2hPG. HbA1c ≥ 6.5% detects less than 50% of diabetic patients defined by FPG and less than 30% of diabetic patients defined by 2hPG. When the diagnosis of diabetes is in doubt by HbA1c, FPG and/or 2hPG should be obtained.

scholarly journals Comparative Study of Fasting Plasma Glucose Concentration and Glucose Challenge Test for Screening Gestational Diabetes Mellitus

2014 ◽  
Vol 6 (2) ◽  
pp. 75-78
Author(s):  
Sujaya Sham ◽  
B Poornima R Bhat ◽  
Aruna Kamath
Keyword(s):  
Diabetes Mellitus ◽  
Plasma Glucose ◽  
Fasting Plasma Glucose ◽  
Glucose Concentration ◽  
Challenge Test ◽  
Plasma Glucose Concentration ◽  
Fasting Plasma ◽  
Glucose Challenge Test ◽  
Glucose Challenge ◽  
Fasting Plasma Glucose Concentration

ABSTRACT Background To compare the sensitivity and specificity of fasting plasma glucose (FPG) with that of standard glucose challenge test (GCT). Materials and methods Eighty-nine eligible pregnant women underwent GCT between 24th and 28th gestational week, followed by a diagnostic 3 hours 100 gm oral glucose tolerance test within 1 week. Out patient clinic in Father Muller Medical College Hospital, Mangalore. Data was analyzed for significance by chi-square test. Results Fasting plasma glucose concentration at a threshold value of 90 mg/dl and GCT at recommended standard threshold of 140 mg/dl yielded sensitivities of 66.7% and 100% respectively and specificities of 87.3% and 46.5% respectively. Reducing the threshold value of FPG to 80 mg/dl increased the sensitivity of test to 91.7% with specificity of 54.9% which was comparable to standard GCT, in our study. Conclusion Measuring FPG concentration using a cut-off of. 80 mg/dl is an easier, tolerable and more cost effective procedure than GCT for detecting more severe cases of GDM, i.e. the diabetes mellitus group. In resource poor settings with population belonging to average risk or high risk category, FPG at a cut-off of 90 mg/dl can be used to screen GDM. How to cite this article Sham S, Bhat BPR, Kamath A. Comparative Study of Fasting Plasma Glucose Concentration and Glucose Challenge Test for Screening Gestational Diabetes Mellitus. J South Asian Feder Obst Gynae 2014;6(2):75-78.

scholarly journals Effect of Sample Volume Variation and Delay in Analysis on Plasma Glucose Concentration in Sri Lankan Healthy Adults

Scientifica ◽  
2021 ◽  
Vol 2021 ◽  
pp. 1-5
Author(s):  
Isuru Anupama Dharmasena ◽  
Deepani Siriwardhana ◽  
Anoja Priyadarshani Attanayake
Keyword(s):  
Plasma Glucose ◽  
Fasting Plasma Glucose ◽  
Glucose Concentration ◽  
Sample Volume ◽  
Healthy Adults ◽  
Plasma Glucose Concentration ◽  
Volume Variation ◽  
Fasting Plasma ◽  
Dependent Change ◽  
The Mean

The correct volume of sample and time of storing prior to the analysis are important considerations in the estimation of plasma glucose concentration of patients. The present study was to determine the effect of sample volume variation and time delay in the analysis of plasma glucose results in healthy adults. A total of 30 individuals aged between 20 and 30 years were selected for the study. Blood samples were collected into three fluoride-oxalate collection tubes separately. The results revealed that the sample volume variation from 2.0 mL fluoride-oxalate tube to 1.0 mL and 3.0 mL did not significantly affect the plasma glucose concentration ( p  > 0.05). However, the plasma glucose concentration in the sample significantly decreased upon delaying the analysis. The mean fasting plasma glucose concentration of analysis after one hour of collection and analysis after three hours of collection was not significantly different ( p  > 0.05). The mean fasting plasma glucose concentrations between one hour and five hours timepoints after collection ( p  < 0.001) and between three hours and five hours after collection ( p  = 0.014) were significantly different. In conclusion, overfilling and underfilling (2.0 ± 1.0 mL) of fluoride-oxalate tubes did not affect the plasma glucose results significantly. If the samples are analyzed within three hours of collection, the time dependent change too is not statistically significant.

Sign in / Sign up

Export Citation Format

Share Document