Journal of Diabetes Research / 2020 / Article / Tab 3

Research Article

Diagnosis of Gestational Diabetes Mellitus with Point-of-Care Methods for Glucose versus Hospital Laboratory Method Using Isotope Dilution Gas Chromatography-Mass Spectrometry as Reference

Table 3

Summary of modified Bland-Altman comparison.

Valid samples ()Bias (%)MARD (%)aCV (%)b95% limits of agreement
LowercUpperd

HC201+
 Fasting1354.36.36.5–7.616.5
 1 h504.95.85.2–3.714.6
 2 h1323.55.15.6–6.713.4
 Overall3174.25.86.0−7.615.9
HC201RT
 Fasting135–1.85.16.1–12.29.4
 1 h500.33.44.3–6.58.3
 2 h132–2.74.85.2–12.16.7
 Overall317−1.84.75.6−12.89.2
CL
 Fasting1345.96.03.80.013.0
 1 h518.18.24.30.714.8
 2 h1325.76.04.3–0.915.1
 Overall3176.16.34.2−2.114.3

Modified Bland-Altman analysis comparing the difference (glucose value obtained by each method–reference value) with the reference value. The bias is the mean relative difference as a percentage of the reference value. A bias of 5% means that the value is on average 5% higher than the reference value. aMean absolute relative difference as a percentage of the reference value. bStandard deviation of the bias. cLower 95% limits of agreement define bias −1.96 CV. dUpper 95% limits of agreement define bias +1.96 CV. CL: central laboratory; CV: coefficient of variation; HC201+: HemoCue 201+; HC201RT: HemoCue 201 RT; MARD: mean absolute relative difference.

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