Evidence map›Paper›PMID 9539993›Full record

ArticleDiabetes care1998

Biological variation of glycated hemoglobin. Implications for diabetes screening and monitoring.

E S Kilpatrick, P W Maylor, B G Keevil

Abstract read
PubMed Publisher
In one paragraph

Article in Diabetes care, 1998. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 38 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
38citing papers in PubMed, 1 pooled it
2.6field-weighted citation impact, top 11% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

38 citing papers in PubMed, 1 synthesis or guideline pooled it, 135 citations in OpenAlex.

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  8. Microfluidic-based systems for the management of diabetes.Drug delivery and translational research · 2024
    Review
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4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

3 authors at 1 institution in 1 country.

E S KilpatrickDepartment of Chemical Pathology, South Manchester Hospitals University NHS Trust, U.K.
P W Maylor
B G Keevil
Manchester University NHS Foundation Trust · GB

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

objectiveTo assess the inherent potential of glycated hemoglobin as a screening test for type 2 diabetes by determining the biological variation in nondiabetic subjects. RESEARCH DESIGN AND

methodsHbA1c values were measured by high-performance liquid chromatography (HPLC) in 12 nondiabetic subjects (7 men and 5 women; median age, 40 years [range, 21-55 years]) on 10 fortnightly occasions. The nondiabetic index of individuality (IOI) for HbA1c (i.e., the square root of the ratio of intra- to interindividual variance) was determined. Any test with an IOI of 1.4 has the most potential in disease screening, while one of 0.6 will be of little value.

resultsThe analytical variance contributed to 9% of the total test variance, intraindividual variance, 6%; and interindividual variance, 85%. The IOI was, therefore, only 0.27. Thus, nondiabetic HbA1c values vary markedly between subjects, while values in the same individual change little with time. As such, to lie outside the assay reference range, the HbA1c values of some nondiabetic subjects must exceed 12 SD from their usual mean value, while in others a change of only 2 SD would be sufficient.

conclusionsThis fundamental characteristic of HbA1c means that even if analytical methods improve, glycated hemoglobin measurements will always be of limited value when screening for type 2 diabetes. If similar interindividual differences also exist in diabetic subjects, then patients with the same glycemic control may vary by at least 1-2%, which has implications in setting glycated hemoglobin targets.

Indexed as

AdultAnalysis of VarianceBiomarkersBlood GlucoseBlood Glucose Self-MonitoringDiabetes MellitusFastingFemaleGlycated HemoglobinHumansMaleMass ScreeningMiddle AgedObserver VariationReference ValuesBiomarkersBlood GlucoseGlycated Hemoglobin

Identifiers

PMID9539993
OpenAlexW1979347922

What OpenQuestion holds

Textmetadata
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.