Evidence map›Paper›PMID 20144437›Full record

ArticleJournal of diabetes science and technology2009

Measurement of glycated hemoglobin A1c from dried blood by turbidimetric immunoassay.

Ramakrishnan Lakshmy, Ruby Gupta

Open access · bronzeAbstract readComparative Study
In one paragraph

Article in Journal of diabetes science and technology, 2009. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 19 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
19citing papers in PubMed, 1 pooled it
0.4field-weighted citation impact, top 35% 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

19 citing papers in PubMed, 1 synthesis or guideline pooled it, 40 citations in OpenAlex.

  1. Dried Blood Spots to Assess Cardiovascular-Kidney-Metabolic Health.Journal of the American Heart Association · 2025
    Pooled it
  2. Trial
  3. Abnormally Low HbABritish journal of biomedical science · 2024
    Review
  4. Review
  5. Review
  6. Article
  7. HbADiabetic medicine : a journal of the British Diabetic Association · 2020
    Article
  8. Article
  9. Dried Blood Spot in Laboratory: Directions and Prospects.Diagnostics (Basel, Switzerland) · 2020
    Review
  10. Article
  11. Article
  12. Article
  13. Review
  14. Article
  15. Article
  16. Article
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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

2 authors at 1 institution in 1 country.

Ramakrishnan LakshmyDepartment of Cardiac Biochemistry, All India Institute of Medical Sciences, New Delhi, India. lakshmy_ram@yahoo.com
Ruby Gupta
All India Institute of Medical Sciences · IN

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundGlycated hemoglobin A1c (A1C) is an important marker in the diagnosis and treatment of diabetes. Dried blood measurement of A1C is useful in large scale epidemiological evaluation of A1C, especially to assess the impact of intervention programs. The possibility of using dried blood for measurement of A1C by the immunoturbidimetric method was explored in the present study.

methodBlood was collected from 30 patients, and blood spots were prepared and dried. The dried blood spot samples were kept for different lengths of time at 4 degrees C to assess stability. Glycated hemoglobin was measured in whole blood and dried blood on the day of collection as well as on days 10 and 15 by immunoturbidimetric method.

resultsThe A1C values of 30 samples analyzed for comparison between whole blood estimation and dried blood ranged from 4.6% to 9.9%. The mean A1C on the day of sample collection was 6.01% +/- 1.58% in fresh whole blood samples and 5.94% +/- 1.58 % in dried blood spots. A linear and highly correlated relationship was observed between dried blood A1C values and those in whole blood (r = 0.986 and intraclass correlation value = 0.993). Glycated hemoglobin values on day 10 and day 15 were comparable with the values on day 1 with a shift in mean of just 1% on day 10 and 3.04% on day 15.

conclusionIn conclusion, dried blood can be used for measurement of A1C by immunoturbidimetric method, and further stability of A1C measurement from dried blood for up to 15 days at 4 degrees C makes it an ideal matrix for transportation in developing countries like India.

Indexed as

Blood Specimen CollectionImmunoassayNephelometry and TurbidimetryBiomarkersGlycated HemoglobinHumansProtein StabilityReproducibility of ResultsTemperatureTime FactorsBiomarkersGlycated Hemoglobinhemoglobin A1c protein, human

Identifiers

PMID20144437
PMCPMC2769917
OpenAlexW2000698054

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.