Comparability of HbA1c and lipids measured with dried blood spot versus venous samples: a systematic review and meta-analysis

BMC Clinical Pathology

Bruce C Neal²  Clara K Chow¹  Devarsetty Praveen²  Eshan T Affan² 

[1] Westmead Hospital, Sydney, Australia;The University of Sydney, Sydney, Australia

关键词: Triglycerides;    Total cholesterol;    Meta-analysis;    Lipids;    HbA1c;    Dried blood spot;   

Others  :  821221
DOI  :  10.1186/1472-6890-14-21

 received in 2013-08-06, accepted in 2014-05-01,  发布年份 2014

【 摘 要 】

Background

Levels of haemoglobin A1_c (HbA1_c) and blood lipids are important determinants of risk in patients with diabetes. Standard analysis methods based upon venous blood samples can be logistically challenging in resource-poor settings where much of the diabetes epidemic is occurring. Dried blood spots (DBS) provide a simple alternative method for sample collection but the comparability of data from analyses based on DBS is not well established.

Methods

We conducted a systematic review and meta-analysis to define the association of findings for HbA1_c and blood lipids for analyses based upon standard methods compared to DBS. The Cochrane, Embase and Medline databases were searched for relevant reports and summary regression lines were estimated.

Results

705 abstracts were found by the initial electronic search with 6 further reports identified by manual review of the full papers. 16 studies provided data for one or more outcomes of interest. There was a close agreement between the results for HbA1_c assays based on venous and DBS samples (DBS = 0.9858venous + 0.3809), except for assays based upon affinity chromatography. Significant adjustment was required for assays of total cholesterol (DBS = 0.6807venous + 1.151) but results for triglycerides (DBS = 0.9557venous + 0.1427) were directly comparable.

Conclusions

For HbA1_c and selected blood lipids, assays based on DBS samples are clearly associated with assays based on standard venous samples. There are, however, significant uncertainties about the nature of these associations and there is a need for standardisation of the sample collection, transportation, storage and analysis methods before the technique can be considered mainstream. This should be a research priority because better elucidation of metabolic risks in resource poor settings, where venous sampling is infeasible, will be key to addressing the global epidemic of cardiovascular diseases.

【 授权许可】

   
2014 Affan et al.; licensee BioMed Central Ltd.

【 图 表 】

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