A randomised study of nurse collected venous blood and self-collected dried blood spots for the assessment of cardiovascular risk factors in the Understanding Society Innovation Panel
Kumari et al.
The finding, in our words
Self collected dried blood spots gave equivalent results to venous blood for lipids, HbA1c and C reactive protein, enabling similar classification of cardiovascular risk; self collection had lower response than nurse collection but similar demographic participation.
A paraphrase to the Library’s standard, never the abstract. The source is one link away and is always the authority.
The study found that although participants preferred patient-centric microsampling devices for home use, the agreement with venous plasma for measuring CRP and cytokines was inconsistent, indicating that further validation is required before these methods replace standard venipuncture.
Older adults achieved 98% adherence when self-collecting dried blood spots at home for inflammatory markers, with 97% of samples yielding valid results. Test-retest reliability was good (ICCs 0.70–0.76) and correlation with venous blood was strong (r=0.60–0.99), demonstrating that remote capillary sampling is a feasible and valid method for decentralised assessment of inflammation in older adults.
Capillary dried blood spots, after haematocrit-dependent conversion, showed good agreement with plasma for 25-hydroxyvitamin D quantification, with 90 per cent of results within 20 per cent of plasma and substantial to almost perfect agreement in status classification, supporting reliable home self-collection for large-scale vitamin D monitoring.
In a 20-person proof-of-concept pilot among veterans with HIV, remote self-collection of dried blood spots for phosphatidylethanol monitoring was feasible and acceptable, with high return and analysis rates and positive feedback; a small first step toward decentralised alcohol biomarker monitoring rather than proof of it.
The study found that quantitative dried blood spot sampling provided high clinical agreement for tacrolimus and creatinine monitoring, with patients rating the self-collection devices as user-friendly. These results support the feasibility of decentralised therapeutic drug monitoring for immunosuppressants.