Concordance in COVID-19 serology, bone mineralisation, and inflammatory analytes between venous and self-collected capillary blood samples exposed to various pre-analytical conditions.

These findings suggest that remote blood collection devices can be used to measure anti-SARS-CoV-2 IgG, 25(OH)D, CRP, and ALP. Further analysis is required to evaluate the interchangeability between venous and capillary testing in Ca and Ph levels, which are more sensitive to pre-analytical conditions.