Are different measures of self-rated health comparable?
Health levels based on different measurements of SRH are not directly comparable and require rescaling of items. However, both versions represent parallel assessments of the same latent health variable. We did not find evidence that the WHO version is preferable to the US version as standard measure of SRH in European countries.
Our results suggest that, under optimal conditions, the five automated cobalamin assays assessed are not susceptible to IFBA-mediated interference.