Gill Rowlands|Nina Khazaezadeh|Eugene Oteng?Ntim|Paul T. Seed|Suzanne Barr|Barry D. Weiss
Development and validation of a measure of health literacy in the UK: the newest vital sign
London South Bank University|Guy's and St Thomas' NHS Foundation Trust|Guy's and St Thomas' NHS Foundation Trust|King's College London|King's College London|University of Arizona
health literacy hl important public health issue current measures drawbacks length andor acceptability usdeveloped newest vital sign nvs health literacy instrument measures reading comprehension numeracy skills using nutrition label takes 3 minutes administer proven acceptable research subjects study aimed amend validate uk population used threestage process 1 delphi study academic clinical experts amend nvs label reflect uk nutrition labeling 2 communitybased cognitive testing assess improve ease understanding acceptability test 3 validation nvsuk accepted standard test health literacy test functional health literacy adults tofhla pearsons r area receiver operating characteristic roc curve participant educational level sample size calculation indicated 250 participants would required inclusion criteria age 1875 years ability converse english excluded people working health field impaired vision inability undertake interview due cognitive impairment inability converse english delphi study 28 experts reached consensus 3 cycles cognitive testing 80 participants yielded instrument needed refinement validation testing 337 participants showed high internal consistency cronbachs alpha 074 validation tofhla demonstrated pearsons r 049 area roc curve 081 nvsuk valid measure hl acceptability ease application makes ideal tool use uk potential uses public health research including epidemiological surveys randomized controlled trials enabling practitioners tailor care patient need