Marilyn M. Schapira|Cindy M. Walker|Kevin Cappaert|Pamela Ganschow|Kathlyn E. Fletcher|Emily L. McGinley|Sam Del Pozo|Carrie Schauer|Sergey Tarima|Elizabeth A. Jacobs
The Numeracy Understanding in Medicine Instrument
University of Pennsylvania|University of Wisconsin–Milwaukee|John H. Stroger, Jr. Hospital of Cook County|Rush University Medical Center|Milwaukee VA Medical Center|Medical College of Wisconsin|University of Pennsylvania|University of Wisconsin–Milwaukee|John H. Stroger, Jr. Hospital of Cook County|Rush University Medical Center|Milwaukee VA Medical Center|Medical College of Wisconsin|University of Pennsylvania|University of Wisconsin–Milwaukee|John H. Stroger, Jr. Hospital of Cook County|Rush University Medical Center|Milwaukee VA Medical Center|Medical College of Wisconsin|University of Pennsylvania|University of Wisconsin–Milwaukee|John H. Stroger, Jr. Hospital of Cook County|Rush University Medical Center|Milwaukee VA Medical Center|Medical College of Wisconsin|University of Pennsylvania|University of Wisconsin–Milwaukee|John H. Stroger, Jr. Hospital of Cook County|Rush University Medical Center|Milwaukee VA Medical Center|Medical College of Wisconsin|University of Pennsylvania|University of Wisconsin–Milwaukee|John H. Stroger, Jr. Hospital of Cook County|Rush University Medical Center|Milwaukee VA Medical Center|Medical College of Wisconsin|University of Pennsylvania|University of Wisconsin–Milwaukee|John H. Stroger, Jr. Hospital of Cook County|Rush University Medical Center|Milwaukee VA Medical Center|Medical College of Wisconsin|University of Pennsylvania|University of Wisconsin–Milwaukee|John H. Stroger, Jr. Hospital of Cook County|Rush University Medical Center|Milwaukee VA Medical Center|Medical College of Wisconsin|University of Pennsylvania|University of Wisconsin–Milwaukee|John H. Stroger, Jr. Hospital of Cook County|Rush University Medical Center|Milwaukee VA Medical Center|Medical College of Wisconsin|University of Pennsylvania|University of Wisconsin–Milwaukee|John H. Stroger, Jr. Hospital of Cook County|Rush University Medical Center|Milwaukee VA Medical Center|Medical College of Wisconsin
background health numeracy defined ability understand apply information conveyed numbers tables graphs probabilities statistics effectively communicate health care providers take care ones health participate medical decisions objective develop numeracy understanding medicine instrument numi using item response theory scaling methods design 20item test formed drawing item bank numeracy questions items calibrated using responses 1000 participants 2parameter item response theory model construct validity assessed comparing scores numi established measures print numeric health literacy mathematic achievement cognitive aptitude participants community clinical populations milwaukee chicago metropolitan areas results twentynine percent 1000 respondents hispanic 24 nonhispanic white 42 nonhispanic black fortyone percent high school education mean score numi 132 46 cronbach 086 difficulty discrimination item response theory parameters 20 items ranged 170 145 039 198 respectively performance numi strongly correlated wide range achievement testarithmetic 073 p lt 0001 lipkus expanded numeracy scale 069 p lt 0001 medical data interpretation test 075 p lt 0001 wonderlic cognitive ability test 082 p lt 0001 performance moderately correlated short test functional health literacy 043 p lt 0001 limitations numi found discriminating among respondents lowerthanaverage level health numeracy conclusions numi applied research clinical settings robust measure health numeracy construct