title: Construct validity of the SF-12 among American Indian and Alaska Native people using two known scoring methods.
abstract: OBJECTIVE
  This study evaluated the construct validity of the 12-Item Short Form Survey Instrument (SF-12) in a cohort of American Indian and Alaska Native (AIAN) people. We evaluated two scoring methods to determine their utility in this population.
  
  
  METHODS
  Participants (N = 11,127) were aged 18 and older, self-identified as AIAN, and had complete SF-12 interview data. Physical and mental health summary scores were calculated using traditional SF-12 (PCS12 and MCS12) and RAND-12 (PHC and MHC) scoring methods.
  
  
  RESULTS
  Women scored lower than men on the PHC, PCS12, MHC, and MCS12, as did those with more medical conditions versus none. Those aged 55 and older scored lower on the PHC and PCS12 than younger people. There was no difference in the mean MCS12 score by age and for those 31-55 and aged older than 55 for the MHC.
  
  
  CONCLUSIONS
  This study demonstrates the construct validity of the PCS12/MCS12 and PHC/MHC in a cohort of AIAN people.
authors.forename: Sandra L
authors.initials: SL
authors.lastname: Edwards
authors.forename: Molly
authors.initials: M
authors.lastname: McFadden
authors.forename: Anne P
authors.initials: AP
authors.lastname: Lanier
authors.forename: Maureen A
authors.initials: MA
authors.lastname: Murtaugh
authors.forename: Elizabeth D
authors.initials: ED
authors.lastname: Ferucci
authors.forename: Diana G
authors.initials: DG
authors.lastname: Redwood
authors.forename: Lillian
authors.initials: L
authors.lastname: Tom-Orme
authors.forename: Martha L
authors.initials: ML
authors.lastname: Slattery
mesh_terms: D000328:Adult; D000413:Alaska; D005260:Female; D015438:Health Behavior / Q000208:ethnology; D006304:Health Status; D006801:Humans; D007198:Indians, North American; D008297:Male; D008603:Mental Health; D008875:Middle Aged; D011788:Quality of Life; D012737:Sex Factors; D011795:Surveys and Questionnaires; D014589:Utah