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. 2012 Aug;23(3):1123-36.
doi: 10.1353/hpu.2012.0092.

Construct validity of the SF-12 among American Indian and Alaska Native people using two known scoring methods

Sandra L Edwards, Molly McFadden, Anne P Lanier, Maureen A Murtaugh, Elizabeth D Ferucci, Diana G Redwood, Lillian Tom-Orme, Martha L Slattery

Construct validity of the SF-12 among American Indian and Alaska Native people using two known scoring methods

Sandra L Edwards et al. J Health Care Poor Underserved. 2012 Aug.

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.

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Figures

Figure 1
Figure 1
Comparison of PCS12, MCS12, PHC, and MHC to perceived general health status, EARTH Study 2005–2007.
Figure 2
Figure 2
Prevalence ratios for being in the lowest decile for PCS12 and PHC scores for self-reported medical conditions, EARTH Study 2005–2007.
Figure 3
Figure 3
Prevalence ratios for being in the lowest decile for MCS12 and MHC scores for self-reported medical conditions and lifestyle factors, EARTH Study 2005–2007.
See this image and copyright information in PMC

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