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Reliability and validity of the SF-12v2 in the medical expenditure panel survey

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Abstract

Objective

Evaluate the reliability and validity of the Medical Outcomes Study Short-Form version 2 (SF-12v2) in the 2003–2004 Medical Expenditure Panel Survey (MEPS).

Research design

Data were collected in the self-administered mail-out questionnaire and face-to-face interviews of the MEPS (n = 20,661). Internal consistency and test–retest reliability and construct, discriminate, predictive and concurrent validity were tested. The EQ-5D, perceived health and mental health questions were used to test construct and discriminate validity. Self-reported work, physical and cognitive limits tested predictive validity and number of chronic conditions assessed concurrent validity.

Results

Both Mental Component Summary Scores (MCS) and Physical Component Summary Scores (PCS) were shown to have high internal consistency reliability (α > .80). PCS showed high test–retest reliability (ICC = .78) while MCS demonstrated moderate reliability (ICC = .60). PCS had high convergent validity for EQ-5D items (except self-care) and physical health status (r > .56). MCS demonstrated moderate convergent validity on EQ-5D and mental health items (r > .38). PCS distinguish between groups with different physical and work limitations. Similarly, MCS distinguished between groups with and without cognitive limitations. The MCS and PCS showed perfect dose response when variations in scores were examined by participant’s chronic condition status.

Conclusions

Both component scores showed adequate reliability and validity with the 2003–2004 MEPS and should be suitable for use in a variety of proposes within this database.

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Abbreviations

AHRQ:

Agency for healthcare research and quality

ANOVA:

Analysis of variance

BPN-DPN:

Brief pain inventory modified for patients with diabetic peripheral neuropathy

DSM-IV:

Diagnostic and statistical manual of mental disorders 4th

EQ-5D:

EuroQoL- 5 dimension

ICC:

Intraclass correlation coefficient

MEPS:

Medical expenditure panel survey

MEPS-HC:

Medical expenditure panel survey household component

MCS:

Mental component summary score

NCHS:

National center of health statistics

PCS:

Physical component summary score

PGI:

Patient generated index

SAQ:

Self-administered questionnaire

SF-12v1:

Medical outcomes study 12-item short-form version 1

SF-12v2:

Medical outcomes study 12-item short-form version 2

SF-36:

Medical outcomes study 36-item short form

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Authors and Affiliations

  1. School of Public Health, Saint Louis University, 3545 Lafayette Avenue, St. Louis, MO, 63104, USA

    Nancy C. Cheak-Zamora

  2. United BioSource Corporation, Bethesda, MD, USA

    Kathleen W. Wyrwich

  3. George Warren Brown School of Social Work, Washington University, St. Louis, MO, USA

    Timothy D. McBride

Authors
  1. Nancy C. Cheak-Zamora
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  2. Kathleen W. Wyrwich
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  3. Timothy D. McBride
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Correspondence to Nancy C. Cheak-Zamora.

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Cheak-Zamora, N.C., Wyrwich, K.W. & McBride, T.D. Reliability and validity of the SF-12v2 in the medical expenditure panel survey. Qual Life Res 18, 727–735 (2009). https://doi.org/10.1007/s11136-009-9483-1

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  • DOI: https://doi.org/10.1007/s11136-009-9483-1

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