Abstract
Purpose
Summary scores derived from the Medical Outcomes Study HIV Health Survey (MOS-HIV) are used to assess treatment impacts among HIV-infected patients in Western settings, but have yet to be validated in rural, African settings. We examined the reliability, validity and responsiveness of scores among a prospective cohort of 947 HIV-1-infected adults initiating antiretroviral therapy between May 2003 and May 2004 in rural Uganda.
Methods
Physical (PHS) and mental health (MHS) summary scores were developed from baseline MOS-HIV sub-domains using exploratory factor analysis. Construct and discriminant validity were established by comparing mean summary scores across known groups of sociodemographic, clinical and health status characteristics. Effect sizes were calculated to assess responsiveness to therapy.
Results
Reliability of the PHS and MHS scores was 0.79 and 0.85, respectively. Mean baseline PHS and MHS scores varied significantly by CD4 cell count, HIV viral load, WHO stage of disease and Karnofsky performance status scores. By 12 months on antiretroviral therapy, PHS and MHS scores improved by 14.6 points (P < 0.001) and 13.9 points (P < 0.001), respectively.
Conclusions
PHS and MHS scores can be derived from the MOS-HIV and used to assess health status among cohorts of patients taking antiretroviral therapy in rural Uganda.
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Abbreviations
- ANOVA:
-
Analysis of variance
- ART:
-
Antiretroviral therapy
- CD4:
-
Cluster of differentiation 4
- CDC:
-
US centers for disease control and prevention
- HIV:
-
Human immunodeficiency virus
- KPS:
-
Karnofsky performance status
- MHS:
-
Mental health summary score
- MOS-HIV:
-
Medical outcomes study HIV health survey
- PHS:
-
Physical health summary score
- PLHA:
-
People living with HIV and AIDS
- QOL:
-
Quality of life
- WHO:
-
World health organization
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Acknowledgments
This study was funded by the Centers for Disease Control and Prevention through the President’s Emergency Plan for AIDS Relief and the US Department of Health and Human Services. The authors wish to thank the participants and study team in Tororo, especially Kenneth Khana. We also wish to thank Stevens Bechange for data management and Drs. Dominique Meekers, Paul Hutchinson and Lisanne Brown for providing comments on earlier versions of this manuscript.
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The findings and conclusions in this report are those of the authors and do not necessarily represent the views of the Centers for Disease Control and Prevention.
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Stangl, A.L., Bunnell, R., Wamai, N. et al. Measuring quality of life in rural Uganda: reliability and validity of summary scores from the Medical Outcomes Study HIV Health Survey (MOS-HIV). Qual Life Res 21, 1655–1663 (2012). https://doi.org/10.1007/s11136-011-0075-5
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DOI: https://doi.org/10.1007/s11136-011-0075-5