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AIDS Care
Psychological and Socio-medical Aspects of AIDS/HIV
Volume 19, 2007 - Issue 8
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Original Articles

Patient preferences among third agent HIV medications: a US and German perspective

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Pages 982-988 | Published online: 24 Sep 2007
 

Abstract

The objective is to assess patient preferences for attributes associated with third agent HIV medications, including fosamprenavir/ritonavir (FPVr), fosamprenavir (FPV), lopinavir/ritonavir (LPVr), atazanavir (ATZ), and efavirenz (EFV). Subjects with HIV were recruited in the US and Germany to complete a computerized adaptive conjoint survey that assessed 13 attributes, including moderate to severe side effects, regimen convenience, drug resistance and efficacy. Literature on the target third-agent HIV drugs was used to identify percentage risk and severity level descriptions for each attribute. The derived preference (utility) weights for each attribute level informed the calculation of relative importance estimates for each attribute and the desirability of combinations of attributes matching the respective target third agents. The analysis included 288 HIV-positive participants (US: 132; Germany: 156), 205 of whom were treatment-experienced and 83 of whom were treatment-naïve. Of the 13 medication attributes evaluated, developing drug resistance, the risk of lipodystrophy, the risk of gastronitestinal side effects (diarrhoea, nausea and vomiting) and regimen convenience had the greatest impact on preferences. The profile based on FPVr was most preferred. Differences in the risk of developing drug resistance, risk of lipodystrophy, risk of gastrointestinal side effects and regimen convenience would likely be most influential in the perceived relative value of a third-agent medication. Physicians may wish to consider these features, especially when discussing HIV treatment options with their patients.

Acknowledgements

The authors greatly appreciate the following individuals for their assistance with data collection: 1) AidsHilfe Support Centers in Germany: Engelbert Zankl, Munich; Carlos Stemmerich, Cologne; and Jens Ahrens, Berlin; and 2) Verne Appleby, Office of Dr. Gary Richmond, Ft. Lauderdale, Florida. This research supported by GlaxoSmithKline

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