Disease progression in HIV-infected patients treated with stavudine vs. zidovudine

This prospective, observational study compared disease progression and death in HIV-1 patients treated with stavudine vs. zidovudine in the Collaborations in HIV Outcomes Research/U.S. (CHORUS) cohort. Patients with a first occurrence of CD4 count

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Veröffentlicht in:Journal of clinical epidemiology 2004-01, Vol.57 (1), p.89-97
Hauptverfasser: Justice, Amy C, Stein, Daniel S, Fusco, Gregory P, Sherrill, Beth H, Fusco, Jennifer S, Danehower, Susan C, Becker, Stephen L, Hansen, Nellie I, Graham, Neil M.H, the CHORUS Program Team
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container_end_page 97
container_issue 1
container_start_page 89
container_title Journal of clinical epidemiology
container_volume 57
creator Justice, Amy C
Stein, Daniel S
Fusco, Gregory P
Sherrill, Beth H
Fusco, Jennifer S
Danehower, Susan C
Becker, Stephen L
Hansen, Nellie I
Graham, Neil M.H
the CHORUS Program Team
description This prospective, observational study compared disease progression and death in HIV-1 patients treated with stavudine vs. zidovudine in the Collaborations in HIV Outcomes Research/U.S. (CHORUS) cohort. Patients with a first occurrence of CD4 count
doi_str_mv 10.1016/S0895-4356(03)00245-2
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Patients with a first occurrence of CD4 count &lt;500 cells/μL (n=3301) were grouped as: no nucleoside reverse transcriptase inhibitor (NRTI) use; other NRTI without stavudine or zidovudine; stavudine with no zidovudine, with or without other NRTIs; and zidovudine with no stavudine, with or without other NRTIs. The risk for death or disease progression was evaluated in unadjusted analyses and using a Cox proportional hazards model, adjusting for: study site, age, gender, race, route of HIV infection, previous AIDS-defining conditions, number of previous antiretroviral regiments, CD4 count, HIV-1 RNA, and treatment variables. Sensitivity analyses were conducted to determine the sensitivity of the results to major modeling assumptions. A landmark analysis was conducted to determine the absolute difference in time to event. During a median follow-up of 2.4 years, there were 57 deaths and 348 AIDS-defining conditions in 405 patients. Stavudine treatment compared with zidovudine resulted in a greater percentage of patients with AIDS-defining events (14.5 vs. 10.9%; P=.013), and an increased risk of disease progression (HR=1.30; 95% CI: 1.01,1.7; P=.04). This result was not sensitive to modeling assumptions. Landmark analysis demonstrated an absolute difference in time to 95% event-free survival of 2.7 months for those with a CD4⩽200 cells/μL and 11 months for those 6 months after model entry. In unadjusted and adjusted analyses of 3301 HIV-1 infected patients, stavudine containing combination therapy was associated with an increased risk of disease progression or death compared to therapy containing zidovudine. Most of the difference was attributable to new cases of wasting.</description><identifier>ISSN: 0895-4356</identifier><identifier>EISSN: 1878-5921</identifier><identifier>DOI: 10.1016/S0895-4356(03)00245-2</identifier><identifier>PMID: 15019015</identifier><language>eng</language><publisher>New York, NY: Elsevier Inc</publisher><subject>Acquired immune deficiency syndrome ; Acquired Immunodeficiency Syndrome - diagnosis ; AIDS ; Anti-HIV Agents - therapeutic use ; Antibiotics. Antiinfectious agents. Antiparasitic agents ; Antiretroviral agents ; Antiretroviral Therapy, Highly Active ; Antiviral agents ; Biological and medical sciences ; Chi-square test ; CHORUS ; Clinical outcomes ; Data collection ; Databases, Factual ; Disease prevention ; Disease Progression ; Disease-Free Survival ; Drug therapy ; Epidemiology ; Ethnicity ; Follow-Up Studies ; Health risks ; HIV ; HIV Infections - drug therapy ; HIV Infections - mortality ; HIV wasting ; HIV Wasting Syndrome - diagnosis ; Human immunodeficiency virus ; Human immunodeficiency virus 1 ; Human viral diseases ; Humans ; Infectious diseases ; Longitudinal study ; Medical sciences ; Mitochondrial DNA ; Mortality ; Observational studies ; Patients ; Pharmacology. Drug treatments ; Proportional Hazards Models ; Prospective Studies ; Reverse Transcriptase Inhibitors - therapeutic use ; Sensitivity analysis ; Stavudine ; Stavudine - therapeutic use ; Toxicity ; Viral diseases ; Viral diseases of the lymphoid tissue and the blood. 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Patients with a first occurrence of CD4 count &lt;500 cells/μL (n=3301) were grouped as: no nucleoside reverse transcriptase inhibitor (NRTI) use; other NRTI without stavudine or zidovudine; stavudine with no zidovudine, with or without other NRTIs; and zidovudine with no stavudine, with or without other NRTIs. The risk for death or disease progression was evaluated in unadjusted analyses and using a Cox proportional hazards model, adjusting for: study site, age, gender, race, route of HIV infection, previous AIDS-defining conditions, number of previous antiretroviral regiments, CD4 count, HIV-1 RNA, and treatment variables. Sensitivity analyses were conducted to determine the sensitivity of the results to major modeling assumptions. A landmark analysis was conducted to determine the absolute difference in time to event. During a median follow-up of 2.4 years, there were 57 deaths and 348 AIDS-defining conditions in 405 patients. Stavudine treatment compared with zidovudine resulted in a greater percentage of patients with AIDS-defining events (14.5 vs. 10.9%; P=.013), and an increased risk of disease progression (HR=1.30; 95% CI: 1.01,1.7; P=.04). This result was not sensitive to modeling assumptions. Landmark analysis demonstrated an absolute difference in time to 95% event-free survival of 2.7 months for those with a CD4⩽200 cells/μL and 11 months for those 6 months after model entry. In unadjusted and adjusted analyses of 3301 HIV-1 infected patients, stavudine containing combination therapy was associated with an increased risk of disease progression or death compared to therapy containing zidovudine. Most of the difference was attributable to new cases of wasting.</description><subject>Acquired immune deficiency syndrome</subject><subject>Acquired Immunodeficiency Syndrome - diagnosis</subject><subject>AIDS</subject><subject>Anti-HIV Agents - therapeutic use</subject><subject>Antibiotics. Antiinfectious agents. Antiparasitic agents</subject><subject>Antiretroviral agents</subject><subject>Antiretroviral Therapy, Highly Active</subject><subject>Antiviral agents</subject><subject>Biological and medical sciences</subject><subject>Chi-square test</subject><subject>CHORUS</subject><subject>Clinical outcomes</subject><subject>Data collection</subject><subject>Databases, Factual</subject><subject>Disease prevention</subject><subject>Disease Progression</subject><subject>Disease-Free Survival</subject><subject>Drug therapy</subject><subject>Epidemiology</subject><subject>Ethnicity</subject><subject>Follow-Up Studies</subject><subject>Health risks</subject><subject>HIV</subject><subject>HIV Infections - drug therapy</subject><subject>HIV Infections - mortality</subject><subject>HIV wasting</subject><subject>HIV Wasting Syndrome - diagnosis</subject><subject>Human immunodeficiency virus</subject><subject>Human immunodeficiency virus 1</subject><subject>Human viral diseases</subject><subject>Humans</subject><subject>Infectious diseases</subject><subject>Longitudinal study</subject><subject>Medical sciences</subject><subject>Mitochondrial DNA</subject><subject>Mortality</subject><subject>Observational studies</subject><subject>Patients</subject><subject>Pharmacology. Drug treatments</subject><subject>Proportional Hazards Models</subject><subject>Prospective Studies</subject><subject>Reverse Transcriptase Inhibitors - therapeutic use</subject><subject>Sensitivity analysis</subject><subject>Stavudine</subject><subject>Stavudine - therapeutic use</subject><subject>Toxicity</subject><subject>Viral diseases</subject><subject>Viral diseases of the lymphoid tissue and the blood. 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Antiinfectious agents. Antiparasitic agents</topic><topic>Antiretroviral agents</topic><topic>Antiretroviral Therapy, Highly Active</topic><topic>Antiviral agents</topic><topic>Biological and medical sciences</topic><topic>Chi-square test</topic><topic>CHORUS</topic><topic>Clinical outcomes</topic><topic>Data collection</topic><topic>Databases, Factual</topic><topic>Disease prevention</topic><topic>Disease Progression</topic><topic>Disease-Free Survival</topic><topic>Drug therapy</topic><topic>Epidemiology</topic><topic>Ethnicity</topic><topic>Follow-Up Studies</topic><topic>Health risks</topic><topic>HIV</topic><topic>HIV Infections - drug therapy</topic><topic>HIV Infections - mortality</topic><topic>HIV wasting</topic><topic>HIV Wasting Syndrome - diagnosis</topic><topic>Human immunodeficiency virus</topic><topic>Human immunodeficiency virus 1</topic><topic>Human viral diseases</topic><topic>Humans</topic><topic>Infectious diseases</topic><topic>Longitudinal study</topic><topic>Medical sciences</topic><topic>Mitochondrial DNA</topic><topic>Mortality</topic><topic>Observational studies</topic><topic>Patients</topic><topic>Pharmacology. Drug treatments</topic><topic>Proportional Hazards Models</topic><topic>Prospective Studies</topic><topic>Reverse Transcriptase Inhibitors - therapeutic use</topic><topic>Sensitivity analysis</topic><topic>Stavudine</topic><topic>Stavudine - therapeutic use</topic><topic>Toxicity</topic><topic>Viral diseases</topic><topic>Viral diseases of the lymphoid tissue and the blood. 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subjects Acquired immune deficiency syndrome
Acquired Immunodeficiency Syndrome - diagnosis
AIDS
Anti-HIV Agents - therapeutic use
Antibiotics. Antiinfectious agents. Antiparasitic agents
Antiretroviral agents
Antiretroviral Therapy, Highly Active
Antiviral agents
Biological and medical sciences
Chi-square test
CHORUS
Clinical outcomes
Data collection
Databases, Factual
Disease prevention
Disease Progression
Disease-Free Survival
Drug therapy
Epidemiology
Ethnicity
Follow-Up Studies
Health risks
HIV
HIV Infections - drug therapy
HIV Infections - mortality
HIV wasting
HIV Wasting Syndrome - diagnosis
Human immunodeficiency virus
Human immunodeficiency virus 1
Human viral diseases
Humans
Infectious diseases
Longitudinal study
Medical sciences
Mitochondrial DNA
Mortality
Observational studies
Patients
Pharmacology. Drug treatments
Proportional Hazards Models
Prospective Studies
Reverse Transcriptase Inhibitors - therapeutic use
Sensitivity analysis
Stavudine
Stavudine - therapeutic use
Toxicity
Viral diseases
Viral diseases of the lymphoid tissue and the blood. Aids
Zidovudine
Zidovudine - therapeutic use
title Disease progression in HIV-infected patients treated with stavudine vs. zidovudine
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