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  • Cited by 3
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    This article has been cited by the following publications. This list is generated based on data provided by CrossRef.

    2003. Estimating the effect of antiretroviral treatment during HIV seroconversion: impact of confounding in observational data. HIV Medicine, Vol. 4, Issue. 4, p. 332.

    2003. Differences in CD4 Cell Counts at Seroconversion and Decline Among 5739 HIV-1???Infected Individuals with Well-Estimated Dates of Seroconversion. JAIDS Journal of Acquired Immune Deficiency Syndromes, Vol. 34, Issue. 1, p. 76.

    2003. Short-Term CD4 Cell Response After Highly Active Antiretroviral Therapy Initiated at Different Times From Seroconversion in 1500 Seroconverters. JAIDS Journal of Acquired Immune Deficiency Syndromes, Vol. 32, Issue. 3, p. 303.


The relationships between the HIV test interval, demographic factors and HIV disease progression


Individuals developing an HIV seroconversion illness may experience rapid disease progression. Information on seroconversion illness is rarely collected in most cohort studies; thus the aim of this study was to assess the value of the HIV test interval (the time between last negative and first positive HIV tests) as a proxy for seroconversion illness. Among 8229 seroconverters, test intervals ranged from 0–5282 days, and varied by gender, risk group, age and calendar year of seroconversion. Those with intervals [les ] 31 days had an increased hazard of AIDS (RH 1·42, P = 0·07), which was reduced slightly after adjusting for baseline factors, calendar year of follow-up, treatment and the declining CD4 count, but there was no effect on survival. Thus, it appears that if information on acute seroconversion illness is not available, then analyses of progression to AIDS in seroconverter studies could use a short test interval as a proxy measure.

Corresponding author
Author for correspondence: Dr C. A. Sabin, Department of Primary Care and Population Sciences, Royal Free and University College Medical School, Rowland Hill Street, London NW3 2PF. Requests for reprints: Dr K. Porter, MRC Clinical Trials Unit, 222 Euston Road, London NW1 2DA.
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Epidemiology & Infection
  • ISSN: 0950-2688
  • EISSN: 1469-4409
  • URL: /core/journals/epidemiology-and-infection
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