F Boutitie1, S J Pocock. 1. Medical Statistics Unit, London School of Hygiene and Tropical Medicine, UK.
Abstract
OBJECTIVE: Description of the relationship between repeated measurements of CD4 lymphocyte count and development of AIDS in asymptomatic HIV-infected patients. DESIGN: Repeated measurements of CD4 lymphocyte counts over an AIDS-free period in asymptomatic HIV-infected patients, and follow-up of the cohort to record subsequent clinical progression to AIDS. METHODS: The cohort was studied in a double-blind randomized clinical trial. CD4 lymphocyte counts were measured on three occasions over 8 months in 851 patients. RESULTS: Eighty subsequent clinical progressions to AIDS were recorded during a median follow-up period of 15.3 months. Each of the three measurements of CD4 lymphocyte count were separately predictive of subsequent progression to AIDS. However, when the three measurements were included simultaneously in a predictive model only the last measurement showed a significant predictive value. Change in individual CD4 count was also related to the risk of developing AIDS, but was no longer significant when the most recent measurement was included in the model. CONCLUSION: These results indicate the closeness of the relationship between the actual state of the immune system and subsequent progression to AIDS.
RCT Entities:
OBJECTIVE: Description of the relationship between repeated measurements of CD4 lymphocyte count and development of AIDS in asymptomatic HIV-infectedpatients. DESIGN: Repeated measurements of CD4 lymphocyte counts over an AIDS-free period in asymptomatic HIV-infectedpatients, and follow-up of the cohort to record subsequent clinical progression to AIDS. METHODS: The cohort was studied in a double-blind randomized clinical trial. CD4 lymphocyte counts were measured on three occasions over 8 months in 851 patients. RESULTS: Eighty subsequent clinical progressions to AIDS were recorded during a median follow-up period of 15.3 months. Each of the three measurements of CD4 lymphocyte count were separately predictive of subsequent progression to AIDS. However, when the three measurements were included simultaneously in a predictive model only the last measurement showed a significant predictive value. Change in individual CD4 count was also related to the risk of developing AIDS, but was no longer significant when the most recent measurement was included in the model. CONCLUSION: These results indicate the closeness of the relationship between the actual state of the immune system and subsequent progression to AIDS.
Authors: V Churdboonchart; C Sakondhavat; S Kulpradist; B I Na Ayudthya; V Chandeying; S Rugpao; C Boonshuyar; W Sukeepaisarncharoen; W Sirawaraporn; D J Carlo; R Moss Journal: Clin Diagn Lab Immunol Date: 2000-09