Early vs deferred highly active antiretroviral therapy in HIV infected infants: a European Collaborative Cohort Study
- 1.9k Downloads
KeywordsEstimate Hazard Ratio Rapid Disease Progression Infected Infant Deferred Treatment Subsequent Incidence
Without antiretroviral therapy (ART), approximately 20% of HIV-1 vertically infected infants develop severe disease manifestations before the age of 1 year  and surrogate markers poorly predict infants at higher risk of rapid disease progression. Several small prospective and retrospective studies in developed countries have suggested that ART initiated early in life could prevent this rapid clinical and immunologic deterioration [2, 3, 4, 5, 6].
Because of the small number of HIV-infected infants delivered in industrialized countries where mother to child transmission prophylaxis is widely applied, a prospective study of early versus delayed ART is currently not feasible. Implementation of early ART has varied across countries and over time since 1996 in Europe. The objective of this collaborative study was to compare the outcome of infants who received ART early in life with the outcome of those with deferred treatment.
Materials and methods
Children born between 01/09/96 and 31/12/2004 to mothers with known HIV infection at birth, who received neonatal prophylaxis, and diagnosed with HIV before age 3 months were eligible. The children who were identified as HIV-infected at the same time or after being diagnosed with AIDS, and children who develop AIDS before the age of 3 months were excluded. Thirteen prospective and retrospective cohorts from 11 European countries participated, enrolling a total of 210 eligible infants. Data including general demographics and pregnancy data, details of prophylaxis and ART in early life, CDC events and death, immunological and virological measurements since birth, were collected and pooled. The risk of AIDS/death was estimated by Kaplan-Meier survival analysis, and compared between the groups of infant treated or not treated before 3 months of age. Cox regression was used to estimate hazard ratios.
Among the 210 children, 21 developed AIDS and 3 died. The exposure to treatment was heterogeneous among cohorts. Overall ART and Highly active ART were initiated in 59% and 48% of the infants before 3 months of age and in 87% and 76% by one year, respectively.
The preliminary results of this retrospective collaborative study suggest a significant association between ART started before the age of 3 months and a lower subsequent incidence of AIDS/death in infancy.
The study was supported by Paediatric European Network for the Treatment of AIDS. We thank all collaborators of the European Infant Collaborative study.
- 5.Van der Linden D, Hainaut M, Goetghebuer T, et al: Effectiveness of early initiation of protease inhibitor-sparing antiretroviral regimen in human immunodeficiency virus-1 vertically infected infants. Pediatr Infect Dis J. 2007, 26 (4): 359-361. 10.1097/01.inf.0000258626.34984.eb.CrossRefPubMedGoogle Scholar
This article is published under license to BioMed Central Ltd.