Zidovudine, Didanosine, or Both as the Initial Treatment for Symptomatic HIV-Infected Children
Janet A. Englund, M.D., Carol J. Baker, M.D., Claire Raskino, M.Sc., Ross E. McKinney, M.D., Barbara Petrie, R.N., Mary Glenn Fowler, M.D., M.P.H., Deborah Pearson, Ph.D., Anne Gershon, M.D., George D. McSherry, M.D., Elaine J. Abrams, M.D., Jenny Schliozberg, M.D., John L. Sullivan, M.D., Rachel Behrman, James C. Connor, Seth Hetherington, Marta H. Lifschitz, Colin McLaren, Herman Mendez, Karen Millison, Jack Moye, Molly Nozyce, Karen O'Donnell, Lynette Purdue, David Schoenfeld, Gwendolynn Scott, Stephen A. Spector, Diane W. Wara, for The AIDS Clinical Trials Group (ACTG) Study 152 Team
Background Zidovudine has been the drug of choice for the initialtreatment of symptomatic children infected with the human immunodeficiencyvirus (HIV). This trial was designed to assess the efficacyand safety of treatment with zidovudine alone as compared witheither didanosine alone or combination therapy with zidovudineplus didanosine.
Methods In this multicenter, double-blind study, symptomaticHIV-infected children 3 months through 18 years of age werestratified according to age (<30 months or >30 months)and randomly assigned to receive zidovudine, didanosine, orzidovudine plus didanosine. The primary end point was lengthof time to death or to progression of HIV disease.
Results Of the 831 children who could be evaluated, 92 percenthad never received antiretroviral therapy and 90 percent hadacquired HIV perinatally. An interim analysis (median follow-up,23 months) showed a significantly higher risk of HIV-diseaseprogression or death in patients receiving zidovudine alonethan in those receiving combination therapy (relative risk,0.61; 95 percent confidence interval, 0.42 to 0.88; P = 0.007).The study arm with zidovudine alone was stopped and unblinded;the other two treatment arms were continued. At the end of thestudy, didanosine alone had an efficacy similar to that of zidovudineplus didanosine (median follow-up, 32 months) (relative riskof disease progression or death, 0.98; 95 percent confidenceinterval, 0.70 to 1.37; P = 0.91). A significantly lower riskof anemia or neutropenia was seen in patients receiving didanosinealone (P = 0.036).
Conclusions In symptomatic HIV-infected children, treatmentwith either didanosine alone or zidovudine plus didanosine wasmore effective than treatment with zidovudine alone. The efficacyof didanosine alone was similar to that of the combination therapyand was associated with less hematologic toxicity.
Source Information
From the Departments of Pediatrics and of Microbiology and Immunology, Baylor College of Medicine, Houston (J.A.E., C.J.B.); the Department of Biostatistics, Harvard School of Public Health, Boston (C.R.); the Department of Pediatrics, Duke University School of Medicine, Durham, N.C. (R.E.M.); Frontier Science and Technology Research Foundation, Amherst, N.Y. (B.P.); the National Institute of Allergy and Infectious Diseases, Bethesda, Md. (M.G.F.); the Department of Psychiatry and Behavioral Sciences, University of Texas Health Science Center, Houston (D.P.); the Department of Pediatrics, Columbia University, New York (A.G.); the Department of Pediatrics, Children's Hospital of New Jersey, Newark (G.D.M.); the Department of Pediatrics, Harlem Hospital, New York (E.J.A.); the Department of Pediatrics, Albert Einstein College of Medicine, New York (J.S.); and the Department of Pediatrics, University of Massachusetts, Amherst (J.L.S.). Other authors were Rachel Behrman, M.D. (Food and Drug Administration, Kensington, Md.), James C. Connor, M.D. (University of California, San Diego), Seth Hetherington, M.D. (GlaxoWellcome Pharmaceuticals, Research Triangle Park, N.C.), Marta H. Lifschitz, M.D. (Baylor College of Medicine, Houston) (deceased), Colin McLaren, Ph.D. (Bristol-Myers Squibb Pharmaceuticals, Wallingford, Conn.), Herman Mendez, M.D. (State University of New York Health Science Center, Brooklyn), Karen Millison, B.S., Clinical Trials Specialist (ACTG Operations Office, Bethesda, Md.), Jack Moye, M.D. (Pediatric and Adolescent Branch, National Institute of Child Health and Human Development, Bethesda, Md.), Molly Nozyce, Ph.D. (Bronx Lebanon Hospital, New York), Karen O'Donnell, Ph.D. (Duke University School of Medicine, Durham, N.C.), Lynette Purdue, Pharm.D. (National Institute of Allergy and Infectious Diseases, Bethesda, Md.), David Schoenfeld, Ph.D. (Harvard School of Public Health, Boston), Gwendolynn Scott, M.D. (University of Miami School of Medicine, Miami), Stephen A. Spector, M.D. (University of California, San Diego), and Diane W. Wara, M.D. (University of California, San Francisco).
Address reprint requests to Dr. Englund at the Department of Microbiology and Immunology, Baylor College of Medicine, Houston, TX 77030.
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