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Comparison of models for analyzing two-group, cross-sectional data with a Gaussian outcome subject to a detection limit

Autor: Ryan E. Wiegand, Charles E. Rose, John M. Karon

Publikováno v: Statistical Methods in Medical Research. 25:2733-2749

A potential difficulty in the analysis of biomarker data occurs when data are subject to a detection limit. This detection limit is often defined as the point at which the true values cannot be measured reliably. Multiple, regression-type models desi

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::20dae37ca603aafa5638f86654288dea
https://doi.org/10.1177/0962280214531684

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HIV genital shedding and safety of Carraguard use by HIV-infected women: a crossover trial in Thailand

Autor: Lauri E. Markowitz, Sarah L. Braunstein, Jordan W. Tappero, Supaporn Chaikummao, Catherine A. McLean, Sara J. Whitehead, Jullapong Achalapong, Janneke van de Wijgert, Heidi E. Jones, Peter H. Kilmarx, Janet M. Mcnicoll, John M. Karon

Publikováno v: AIDS (London, England), 24(5), 717-722. Lippincott Williams and Wilkins

Objective: To evaluate the safety, including impact on genital HIV RNA shedding, of Carraguard vaginal gel in HIV-infected women. Design: This is a randomized, controlled, crossover study of Carraguard in HIV-infected women in Thailand. Methods: Each

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3d38ce50ca1cbc5d42857fc21fcb5e74
https://doi.org/10.1097/qad.0b013e328333bf89

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Estimating HIV incidence in the United States from HIV/AIDS surveillance data and biomarker HIV test results

Autor: Edward H. Kaplan, Ruiguang Song, H. Irene Hall, Ron Brookmeyer, John M. Karon

Publikováno v: Statistics in Medicine. 27:4617-4633

The development of an human immunodeficiency virus (HIV) test that detects recent infection has enabled the U.S. Centers for Disease Control and Prevention (CDC) to estimate annual HIV incidence (number of new infections per year, not per person at r

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5a579115dd42f58f1f456fbc7cad5e13
https://doi.org/10.1002/sim.3144

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An Evaluation of Statistical Methods for Analyzing Follow-Up Gaussian Laboratory Data with a Lower Quantification Limit

Autor: Ryan E. Wiegand, John M. Karon, Peter H. Kilmarx, Janneke van de Wijgert

Publikováno v: Journal of biopharmaceutical statistics, 25(4), 812-829. Taylor and Francis Ltd.

Laboratory data with a lower quantification limit (censored data) are sometimes analyzed by replacing non-quantifiable values with a single value equal to or less than the quantification limit, yielding possibly biased point estimates and variance es

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ba965f1b068ee70be281d03a6e901d12

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Estimating the Distribution of a Renewal Process from Times at which Events from an Independent Process Are Detected

Autor: Ruiguang Song, Edward White, Gary Goldbaum, John M. Karon

Publikováno v: Biometrics. 62:838-846

The analysis of length-biased data has been mostly limited to the interarrival interval of a renewal process covering a specific time point. Motivated by a surveillance problem, we consider a more general situation where this time point is random and

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::66ee74ceba15586dfa551e63eb8f8478
https://doi.org/10.1111/j.1541-0420.2006.00536.x

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Distributions of Renewal Variables When Renewal Process Reaches a Special Event

Autor: John M. Karon, Ruiguang Song

Publikováno v: Communications in Statistics - Theory and Methods. 34:1813-1819

Motivated by a problem in estimating the incidence of a disease with delayed onset of symptoms, the current, excess, and total life length distributions of a renewal process at a random event time point are considered. Distributions of these renewal

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::3373643eac7bc6ac465ceec225f84cc9
https://doi.org/10.1081/sta-200066307

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HIV-1 Viral Load and Other Risk Factors for Mother-to-Child Transmission of HIV-1 in a Breast-Feeding Population in Cote d'Ivoire

Autor: Ehounou R. Ekpini, Alan E. Greenberg, Ramses Sadek, Edith Boni-Ouattara, Thierry H. Roels, Denise J. Jamieson, John N. Nkengasong, John M. Karon, Stefan Z. Wiktor, Toussaint S. Sibailly

Publikováno v: JAIDS Journal of Acquired Immune Deficiency Syndromes. 34:430-436

Short-course antiretroviral regimens have been evaluated to reduce mother-to-child transmission of HIV in resource-limited settings. This report from Abidjan, Cote d'Ivoire, examines the risk factors for HIV transmission by 1 and 24 months among brea

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::bb05ba3e1e7f62986c20772e617b9d09
https://doi.org/10.1097/00126334-200312010-00011

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Trends in AIDS Incidence and Survival Among Racial/Ethnic Minority Men Who Have Sex with Men, United States, 1990–1999

Autor: Janet M. Blair, John M. Karon, Patricia L. Fleming

Publikováno v: JAIDS Journal of Acquired Immune Deficiency Syndromes. 31:339-347

Objectives: We describe trends in AIDS incidence, survival, and deaths among racial/ethnic minority men who have sex with men (MSM). Methods: We examined AIDS surveillance data for men diagnosed with AIDS from 1990 through 1999, survival trends from

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::aeea8699f0d4fcc26b2203d04f830781
https://doi.org/10.1097/00126334-200211010-00011

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