Assessing Mediation in HIV Intervention Studies
نویسندگان
چکیده
منابع مشابه
Multilevel mediation modeling in group-based intervention studies.
This article proposes and evaluates a method to test for mediation in multilevel data sets formed when an intervention administered to intact groups is designed to produce change in individual mediator and outcome variables. Simulated data of this form were used to compare ordinary least squares (OLS) and two multilevel estimators of the mediated effect. OLS and multilevel standard error approx...
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This two-wave national panel study was designed to test the causal claims of the “cognitive mediation model.” The data indicate strong support for the following causal relationships predicted by the model: (a) surveillance motivations influence information processing, (b) information processing influences knowledge, and (c) motivations influence knowledge only indirectly through information pro...
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tionships. Whether it is examining the persuasive impact of public service announcements on attitudes and behavior, determining the impact of viewing political debates on political knowledge or voter turnout, or assessing whether success in achieving one’s Internet browsing goals prompts greater interest in e-commerce, communication scholars frequently conduct research to answer questions about...
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BACKGROUND Benchmarking Controlled Trial (BCT) is a concept which covers all observational studies aiming to assess impact of interventions or health care system features to patients and populations. AIMS To create and pilot test a checklist for appraising methodological validity of a BCT. METHODS The checklist was created by extracting the most essential elements from the comprehensive set...
متن کاملModeration and mediation of an effective HIV risk-reduction intervention for South African adolescents.
BACKGROUND "Let Us Protect Our Future" is a sexual risk-reduction intervention for sixth-grade adolescents in South Africa. Tested in a cluster-randomized controlled trial, the intervention significantly reduced self-reported intercourse and unprotected intercourse during a 12-month follow-up period. PURPOSE The present analyses were conducted to identify moderators of the intervention's effi...
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ژورنال
عنوان ژورنال: Public Health Reports
سال: 2009
ISSN: 0033-3549,1468-2877
DOI: 10.1177/003335490912400217