Clinical trials and systematic reviews addressing similar interventions for the same condition do not consider similar outcomes to be important: a case study in HIV/AIDS



Saldanha, Ian J, Li, Tianjing, Yang, Cui, Owczarzak, Jill, Williamson, Paula R ORCID: 0000-0001-9802-6636 and Dickersin, Kay
(2017) Clinical trials and systematic reviews addressing similar interventions for the same condition do not consider similar outcomes to be important: a case study in HIV/AIDS. JOURNAL OF CLINICAL EPIDEMIOLOGY, 84. pp. 85-94.

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Abstract

<h4>Background</h4>The usefulness of clinical trials and systematic reviews is compromised when they report different outcomes. We compared outcomes in reviews of HIV/AIDS and the trials included in the reviews.<h4>Study design and setting</h4>We examined all Cochrane reviews of HIV/AIDS (as of June 2013) that included ≥1 trial and the trials that the reviews included. We compared outcomes within subgroups defined by type of intervention: clinical management, biomedical prevention, behavioral prevention, and health services.<h4>Results</h4>We included 84 reviews that encompassed 524 trials. Although the median number of outcomes per trial (8) and per review (7.5) was similar, the trials reported a considerably greater number of unique outcomes than the reviews (779 vs. 218), ranging from 2.3 times greater (clinical management) to 5.4 times greater (behavioral prevention). High proportions of trial outcomes were not in any review: 68% (clinical management) to 83% (behavioral prevention). Lower proportions of review outcomes were not in any trial: 11% (clinical management) to 39% (health services).<h4>Conclusion</h4>Outcomes in trials and reviews are not well aligned for appropriate inclusion of trial results in reviews and meta-analyses. Differences in perspectives, goals, and constraints between trialists and reviewers may explain differences in outcomes they consider important.

Item Type: Article
Uncontrolled Keywords: Clinical trials, Systematic reviews, Outcomes, HIV/AIDS, Core outcome sets, Outcome selection
Depositing User: Symplectic Admin
Date Deposited: 13 Mar 2017 07:51
Last Modified: 19 Jan 2023 07:14
DOI: 10.1016/j.jclinepi.2017.02.005
Related URLs:
URI: https://livrepository.liverpool.ac.uk/id/eprint/3006333