ArticleJournal of general internal medicine2011
Length and complexity of US and international HIV consent forms from federal HIV network trials.
Article in Journal of general internal medicine, 2011. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 38 papers, 2 of them syntheses that pooled it.
What it found
Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.
The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.
Who cites it
38 citing papers in PubMed, 2 syntheses or guidelines pooled it.
- Measuring and evaluating participant understanding of consent processes in clinical trials: a systematic review.Trials · 2026Pooled it
- Improving understanding in the research informed consent process: a systematic review of 54 interventions tested in randomized control trials.BMC medical ethics · 2013Pooled it
- Improved parental understanding by an enhanced informed consent form: a randomized controlled study nested in a paediatric drug trial.BMJ open · 2019Trial
- Improved participants' understanding in a healthy volunteer study using the SIDCER informed consent form: a randomized-controlled study.European journal of clinical pharmacology · 2016Trial
- A randomized controlled trial of an electronic informed consent process.Journal of empirical research on human research ethics : JERHRE · 2014Trial
- A booklet on participants' rights to improve consent for clinical research: a randomized trial.PloS one · 2012Trial
- Framing a Consent Form to Improve Consent Understanding and Determine How This Affects Willingness to Participate in HIV Cure Research: An Experimental Survey Study.Journal of empirical research on human research ethics : JERHRETrial
- eConsent vs traditional consent among prospective biobank participants: a randomized study within a study trial.npj digital public health · 2026Article
- Improving Informed Consent for English and Spanish Speakers in Clinical Trials.Therapeutic innovation & regulatory science · 2026Article
- eConsent vs. Traditional Consent Among Prospective Biobank Participants: A Randomized Trial.medRxiv : the preprint server for health sciences · 2025Article
- Towards better enrollment decision-making for perinatal clinical research: Reconsidering recruitment and consent processes to support family values and preferences.Seminars in perinatology · 2025Review
- Sex Differences in the Participation in Secondary Prevention Stroke Studies.Journal of the American Heart Association · 2025Article
- What information and the extent of information to be provided in an informed assent/consent form of pediatric drug trials.BMC medical ethics · 2022Article
- Creating concise and readable patient information sheets for interventional studies in Australia: are we there yet?Trials · 2022Article
- Informed consent: Old and new challenges in the context of the COVID-19 pandemic.Journal of clinical and translational science · 2021Article
- Behavioral and social science research to support development of educational materials for clinical trials of broadly neutralizing antibodies for HIV treatment and prevention.Clinical trials (London, England) · 2021Article
- Perceived barriers to assessing understanding and appreciation of informed consent in clinical trials: A mixed-method study.Journal of clinical and translational science · 2021Article
- Stem cell preservation for regenerative therapies: ethical and governance considerations for the health care sector.NPJ Regenerative medicine · 2020Review
- Informing Informed Consent for HIV Research.Journal of empirical research on human research ethics : JERHRE · 2020Article
- Developing informed consent materials for non-English-speaking participants: An analysis of four professional firm translations from English to Spanish.Clinical trials (London, England) · 2018Article
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
4 authors.
Funding
Abstract
backgroundInformed consent is required in most clinical research with humans. While federal regulations state consent information should be understandable to participants, concerns have been raised that consent forms are overly long and complex.
designConsent forms from 2006 HIV network trials sponsored by the National Institutes of Health (NIH), Division of AIDS (DAIDS), were analyzed for complexity and length. Comparisons were made between US and international sites, template and site forms, adult and pediatric trials, and trial type. How randomization and placebos were explained was examined as these are frequently misunderstood.
resultsOne hundred twenty-four consent forms (21 template and 103 site forms) were reviewed. Median readability was 9.2 grade level, although confidentiality sections were 12.35 median grade level. International sites' forms had lower readability than US forms (p = 0.025), template forms had lower readability than site forms (p = 0.046), and adult forms were less complex than pediatric (parent) forms (p < 0.0001). Median length of all forms was 22.4 pages; the 85 forms from adult studies had a median length of 27.4 pages. Sections describing randomization were a median length of 53 words.
conclusionsConsent forms are extremely long, exceeding recommendations for how much information readily can be processed. Networks should consider providing shorter consent templates, consistent with federal recommendations, given that sites' forms are based on these models. Further research should examine whether forms emphasizing key information (rather than providing details about all aspects of the research) improve understanding of research.
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What OpenQuestion holds
Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.