Assessing recall and understanding of informed consent in a contraceptive clinical trial

Participants' understanding of informed consent in clinical trials: A systematic review and updated meta-analysis

Obtaining written informed consent from participants before enrolment in a study is essential. A previous study showed that only 50% of the participants in clinical trials understood the components of informed consent, and the methods of participants' understanding of informed consent were controversial. This updated meta-analysis aimed to estimate the proportion of participants in clinical trials who understand the different informed consent components. PubMed, EMBASE, the Cochrane Library, and Scopus were searched till April 2023. Therapeutic misconception, ability to name one risk, knowing that treatments were being compared, and understanding the nature of the study, the purpose of the study, the risks and side-effects, the direct benefits, placebo, randomization, voluntariness, freedom to withdraw, the availability of alternative treatment if withdrawn from the trial, confidentiality, compensation, or comprehension were evaluated. This meta-analysis included 117 studies (155 datasets; 22,118 participants). The understanding of the risks and side-effects was investigated in the largest number of studies (n = 100), whereas comparehension was investigated in the smallest number (n = 11). The highest proportions were 97.5%(95% confidence interval (CI): 97.1-97.9) for confidentiality, 95.9% (95% confidence interval (CI): 95.4-96.4) for compensation, 91.4% (95% CI: 90.7-92.1) for the nature of study, 68.1% (95% CI: 51.6-84.6) for knowing that treatments were being compared, and 67.3% (95% CI: 56.6-78) for voluntary nature of participants. The smallest proportions were the concept of placebo (4.8%, 95%CI: 4.4-5.2) and randomization(39.4%, 95%CI: 38.3-40.4). Our findings suggested that most participants understood the fundamental components of informed consent (study confidentiality, nature, compensation, voluntariness, and freedom to withdraw). The understanding of other components, such as placebo and randomization was less satisfactory.

Factors influencing client recall of contraceptive counseling at community-based distribution events in Kinshasa, Democratic Republic of the Congo

BACKGROUND

Clients must recall information from contraceptive counseling sessions to properly use their chosen method. Client recall in community-based settings is challenging given the public nature of these events and the presence of many potential distractions. Understanding the factors that influence client recall during community-based distribution events can guide future training of providers to improve proper use of contraceptive methods and client satisfaction.

METHODS

This cross-sectional study employed a convenience sample of 957 women ages 15-49 old who sought contraceptive services from community-based contraceptive distribution events in Kinshasa, Democratic Republic of the Congo, known as Lelo PF. Recall scores were developed by matching direct observations with client exit interviews. The association between recall and client characteristics, provider characteristics and an index for the quality of the provider-client interaction were tested using multivariate linear regression.

RESULTS

The average recall score was 67.6%. Recall scores were higher among clients who accepted methods with simpler administration procedures, such as CycleBeads (81.3%), compared to methods requiring more medically advanced administration procedures, such as DMPA-SC (56.6%) and Implanon-NXT (62.1%). This relationship held even after controlling for amount of information each client received. Status as a first-time user was associated with a 5.8 percentage point decrease in recall score (p = 0.002). Time since the provider's initial family planning training and clients' perception of the provider-client interaction were associated with higher client recall scores.

CONCLUSION

Results of this study suggest that to improve client recall at Lelo PF events, future provider training should focus on how to deliver clear, specific information to clients, making sure clients feel at ease during the counseling session, and treating clients with respect. First-time family planning users and clients who select methods with more medically advanced administration procedures may require extra attention during the consultation to ensure they are able understand and remember the information. Results suggest that providers who have been offering services longer may be more effective in conveying information in a way that clients can remember. Program managers should consider requesting input from experienced providers to improve training sessions.

Why 'understanding' of research may not be necessary for ethical emergency research

BACKGROUND

Randomized controlled trials (RCTs) are central to generating knowledge about effectiveness of interventions as well as risk, protective and prognostic factors related to diseases in emergency newborn care. Whether prospective participants understand the purpose of research, and what they perceive as the influence of the context on their understanding of the informed consent process for RCTs in emergency obstetric and newborn care are not well documented.

METHODS

Conceptual review.

DISCUSSION

Research is necessary to identify how the illnesses may be prevented, to explore the causes, and to investigate what medications could be used to manage such illness. Voluntary informed consent requires that prospective participants understand the disclose information about the research, and use this to make autonomous informed decision about participation, in line with their preferences and values. Yet the emergency context affects how information may be disclosed to prospective research participants, how much participants may comprehend, and how participants may express their voluntary decision to participate, all of which pose a threat to the validity of the informed consent. I challenge the claim that the 'understanding' of research is always necessary for ethical informed consent for research during emergency care. I argue for reconceptualization of the value of understanding, through recognition of other values that may be equally important. I then present a reflective perspective that frames moral reflection about autonomy, beneficence and justice in research in emergency research.

CONCLUSION

While participant 'understanding' of research is important, it is neither necessary nor sufficient for a valid informed consent, and may compete with other values with which it needs to be considered.

Assessment of the understanding of informed consent including participants' experiences, and generation of a supplemental consent decision aid for Gestational Diabetes Mellitus (GDM) research

Background: Informed consent is a basic ethical requirement of clinical research, yet deficiencies have been documented in the comprehension of its components among trial participants. Pregnancy research is sparsely conducted. Assessment of understanding of the informed consent among pregnant women suffering from Gestational Diabetes Mellitus enrolled in a randomized controlled trial, and their experiences was planned. Methodology: A prospective observational cohort study was conducted among participants of EMERGE clinical trial at the University Hospital, Galway. Willing participants allowed observation of their consent encounters. They completed the standard QuIC questionnaire at follow up visits for assessment of objective and subjective understanding of informed consent, and reasons to participate and level of satisfaction. Data was entered and analysed using Microsoft Office Excel and Minitab version 18. Results: The most commonly asked questions asked in the twenty consent encounters observed were focused upon the safety of the study drug for the developing foetuses and women. The general attitude of the women was positive towards participation. The mean objective understanding score was 72.43 ± 7 and the subjective understanding score was 91.67 ± 8.68 (out of 100). Critical components of consent like voluntarism, randomisation, withdrawal, and benefit to others were well understood. The domains related to nonstandard nature of treatment, additional risks/discomforts and compensation were poorly understood. The women cited the desire to provide benefit to future patients as the most common reason to participate, and most were satisfied with the consent process. Conclusion: Comprehension of informed consent is good in most aspects, but the grasp of certain concepts is poor among the pregnant women. Efforts are needed to improve informed consent through engagement of investigators, research nurses and possibly, the use of a decision aid.

Ethical and legal considerations for pediatric biobank consent: current and future perspectives

Innovations in laboratory and information technologies continue to drive the expansion of pediatric biorepository research, with collections of biosamples and data continuing to grow in scale and scope. In this review, we examine the trajectory of recent developments in ethical and legal scholarship on consent to pediatric biorepository research. We focus, in particular, on issues that are likely to grow in importance in coming years, either because significant controversies remain or because they represent trends that are likely to continue into the future. Of particular interest is the evolving conception of consent as a process, the trend toward increased participant engagement and other challenges likely to raise thorny new issues in this field in the decade ahead.

Informed Consent in Asymmetrical Relationships: an Investigation into Relational Factors that Influence Room for Reflection

In recent years, informed consent has been suggested as a way to deal with risks posed by engineered nanomaterials. We argue that while we can learn from experiences with informed consent in treatment and research contexts, we should be aware that informed consent traditionally pertains to certain features of the relationships between doctors and patients and researchers and research participants, rather than those between producers and consumers and employers and employees, which are more prominent in the case of engineered nanomaterials. To better understand these differences, we identify three major relational factors that influence whether valid informed consent is obtainable, namely dependency, personal proximity, and existence of shared interests. We show that each type of relationship offers different opportunities for reflection and therefore poses distinct challenges for obtaining valid informed consent. Our analysis offers a systematic understanding of the possibilities for attaining informed consent in the context of nanomaterial risks and makes clear that measures or regulations to improve the obtainment of informed consent should be attuned to the specific interpersonal relations to which it is supposed to apply.

Participants' understanding of informed consent in clinical trials over three decades: systematic review and meta-analysis

OBJECTIVE

To estimate the proportion of participants in clinical trials who understand different components of informed consent.

METHODS

Relevant studies were identified by a systematic review of PubMed, Scopus and Google Scholar and by manually reviewing reference lists for publications up to October 2013. A meta-analysis of study results was performed using a random-effects model to take account of heterogeneity.

FINDINGS

The analysis included 103 studies evaluating 135 cohorts of participants. The pooled proportion of participants who understood components of informed consent was 75.8% for freedom to withdraw at any time, 74.7% for the nature of study, 74.7% for the voluntary nature of participation, 74.0% for potential benefits, 69.6% for the study's purpose, 67.0% for potential risks and side-effects, 66.2% for confidentiality, 64.1% for the availability of alternative treatment if withdrawn, 62.9% for knowing that treatments were being compared, 53.3% for placebo and 52.1% for randomization. Most participants, 62.4%, had no therapeutic misconceptions and 54.9% could name at least one risk. Subgroup and meta-regression analyses identified covariates, such as age, educational level, critical illness, the study phase and location, that significantly affected understanding and indicated that the proportion of participants who understood informed consent had not increased over 30 years.

CONCLUSION

The proportion of participants in clinical trials who understood different components of informed consent varied from 52.1% to 75.8%. Investigators could do more to help participants achieve a complete understanding.

Patient awareness and approval for an opt-out genomic biorepository

AIM

In this study, we sought to assess patient awareness and perceptions of an opt-out biorepository.

MATERIALS & METHODS

We conducted exit interviews with adult patients and parents of pediatric patients having their blood drawn as part of their clinical care at Vanderbilt University Medical Center (TN, USA).

RESULTS

32.9% of all patients and parents of pediatric patients report having heard of the opt-out biorepository, while 92.4% approve of this research effort based on a brief description. Awareness that leftover blood could be used for research increased among adult patients during the study period, from 34.3 to 50.0%.

CONCLUSION

These findings will inform ongoing assessments of the suitability of opt-out and opt-in methods as alternatives to written informed consent for inclusion in a biorepository.

Patient-reported conformity of informed consent procedures and participation in clinical research

BACKGROUND

There is growing evidence that the quality of informed consent in clinical research is often sub-optimal.

AIMS

To explore the conformity of patient recruitment with recommended informed consent procedures among patients who were invited to participate in a clinical study at a general teaching hospital, and to examine the association between consent procedures and the patients' decision to participate.

DESIGN AND METHODS

All inpatients discharged during a 1-month period were invited to complete a mailed survey in which they reported whether they were invited to participate in a study and whether 13 recommended elements of informed consent actually occurred.

RESULTS

Among 1303 respondents, 265 (20.3%) reported that they had been invited to participate in a study, and 191 (72.1%) accepted. While the majority of potential participants were fully informed about practical issues related to the study (e.g. what their participation would consist in), <50% were informed of possible risks or benefits, and only 20% about the origin of the study funds. Only 60% reported satisfactory answers to items assessing the overall information process (e.g. explanations were easy to understand). Older and sicker patients reported lower levels of conformity with informed consent procedures, as did patients who refused to participate in a study.

CONCLUSION

Our results confirm that informed consent procedures fail to meet standards for many patients. In particular, consent information should be adapted to the needs of older and sicker patients. Improving the quality of informed consent may increase patients' participation in clinical research.

Comparison of group counseling with individual counseling in the comprehension of informed consent: a randomized controlled trial

Background

Studies on different methods to supplement the traditional informed consent process have generated conflicting results. This study was designed to evaluate whether participants who received group counseling prior to administration of informed consent understood the key components of the study and the consent better than those who received individual counseling, based on the hypothesis that group counseling would foster discussion among potential participants and enhance their understanding of the informed consent.

Methods

Parents of children participating in a trial of nutritional supplementation were randomized to receive either group counseling or individual counseling prior to administration of the informed consent. To assess the participant's comprehension, a structured questionnaire was administered approximately 48-72 hours afterwards by interviewers who were blinded to the allocation group of the respondents.

Results

A total of 128 parents were recruited and follow up was established with 118 (90.2%) for the study. All respondents were aware of their child's participation in a research study and the details of sample collection. However, their understanding of study purpose, randomization and withdrawal was poor. There was no difference in comprehension of key elements of the informed consent between the intervention and control arm.

Conclusions

The results suggest that the group counseling might not influence the overall comprehension of the informed consent process. Further research is required to devise better ways of improving participants' understanding of randomization in clinical trials.

Trial Registration

Clinical Trial Registry - India (CTRI): CTRI/2009/091/000612

Informed consent: how much and what do patients understand?

OBJECTIVE

We sought to evaluate the degree of patients' understanding of several aspects of the informed consent process for surgery and clinical research.

METHODS

We conducted a systematic search of PubMed (1961-2006) to identify relevant articles.

RESULTS

We retrieved 23 and 30 eligible for inclusion articles regarding informed consent for surgery and clinical research, respectively. Regarding surgery, adequate overall understanding of the information provided and of the risks associated with surgery was shown in 6 of 21 (29%) and 5 of 14 (36%) studies providing relevant data, respectively. Regarding clinical research, adequate understanding of the aim of the study, the process of randomization, voluntarism, withdrawal, and the risks and the benefits of treatment was shown in 14 of 26 (54%), 4 of 8 (50%), 7 of 15 (47%), 7 of 16 (44%), 8 of 16 (50%), and 4 of 7 (57%) of studies providing relevant data, respectively. Satisfaction by the amount of the given information was shown in 7 of 12 (58%) studies involving surgery and 12 of 15 (80%) studies involving clinical research.

CONCLUSIONS

Further attention should be drawn on enhancing patients' understanding regarding several components of the informed consent process for surgery and clinical research.

Understanding and retention of the informed consent process among parents in rural northern Ghana

Background

The individual informed consent model remains critical to the ethical conduct and regulation of research involving human beings. Parental informed consent process in a rural setting of northern Ghana was studied to describe comprehension and retention among parents as part of the evaluation of the existing informed consent process.

Methods

The study involved 270 female parents who gave consent for their children to participate in a prospective cohort study that evaluated immune correlates of protection against childhood malaria in northern Ghana. A semi-structured interview with questions based on the informed consent themes was administered. Parents were interviewed on their comprehension and retention of the process and also on ways to improve upon the existing process.

Results

The average parental age was 33.3 years (range 18–62), married women constituted a majority (91.9%), Christians (71.9%), farmers (62.2%) and those with no formal education (53.7%). Only 3% had ever taken part in a research and 54% had at least one relation ever participate in a research. About 90% of parents knew their children were involved in a research study that was not related to medical care, and 66% said the study procedures were thoroughly explained to them. Approximately, 70% recalled the study involved direct benefits compared with 20% for direct risks. The majority (95%) understood study participation was completely voluntary but only 21% recalled they could withdraw from the study without giving reasons. Younger parents had more consistent comprehension than older ones. Maternal reasons for allowing their children to take part in the research were free medical care (36.5%), better medical care (18.8%), general benefits (29.4%), contribution to research in the area (8.8%) and benefit to the community (1.8%). Parental suggestions for improving the consent process included devoting more time for explanations (46.9%), use of the local languages (15.9%) and obtaining consent at home (10.3%).

Conclusion

Significant but varied comprehension of the informed consent process exists among parents who participate in research activities in northern Ghana and it appears the existing practices are fairly effective in informing research participants in the study area.

Patients' perception of the informed consent process for neurooncology clinical trials

The informed consent process is a cornerstone of modern medical research. This study was conducted to explore the process in the context of neurooncology clinical trials. Qualitative methodology and analysis were used on open-ended, face-to-face interviews conducted with 21 patients. Six comprehensive themes emerged: (1) general understanding of the objectives and purpose of clinical trials was good, (2) recall of risks was low, (3) patients did not believe that their care would be compromised by forgoing the clinical trial, (4) patients felt participation was voluntary and free of coercion, (5) patients would not have withdrawn from the trial in the event of complications, and (6) patients were satisfied with the informed consent process. Informed consent is a dynamic process; when appropriately executed, it can be a powerful safeguard protecting patient autonomy. If sufficient time is allowed to deliberate participation and ample opportunity is provided for information sharing and disclosure, researchers can be confident that participants are knowledgeable about the trial and aware of their rights.

A model designed to enhance informed consent: experiences from the HIV prevention trials network

HIV prevention research in developing countries has resulted in increased attention to and discussion of ethical issues, particularly the issue of the quality of informed consent. We present a conceptual framework for an enhanced informed consent process, drawing on experiences garnered from domestic and international studies conducted by the HIV Prevention Trials Network, funded by the National Institutes of Health. This framework guides the development of an informed consent process designed to help ensure initial and continued comprehension of research participation, with an emphasis on HIV prevention research. Attention is focused at the individual and community levels and on 3 study phases: preenrollment, enrollment, and postenrollment.