How Health Professionals Conceptualize and Represent Placebo Treatment in Clinical Trials and How Their Patients Understand It: Impact on Validity of Informed Consent

Photobiomodulation in the management of oral mucositis for adult head and neck cancer patients receiving irradiation: the LiTEFORM RCT

BACKGROUND

Oral mucositis is a debilitating and painful complication of head and neck cancer irradiation that is characterised by inflammation of the mucous membranes, erythema and ulceration. Oral mucositis affects 6000 head and neck cancer patients per year in England and Wales. Current treatments have not proven to be effective. International studies suggest that low-level laser therapy may be an effective treatment.

OBJECTIVES

To assess the clinical effectiveness and cost-effectiveness of low-level laser therapy in the management of oral mucositis in head and neck cancer irradiation. To identify barriers to and facilitators of implementing low-level laser therapy in routine care.

DESIGN

Placebo-controlled, individually randomised, multicentre Phase III superiority trial, with an internal pilot and health economic and qualitative process evaluations. The participants, outcome assessors and therapists were blinded.

SETTING

Nine NHS head and neck cancer sites in England and Wales.

PARTICIPANTS

A total of 87 out of 380 participants were recruited who were aged ≥ 18 years and were undergoing head and neck cancer irradiation with ≥ 60 Gy.

INTERVENTION

Random allocation (1 : 1 ratio) to either low-level laser therapy or sham low-level laser therapy three times per week for the duration of irradiation. The diode laser had the following specifications: wavelength 660 nm, power output 75 mW, beam area 1.5 cm², irradiance 50 mW/cm², exposure time 60 seconds and fluence 3 J/cm². There were 20-30 spots per session. Sham low-level laser therapy was delivered in an identical manner.

MAIN OUTCOME MEASURE

The mean Oral Mucositis Weekly Questionnaire-Head and Neck Cancer score at 6 weeks following the start of irradiation. Higher scores indicate a worse outcome.

RESULTS

A total of 231 patients were screened and, of these, 87 were randomised (low-level laser therapy arm, n = 44; sham arm, n = 43). The mean age was 59.4 years (standard deviation 8.8 years) and 69 participants (79%) were male. The mean Oral Mucositis Weekly Questionnaire-Head and Neck Cancer score at 6 weeks was 33.2 (standard deviation 10) in the low-level laser therapy arm and 27.4 (standard deviation 13.8) in the sham arm.

LIMITATIONS

The trial lacked statistical power because it did not meet the recruitment target. Staff and patients willingly participated in the trial and worked hard to make the LiTEFORM trial succeed. However, the task of introducing, embedding and sustaining new low-level laser therapy services into a complex care pathway proved challenging. Sites could deliver low-level laser therapy to only a small number of patients at a time. The administration of low-level laser therapy was viewed as straightforward, but also time-consuming and sometimes uncomfortable for both patients and staff, particularly those staff who were not used to working in a patient's mouth.

CONCLUSIONS

This trial had a robust design but lacked power to be definitive. Low-level laser therapy is relatively inexpensive. In contrast with previous trials, some patients found low-level laser therapy sessions to be difficult. The duration of low-level laser therapy sessions is, therefore, an important consideration. Clinicians experienced in oral cavity work most readily adapt to delivering low-level laser therapy, although other allied health professionals can be trained. Blinding the clinicians delivering low-level laser therapy is feasible. There are important human resource, real estate and logistical considerations for those setting up low-level laser therapy services.

FUTURE WORK

Further well-designed randomised controlled trials investigating low-level laser therapy in head and neck cancer irradiation are needed, with similar powered recruitment targets but addressing the recruitment challenges and logistical findings from this research.

TRIAL REGISTRATION

This trial is registered as ISRCTN14224600.

FUNDING

This project was funded by the National Institute for Health and Care Research ( NIHR ) Health Technology Assessment programme and will be published in full in Health Technology Assessment; Vol. 26, No. 46. See the NIHR Journals Library website for further project information.

An evaluation of the process of informed consent: views from research participants and staff

Background

The process of informed consent for enrolment to a clinical research study can be complex for both participants and research staff. Challenges include respecting the potential participant’s autonomy and information needs while simultaneously providing adequate information to enable an informed decision. Qualitative research with small sample sizes has added to our understanding of these challenges. However, there is value in garnering the perspectives of research participants and staff across larger samples to explore the impact of contextual factors (time spent, the timing of the discussion and the setting), on the informed consent process.

Methods

Research staff and research participants from Ireland and the UK were invited to complete an anonymous survey by post or online (research participants) and online (research staff). The surveys aimed to quantify the perceptions of research participants and staff regarding some contextual factors about the process of informed consent. The survey, which contained 14 and 16 multiple choice questions for research participants and staff respectively, was analysed using descriptive statistics. Both surveys included one optional, open-ended question, which were analysed thematically.

Results

Research participants (169) and research staff (115) completed the survey. Research participants were predominantly positive about the informed consent process but highlighted the importance of having sufficient time and the value of providing follow-up once the study concludes, e.g. providing results to participants. Most staff (74.4%) staff reported that they felt very confident or confident facilitating informed consent discussions, but 63% felt information leaflets were too long and/or complicated, 56% were concerned about whether participants had understood complex information and 40% felt that time constraints were a barrier. A dominant theme from the open-ended responses to the staff survey was the importance of adequate time and resources.

Conclusions

Research participants in this study were overwhelmingly positive about their experience of the informed consent process. However, research staff expressed concern about how much participants have understood and studies of patient comprehension of research study information would seem to confirm these fears. This study highlights the importance of allocating adequate time to informed consent discussions, and research staff could consider using Teach Back techniques.

Trial Registration

Not applicable

Supplementary Information

The online version contains supplementary material available at 10.1186/s13063-021-05493-1.

Independence of Coping Styles With the Patient-Doctor Relationship and Shared Decision-Making in People With Parkinson's Disease

Introduction:

Coping styles have a mediating effect on several clinical outcomes. The patient–doctor relationship and the patient’s role in decision-making process might be influenced by the way the patient reacts to certain stressors or problems due to the evolution of their disease.

Objective:

To assess the role of coping strategies on the patient–doctor relationship and the patient’s role in decision-making in a group of people with Parkinson’s disease (PD).

Methods:

A cross-sectional study was carried out. The Coping Style Questionnaire (CSQ-40), the 9-item Patient–Doctor Relationship Questionnaire (PDRQ-9), and the 9-item Shared Decision-Making Questionnaire (SDM-Q-9) were applied.

Results:

A total of 36 women and 64 men with PD were included. The predominant coping style in women was rational. In men, the detachment style was more frequent. The SDM-Q-9 mean score was 33.2 ± 11.2 (transformed median score of 80). The PDRQ-9 average score was 2.9 ± 1 (sum score of 26.1 ± 8.7). No association was found between the CSQ-40 with the PDRQ-9 or SDM-Q-9. On the other hand, the PDRQ-9 mean score and the transformed SDM-Q-9 score highly correlated (r = 0.62, P < .001).

Conclusion:

Patient–doctor relationship and shared decision-making are independent of the coping style in people with PD.

Perceptions and Attitudes of Cancer Patients and Caregivers Towards Enrollment in Clinical Trials in Lebanon

The rates of participation in oncology clinical trials (CTs) are relatively lower in the Middle East compared to other areas in the world. Many social and cultural factors underlie the patients' reluctance to participate. To probe the knowledge, attitudes, and perceptions of patients with cancer and their caregivers regarding participation in CTs at our tertiary referral center in Lebanon, we interviewed 210 patients and caregivers visiting the outpatient clinics in the Naef Basile Cancer Institute at the American University of Beirut. A questionnaire was derived from literature and administered in Arabic. The study was approved by the Institutional Review Board (IRB). Two hundred individuals agreed to answer the questionnaire. The majority of participants (90.5%) were Lebanese with the remaining being non-Lebanese Arabs. Eighty-nine participants (45%) were aware of the concepts of CTs. Eighty-two respondents (41%) would participate in phase I CTs. Twenty-nine individuals (14.5%) agree to be enrolled in CTs with the approval of their family members only. One hundred twenty-nine subjects (64.5%) stated that they would refuse enrollment in a CT where they might receive placebo. Eighty-eight (44%) of participants considered that medical records could be reviewed for research without consent while 54% agreed that samples collected during clinical workup could be used for research without the consent of the patient. There are several social and demographic correlates for participation in CTs. Raising awareness and overcoming barriers of misconception are keys to promote participation in CTs in Lebanon.