Patient Recruitment in Radiation Therapy Research: An Evaluation of Local Challenges

INTRODUCTION

Locally-initiated research studies in radiation therapy (RT) aim to substantiate clinical processes and are an effective approach to gather evidence for advances in patient care, new techniques, and protocols. The aim of this study was to retrospectively quantify recruitment challenges at a radiation oncology network (RON).

METHODS

Five locally initiated studies were included for analysis through the criteria of being undertaken within 2001-2017, initiated through local research teams, and having recruitment records available. Data extraction from each study included duration, aims, patient activities, recruitment strategy, target number of participants, and number of participants who were recruited/not recruited and who withdrew from the study. Reasons for nonregistration and withdrawal were recorded if available. Two studies are presented as case studies.

RESULTS

Included studies were diverse in patient population and study aim and included patient immobilization (lung and breast cancer), evaluation of radiation-induced esophagitis, documentation of anatomical and dosimetric changes in patients with head and neck cancer, and education (breast cancer). The exclusion of non-English-speaking patients, which is significant for the RON, which covers a wide cultural and linguistic diversity, was an important limiting factor, along with RT patients' disinterest in participation.

DISCUSSION

Challenges experienced in the evaluated RON studies are similar to non-RT clinical trials and included difficulties with patients interacting with study protocol, health practitioners' influence, and patient-related inclusion issues.

CONCLUSION

The resulting database provides a foundation for continued monitoring and documentation of study recruitment practice, which could elicit positive effects on planning and implementation of future patient recruitment strategies in RT locally initiated studies.

An investigation into the incidence of pain flare in patients undergoing radiotherapy for symptomatic bone metastases

INTRODUCTION

External Beam Radiotherapy (EBRT) is a recognised intervention for symptomatic pain relief from bone metastases. Pain flare is a reported EBRT toxicity, described in 16-41% of steroid-naïve patients. This study aimed to determine incidence and duration of pain flare amongst patients within one Oncology Centre.

METHODS

Patients receiving EBRT for bone metastases were recruited to a prospective cohort study. Baseline pain scores and a daily pain/analgesia diary were recorded during EBRT and for 14 days thereafter. Pain flare was defined as a two-point increase on a pain scale or 25% increase in analgesia intake, with a return to baseline.

RESULTS

Of the thirty-two participants, 69% (n = 22) completed the diary. 41% (n = 9) patients experienced pain flare, the median duration being 3 days. Of the evaluable patients, 55% (n = 12) were male, 45% (n = 9) female. The median age was 73 years (range 40-83). The common primary sites of disease were Breast (32%) and Prostate (32%), with other sites making up the remaining 36%. The most frequent EBRT site was the spine (63%), with other treatment sites including pelvis (23%) and extremities (14%). EBRT regimes were restricted to 20 Gy in 5 treatments, received by 32% (n = 7) of patients and 8 Gy in 1 treatment (68% (n = 14)). Of these two regimes, pain flare was reported by 29% and 47% respectively.

CONCLUSION

Pain flare is a common toxicity of EBRT for bone metastases. Taking the small sample size into consideration, the incidence and duration of pain flare in patients within this single-centre study are comparable with those found in international studies.

Investigating patient recruitment to radiotherapy clinical trials

Background

Radiotherapy randomised controlled trials provide evidence to support the development of new techniques and dose/fractionation regimens. Some radiotherapy trials have previously had to close early or revise targets due to low recruitment rates. Many authors have recommended research into recruitment strategies for many areas of medicine, however little work has been carried out in the specific field of radiotherapy.

Method

Using a survey of research radiographers followed by radiotherapy patient interviews, this project provides perspectives on motives for patient participation in radiotherapy clinical trials, and how to best support people through this decision-making process.

Findings

The main factors influencing participation identified by the radiographers were altruism, treatment fatigue and concerns about the trial arms, lack of resources and lack of commitment from some medical colleagues. For patients the main factors were mainly emotional; altruism, and fears for efficacy of different trial arms featured, with requests for timely communication of trial information.

Conclusion

We recommend that strategies should be offered proactively to support patients through the decision-making process when considering trial participation. Research radiographers are ideally qualified to offer support and expert knowledge to these patients.

Strategies designed to help healthcare professionals to recruit participants to research studies

BACKGROUND

Identifying and approaching eligible participants for recruitment to research studies usually relies on healthcare professionals. This process is sometimes hampered by deliberate or inadvertent gatekeeping that can introduce bias into patient selection.

OBJECTIVES

Our primary objective was to identify and assess the effect of strategies designed to help healthcare professionals to recruit participants to research studies.

SEARCH METHODS

We performed searches on 5 January 2015 in the following electronic databases: Cochrane Methodology Register, CENTRAL, MEDLINE, EMBASE, CINAHL, British Nursing Index, PsycINFO, ASSIA and Web of Science (SSCI, SCI-EXPANDED) from 1985 onwards. We checked the reference lists of all included studies and relevant review articles and did citation tracking through Web of Science for all included studies.

SELECTION CRITERIA

We selected all studies that evaluated a strategy to identify and recruit participants for research via healthcare professionals and provided pre-post comparison data on recruitment rates.

DATA COLLECTION AND ANALYSIS

Two review authors independently screened search results for potential eligibility, read full papers, applied the selection criteria and extracted data. We calculated risk ratios for each study to indicate the effect of each strategy.

MAIN RESULTS

Eleven studies met our eligibility criteria and all were at medium or high risk of bias. Only five studies gave the total number of participants (totalling 7372 participants). Three studies used a randomised design, with the others using pre-post comparisons. Several different strategies were investigated. Four studies examined the impact of additional visits or information for the study site, with no increases in recruitment demonstrated. Increased recruitment rates were reported in two studies that used a dedicated clinical recruiter, and five studies that introduced an automated alert system for identifying eligible participants. The studies were embedded into trials evaluating care in oncology mainly but also in emergency departments, diabetes and lower back pain.

AUTHORS' CONCLUSIONS

There is no strong evidence for any single strategy to help healthcare professionals to recruit participants in research studies. Additional visits or information did not appear to increase recruitment by healthcare professionals. The most promising strategies appear to be those with a dedicated resource (e.g. a clinical recruiter or automated alert system) for identifying suitable participants that reduced the demand on healthcare professionals, but these were assessed in studies at high risk of bias.

International consensus on use of focused ultrasound for painful bone metastases: Current status and future directions

Focused ultrasound surgery (FUS), in particular magnetic resonance guided FUS (MRgFUS), is an emerging non-invasive thermal treatment modality in oncology that has recently proven to be effective for the palliation of metastatic bone pain. A consensus panel of internationally recognised experts in focused ultrasound critically reviewed all available data and developed consensus statements to increase awareness, accelerate the development, acceptance and adoption of FUS as a treatment for painful bone metastases and provide guidance towards broader application in oncology. In this review, evidence-based consensus statements are provided for (1) current treatment goals, (2) current indications, (3) technical considerations, (4) future directions including research priorities, and (5) economic and logistical considerations.

The National Cancer Institute-American Society of Clinical Oncology Cancer Trial Accrual Symposium: summary and recommendations

INTRODUCTION

Many challenges to clinical trial accrual exist, resulting in studies with inadequate enrollment and potentially delaying answers to important scientific and clinical questions.

METHODS

The National Cancer Institute (NCI) and the American Society of Clinical Oncology (ASCO) cosponsored the Cancer Trial Accrual Symposium: Science and Solutions on April 29-30, 2010 to examine the state of accrual science related to patient/community, physician/provider, and site/organizational influences, and identify new interventions to facilitate clinical trial enrollment. The symposium featured breakout sessions, plenary sessions, and a poster session including 100 abstracts. Among the 358 attendees were clinical investigators, researchers of accrual strategies, research administrators, nurses, research coordinators, patient advocates, and educators. A bibliography of the accrual literature in these three major areas was provided to participants in advance of the meeting. After the symposium, the literature in these areas was revisited to determine if the symposium recommendations remained relevant within the context of the current literature.

RESULTS

Few rigorously conducted studies have tested interventions to address challenges to clinical trials accrual. Attendees developed recommendations for improving accrual and identified priority areas for future accrual research at the patient/community, physician/provider, and site/organizational levels. Current literature continues to support the symposium recommendations.

CONCLUSIONS

A combination of approaches addressing both the multifactorial nature of accrual challenges and the characteristics of the target population may be needed to improve accrual to cancer clinical trials. Recommendations for best practices and for future research developed from the symposium are provided.

New Considerations in the Design of Clinical Trials for Bone Metastases

Palliative radiotherapy (RT) is prescribed to patients with bone metastases to alleviate symptoms and improve quality of life. The lack of consistent endpoints for such trials has made cross study comparison difficult and has led to contradictory conclusions. The International Bone Metastases Consensus Working Party was established to create a standard set of endpoints and recommendations for future clinical trials. Recommendations were included regarding eligibility criteria, pain assessments, follow-up assessments, timing, as well as radiation techniques. Suggestions were also made to facilitate the ease with which different studies could be compared as well as to encourage widespread consistency in certain aspects of trial design. Investigators conducting clinical trials in bone metastases should continue to adopt these recommendations to ensure consistent guidelines based on the most recent literature.

Poor Accrual in Palliative Research Studies: An Update From the Rapid Response Radiotherapy Program

Background

In June 2003, the Rapid Response Radiotherapy Program (RRRP) implemented changes to recruitment strategies in attempts to increase patient accrual to research studies. Such modifications included the use of a dedicated research assistant to screen for and identify eligible study patients, the introduction of more appropriate inclusion criteria, and the switch towards telephone interviews to minimize patient burden. The purpose of this study is to provide an update on patient accrual in the RRRP.

Methods

All patients seen in the RRRP from January 2002 to December 2009 were recorded in a prospective database. Reasons for referral, eligibility for clinical trials, reasons for non-accrual, and various demographics information were recorded. Descriptive statistics summarized findings.

Results

A total of 4726 patient visits were recorded from January 1st, 2002 to December 31st, 2009. Prior to changes, the overall rate of accrual into research studies was 14.9% versus 48.1% after changes were implemented. Patients were not accrued onto studies mainly to due ineligibility according to study protocol. Other reasons such as language barrier (12.1%), physician objection (3.5%), patient declining participation (11.3%) and lack of a research assistant (9.3%) were cited.

Conclusions

Changes in clinical structure and study design can significantly impact accrual patterns in palliative radiotherapy studies. Despite these changes however, the majority of patients are still not enrolled in studies. Therefore additional efforts need to be made to maximize patient accrual and minimize attrition.

Factors associated with attrition from a randomized controlled trial of meaning-centered group psychotherapy for patients with advanced cancer

OBJECTIVE

The generalizability of palliative care intervention research is often limited by high rates of study attrition. This study examined factors associated with attrition from a randomized controlled trial comparing meaning-centered group psychotherapy (MCGP), an intervention designed to help advanced cancer patients sustain or enhance their sense of meaning to the supportive group psychotherapy (SGP), a standardized support group.

METHODS

Patients with advanced solid tumor cancers (n = 153) were randomized to eight sessions of either the MCGP or SGP. They completed assessments of psychosocial, spiritual, and physical well-being pretreatment, midtreatment, and 2 months post-treatment. Attrition was assessed in terms of the percent of participants who failed to complete these assessments, and demographic, psychiatric, medical, and study-related correlates of attrition were examined for the participants in each of these categories.

RESULTS

The rates of attrition at these time points were 28.1%, 17.7%, and 11.1%, respectively; 43.1% of the participants (66 of 153) completed the entire study. The most common reason for dropout was patients feeling too ill. Attrition rates did not vary significantly between study arms. The participants who dropped out pretreatment reported less financial concerns than post-treatment dropouts, and the participants who dropped out of the study midtreatment had poorer physical health than treatment completers. There were no other significant associations between attrition and any demographic, medical, psychiatric, or study-related variables.

CONCLUSIONS

These findings highlight the challenge of maintaining advanced cancer patients in longitudinal research and suggest the need to consider alternative approaches (e.g., telemedicine) for patients who might benefit from group interventions but are too ill to travel.

Update of the international consensus on palliative radiotherapy endpoints for future clinical trials in bone metastases

PURPOSE

To update the international consensus on palliative radiotherapy endpoints for future clinical trials in bone metastases by surveying international experts regarding previous uncertainties within the 2002 consensus, changes that may be necessary based on practice pattern changes and research findings since that time.

METHODS AND MATERIALS

A two-phase survey was used to determine revisions and new additions to the 2002 consensus. A total of 49 experts from the American Society for Radiation Oncology, the European Society for Therapeutic Radiology and Oncology, the Faculty of Radiation Oncology of the Royal Australian and New Zealand College of Radiologists, and the Canadian Association of Radiation Oncology who are directly involved in the care of patients with bone metastases participated in this survey.

RESULTS

Consensus was established in areas involving response definitions, eligibility criteria for future trials, reirradiation, changes in systemic therapy, radiation techniques, parameters at follow-up, and timing of assessments.

CONCLUSION

An outline for trials in bone metastases was updated based on survey and consensus. Investigators leading trials in bone metastases are encouraged to adopt the revised guideline to promote consistent reporting. Areas for future research were identified. It is intended for the consensus to be re-examined in the future on a regular basis.