The global conduct of cancer clinical trials: challenges and opportunities

Global patterns of hemophilia drug trials, hemophilia care, and health care measures

Background

Drug trials are vital to establish safe and effective treatments for congenital hemophilia, a bleeding disorder that affects about 800,000 males worldwide. The global distribution of hemophilia drug trials (HDTs) and their alignment with hemophilia care is unknown.

Objectives

This study aimed to evaluate the global distribution of HDTs and its association with hemophilia care.

Methods

In this cross-sectional study, HDTs conducted between 2007 and 2022 were selected from the clinicaltrials.gov database. The density of trials per 1000 expected males with hemophilia (eMwH) was assessed according to hemophilia care measures (factor VIII and IX utilization per 1000 eMwH) derived from World Federation of Hemophilia data.

Results

Among 124 trials, 55 countries were represented, with an average of 7.9 countries per trial. Most HDT sites were in high-income (74.4%) or upper middle (20.1%)-income countries. The number of sites in lower-middle-income countries doubled, from 12 in 2007-2011 to 30 in 2017-2022-a nonsignificant increase from 5.8% to 7.0% (P = .53). Factor utilization was substantially reduced in lower-middle (0.4 international units [IUs] per 1000 eMwH) and upper middle (2.8 IUs per 1000 eMwH) compared with high (6.8 IUs per 1000 eMwH) income countries. HDT density was moderately correlated with factor usage (r = 0.436; P ≤ .001).

Conclusion

Most HDT sites were located in high-income countries, although a substantial proportion were in upper middle-income countries. A small but increasing number of trials were conducted in lower-middle-income countries, where factor usage is relatively low. This study provides evidence on the global distribution of HDT and raises questions regarding the generalizability, barriers, opportunities, and ethics of trials for a rare bleeding disorder.

Globalization of clinical research in oncology: Status, challenges, and future directions

PURPOSE

Cancer is the second-leading cause of death worldwide, and its burden is increasing around the world, particularly in low- and middle-income countries (LMICs). Yet, cancer research has historically been conducted primarily in high-income countries (HICs).

METHODS

In this review, we describe the results of our literature search into the current state of international cancer trials, including the benefits, challenges, limitations, and ethical concerns regarding the international conduct of HIC-led trials. We also propose some possible means of addressing these challenges and overcoming these barriers to extend the benefits of cancer research to people around the world.

RESULTS

Over the last several decades, there has been a shift toward inclusion of investigators and participants from LMICs in pivotal cancer clinical trials.

CONCLUSIONS

While inclusion of LMIC countries has benefits, including increased diversity of participant populations, investment in research infrastructure in LMICs, and potential expansion of cancer treatment options around the world, the continued leadership of most trials by HICs presents ethical concerns, including potential exploitation of researchers and participants from LMICs, lack of focus on cancer types prevalent in all participating regions, and disparities in access to approved therapies once the trial is complete.

Analysis of registered clinical trials in Italy regarding dermatology (2003-2022): a cross-sectional study on historical trend and prospects for industry investments

BACKGROUND

This cross-sectional analysis intends to evaluate trend and outlook of industry clinical research in Italy regarding dermatology and its prospects for the next few years.

METHODS

A computerized search of ClinicalTrial.gov database was carried out considering the 20-year period 2003-2022 using the following string: "Skin Diseases OR Skin cancer OR Skin Neoplasms OR Skin Infection OR Skin Lesion OR Skin Ulcer OR Skin Laxity OR Skin toxicity OR Dermatologic Complication OR Skin abnormalities".

RESULTS

During the last 20 years 690 Industry Clinical Trials (IndCTs) were conducted in Italy regarding dermatological investigations, almost entirely funded by non-Italian pharmaceutical companies, involving 4497 centers, and recruiting an average of 13.0 subjects per site. The number of controlled and randomized studies has grown quite regularly and in the last 5 years they represented 79.6% of IndCTs initiated. Countries most frequently sharing with Italy international protocols were Spain (75.0%), Germany (71.8%), France (68.5%), the USA (67.4%), and the UK (54.8%). These data point to a historical involvement of Italy in dermatology IndCTs lower than in the major European countries. However, the war in Ukraine has deprived IndCTs of the contribution of Russia, Ukraine, and Belarus, meaning a mean of about 40 new IndCTs per year in a population of 200 million inhabitants. In contrast, many indicators point to Italy as a country with potential in dermatology wider than used in the past: an efficient health care system accessible to any citizen or resident, 4.6 million dermatological interventions per year, low density of IndCTs concerning dermatology, good production of scientific papers in indexed medical journals, relatively low cost of services and labour and geopolitical stability.

CONCLUSIONS

The European Clinical Trials Information System's (CTIS), mandatory for the EU member states since early 2023 allows common, simplified, and harmonized regulatory procedures over the life cycle of clinical trials in Europe (EMA, 2023) and plays in favor of Italy's greater competitiveness in clinical research.

Proceedings from the First Onco Summit: LATAM Chapter, 19-20 May 2023, Rio de Janeiro, Brazil

The Onco Summit 2023: The Latin American (LATAM) Chapter took place over two days, from 19-20 May 2023, in Brazil. The event aimed to share the latest updates across various oncology disciplines, address critical clinical challenges, and exchange best practices to ensure optimal patient treatment. More than 30 international and regional speakers and more than 300 oncology specialists participated in the Summit. The Summit discussions centered on common challenges and therapeutic advances in cancer care, with a specific focus on the unique obstacles faced in LATAM and examples of adaptable strategies to address these challenges. The Summit also facilitated the establishment of a network of oncologists, hematologists, and scientists in LATAM, enabling collaboration to improve cancer care, both in this region and globally, through drug development and clinical research. This report summarizes the key discussions from the Summit for the global and LATAM oncology community.

Clinical Trials in Gastroesophageal Cancers: An Analysis of the Global Landscape of Interventional Trials From ClinicalTrials.gov

PURPOSE

To describe the global landscape of clinical research into interventions for gastroesophageal cancers (GECs), with examination of trial characteristics, geographic distribution of trial sites, and factors associated with trial termination.

METHODS

We queried ClinicalTrials.gov to identify all completed or terminated phase III interventional studies investigating GECs (esophageal squamous cell carcinoma [ESCC], esophageal adenocarcinoma [EAC], gastroesophageal junctional [GEJ], and gastric adenocarcinoma). Data on all reported trial characteristics were extracted. Pearson's chi-square and Fisher's exact tests were used to compare differences in completed and terminated trials. Multivariate logistic regression evaluated predictors of termination.

RESULTS

A total of 179 trials were identified; of these, 90% were therapeutic. Most included sites in Asia (61%) and Europe (32%); few included sites in Africa (4%). Thirty percent included sites in low- and middle-income countries (LMICs). Most (70%) focused on gastric or GEJ adenocarcinoma, 13% on EAC and ESCC, and 9% on ESCC alone. Sixteen percent (n = 29) of trials terminated prematurely. In multivariate analysis, study site number, location of recruitment sites, and patient population emerged as predictors of termination. Trials recruiting from US-based sites were more likely to terminate (odds ratio [OR], 7.22 [95% CI, 1.59 to 32.69]). Trials conducted exclusively in LMICs were less likely to terminate (OR, 0.04 [95% CI, 0.01 to 0.59] v conducted in high-income countries [HICs] alone). Studies on ESCC were more likely to terminate (OR, 17.74 [95% CI, 1.49 to 210.69]).

CONCLUSION

Although 80% of GECs occur in LMICs, trial activity disproportionately occurs in HICs. Few trials focus on EAC/ESCC despite being highly fatal, highlighting an unmet need. Overall, this study highlights (1) a missed opportunity to recruit patients from high-incidence regions globally; and (2) a pressing need for increasing funding, infrastructure, and support for GEC trials in LMICs.

Operational complexities in international clinical trials: a systematic review of challenges and proposed solutions

OBJECTIVE

International trials can be challenging to operationalise due to incompatibilities between country-specific policies and infrastructures. The aim of this systematic review was to identify the operational complexities of conducting international trials and identify potential solutions for overcoming them.

DESIGN

Systematic review.

DATA SOURCES

Medline, Embase and Health Management Information Consortium were searched from 2006 to 30 January 2023.

ELIGIBILITY CRITERIA

All studies reporting operational challenges (eg, site selection, trial management, intervention management, data management) of conducting international trials were included.

DATA EXTRACTION AND SYNTHESIS

Search results were independently screened by at least two reviewers and data were extracted into a proforma.

RESULTS

38 studies (35 RCTs, 2 reports and 1 qualitative study) fulfilled the inclusion criteria. The median sample size was 1202 (IQR 332-4056) and median number of sites was 40 (IQR 13-78). 88.6% of studies had an academic sponsor and 80% were funded through government sources. Operational complexities were particularly reported during trial set-up due to lack of harmonisation in regulatory approvals and in relation to sponsorship structure, with associated budgetary impacts. Additional challenges included site selection, staff training, lengthy contract negotiations, site monitoring, communication, trial oversight, recruitment, data management, drug procurement and distribution, pharmacy involvement and biospecimen processing and transport.

CONCLUSIONS

International collaborative trials are valuable in cases where recruitment may be difficult, diversifying participation and applicability. However, multiple operational and regulatory challenges are encountered when implementing a trial in multiple countries. Careful planning and communication between trials units and investigators, with an emphasis on establishing adequately resourced cross-border sponsorship structures and regulatory approvals, may help to overcome these barriers and realise the benefits of the approach. OPEN SCIENCE FRAMEWORK REGISTRATION NUMBER: osf-registrations-yvtjb-v1.

A Vision for Democratizing Next-Generation Oncology Clinical Trials

SUMMARY

Revolutionary advancements in oncology have transformed lives, but the clinical trials ecosystem encounters challenges, including restricted access to innovative therapies and a lack of diversity in participant representation. A vision emerges for democratized, globally accessible oncology trials, necessitating collaboration among researchers, clinicians, patients, and policymakers to shift from converting complex, exclusive trials into a dynamic, inclusive force against cancer.

Lipid metabolism and its implications in tumor cell plasticity and drug resistance: what we learned thus far?

Metabolic reprogramming, a hallmark of cancer, allows cancer cells to adapt to their specific energy needs. The Warburg effect benefits cancer cells in both hypoxic and normoxic conditions and is a well-studied reprogramming of metabolism in cancer. Interestingly, the alteration of other metabolic pathways, especially lipid metabolism has also grabbed the attention of scientists worldwide. Lipids, primarily consisting of fatty acids, phospholipids and cholesterol, play essential roles as structural component of cell membrane, signalling molecule and energy reserves. This reprogramming primarily involves aberrations in the uptake, synthesis and breakdown of lipids, thereby contributing to the survival, proliferation, invasion, migration and metastasis of cancer cells. The development of resistance to the existing treatment modalities poses a major challenge in the field of cancer therapy. Also, the plasticity of tumor cells was reported to be a contributing factor for the development of resistance. A number of studies implicated that dysregulated lipid metabolism contributes to tumor cell plasticity and associated drug resistance. Therefore, it is important to understand the intricate reprogramming of lipid metabolism in cancer cells. In this review, we mainly focused on the implication of disturbed lipid metabolic events on inducing tumor cell plasticity-mediated drug resistance. In addition, we also discussed the concept of lipid peroxidation and its crucial role in phenotypic switching and resistance to ferroptosis in cancer cells. Elucidating the relationship between lipid metabolism, tumor cell plasticity and emergence of resistance will open new opportunities to develop innovative strategies and combinatorial approaches for the treatment of cancer.

Oncology Clinical Trials in Greece: Progress in the Past Decade

Cancer is established as a major contributor to global burden as millions of deaths are reported every year. Advances in molecular, epidemiologic and clinical research have led to significant improvements in prevention, screening and treatment of tumors. The purpose of the study is to describe the progress of oncology clinical trials performed in Greece during the past decade and the obstacles that still need to be addressed in cancer research. A search was conducted in the public database EU Clinical Trials Register using the algorithm 'cancer AND Greece'. Results included relevant trials approved between 2010 and 2020. A total of 480 trials were approved for conduct in Greece from 2010 to 2020. The majority are multinational, phase III trials, exploring the efficacy and safety of agents in the management of lung cancer and multiple myeloma. A variety of small-molecules and monoclonal antibodies has and is being tested against key binding targets. Based on their promising effects on patients' responses and outcomes, many have been marketed for the treatment of several cancer types and are considered milestones in cancer discovery. It goes without saying that oncology research has made tremendous steps towards the development of potent and tolerable anticancer agents, with Greece having an active role. Current efforts focus on the use of alternative designs and tools aiming at further improving patients' survival and quality of life, while globalization of clinical research is also a matter of high importance.

Global Myeloma Trial Participation and Drug Access in the Era of Novel Therapies

PURPOSE

The globalization of clinical trials has accelerated recent advances in multiple myeloma (MM). However, it is unclear whether trial enrollment locations are reflective of the global burden of MM and whether access to novel therapies is timely and equitable for countries that participate in those trials.

METHODS

To assess this, we characterized where MM trials that led to US Food and Drug Administration (FDA) approvals were conducted and determined how often and quickly these drug regimens received approval in their participating trial countries on the basis of country income level and geographic region.

RESULTS

A systematic review was conducted to identify all MM clinical trials that met their primary endpoint, enrolled patients outside the United States, and resulted in FDA approval from 2005 to 2019. A total of 18 pivotal MM clinical trials were identified. High-income countries enrolled patients in 100% (18/18) of the trials identified, whereas upper-middle and lower-middle-income countries were represented in 61% (11/18) and 28% (5/18) of trials, respectively. No patients from low-income countries were enrolled. One trial enrolled patients in sub-Saharan Africa, and no trials enrolled patients in South Asia/Caribbean. For drugs/regimens that were approved in their participating countries, the median time from FDA approval to approval was 10.9 months. There were no drugs approved in lower-middle-income trial countries. MM trials leading to FDA approval are generally run in high-income, European, and Central Asian countries.

CONCLUSION

There are substantial disparities in where novel therapies are evaluated and where they are ultimately approved for use on the basis of income level and geography.

Lessons From Implementing a Clinical Research Network in Brazil

In this article, we discuss the strategy designed by a private oncology group to offer patients access to new technologies and treatments via a recently created research program, and we describe how the patient journey was the motivation for developing standard assistance flows and processes to integrate areas of care. The increase in Brazilians' life expectancy has raised the incidence of cancer, and it is now the second leading cause of death. Because it is a multifactorial disease, cancer treatment has several challenges. We elected to approach cancer research using a strategic program to obtain national attention and visibility. Starting in 2007, the initial project included three phases: phase I, diagnosis of units in major metropolitan areas; phase II, project design, with a central-office operation model; and phase III, implementation, with launch and integration of research activities at selected units. The foundation of the program was the construction of departmental and interdepartmental flows, standard operating processes, and guidelines (regulatory, ethical, legal, and financial). Recruitment of qualified professionals was another critical, successful determinant. The benefits of an additional central office include improved research-project distribution. Another advantage of the program is attracting and retaining trained professionals with alternative direct or indirect sources of revenue. We increased our corporate and academic partnerships, adhered to deadlines and noted an improvement in turnaround times, and we increased clinical staff engagement and motivation. Some barriers continue to challenge the program's continued expansion, including Brazilian regulatory authority approval, tax inefficiency, and a growing demand for qualified professionals. Research sites offering high-quality care are a reality in Brazil; they offer multiple lines of treatment in the public and private sectors.

Is Independent Clinical Research Possible in Low- and Middle-Income Countries? A Roadmap to Address Persistent and New Barriers and Challenges

Cancer is an increasing and significant problem for both high- and low- and middle-income countries. Basic, translational, and clinical research efforts have been instrumental in generating the outstanding improvements we have witnessed over the last few decades, answering important questions, and improving patient outcomes. Arguably, a substantial portion of currently ongoing research is sponsored by the pharmaceutical industy and specifically addresses questions under industry interests, most of which apply to high-income countries, leaving behind problems related to the much larger and underserved population of patients with cancer in low- and middle-income countries. In this scenario, discussing independent academic research is an important challenge, particularly for these countries. Although different countries and institutions face different problems while establishing independent research agendas, some generalizable barriers can be identified. A solid regulatory and ethical framework, a strong and sustainable technical supporting infrastructure, and motivated and experienced investigators are all paramount to build a viable and productive academic research program. Securing funding for research, although not the only hurdle, is certainly one of the most basic hurdles to overcome. Noticeably, and as an added impediment, public and governmental support for cancer research has been decreasing in high-income countries and is almost nonexistent in the rest of the world. We propose an initial careful diagnostic assessment of the research resource scenario of each institution/country and adjustment of the strategic development plan according to four different research resource restriction levels. Although not necessarily applicable to all situations, this model can be helpful if adjusted to each local or regional situation.

The Future of Clinical Trial Design in Oncology

Clinical trials represent a fulcrum for oncology drug discovery and development to bring safe and effective medicines to patients in a timely manner. Clinical trials have shifted from traditional studies evaluating cytotoxic chemotherapy in largely histology-based populations to become adaptively designed and biomarker-driven evaluations of molecularly targeted agents and immune therapies in selected patient subsets. This review will discuss the scientific, methodological, practical, and patient-focused considerations to transform clinical trials. A call to action is proposed to establish the framework for next-generation clinical trials that strikes an optimal balance of operational efficiency, scientific impact, and value to patients. SIGNIFICANCE: The future of cancer clinical trials requires a framework that can efficiently transform scientific discoveries to clinical utility through applications of innovative technologies and dynamic design methodologies. Next-generation clinical trials will offer individualized strategies which ultimately contribute to globalized knowledge and collective learning, through the joint efforts of all key stakeholders including investigators and patients.

An overview of primary registries of WHO's international clinical trial registry platform

Introduction:

WHO's International Clinical Trials Registry Platform (ICTRP) has 17 primary registries that collect the information on the minimum set of items of trial information that appear in the register and these registries are also endorsed by the International Committee of Medical Journal Editors.

Objective:

The objective of this study is to describe the profile of all the primary registries including Clinical Trial Registry‑India (CTRI), through features such as magnitude, domain of registration, flagging, audit trail, language, mandatory requirements, and result disclosure.

Methodology:

The profiling of all registries was based on countries and zones, year of establishment, registrant, flagging, conflict of interest, language, documents, result disclosure, type of study, mode of registration, mandate of registration, quality check method, individual patient data statement and translation of content facility. The mode of search used was online which included advanced search, basic search and also from the audio/video manual on their website.

Results:

There are 17 primary registries of ICTRP, the first one International Standard Randomised Controlled Trial Number (ISRCTN) of England being initiated in year 2000 and the most recent being Lebanese registry, in September 2019. The trials registered with these registries range from 301 in Cuba to 53972 in European union's EU Clinical Trials Register. The primary registries in WHO registry network are diverse in functionalities and practices. The characteristics of online registers vary in content and features and to achieve coordinated level of data quality, across all the different registries and to keep a balance in standards of the data collected and validation of that data, the registries are adhering to the minimum data set items laid down by ICTRP.

Conclusion:

The very process of registering the clinical studies helps in promoting the research methods and also raising the standards of research, especially among young researchers. It also helps in reducing the duplicity of research.

Trends in clinical trial investigator workforce and turnover: An analysis of the U.S. FDA 1572 BMIS database

Background

High turnover rates among clinical trial investigators contribute to inefficiency, instability, and increased costs for the clinical research enterprise; however, factors contributing to investigator turnover have not been well characterized.

Methods

Using information from the U.S. Food and Drug Administration's Bioresearch Monitoring Information System (BMIS), we examined trends in the overall clinical investigator workforce and within specific “phenotypes” as well as differences by investigator location (U.S.-based vs. non-U.S.-based). We identified unique investigators within the database, stratifying them into one of three “phenotypes”: those with one Form FDA1572 submission across the study interval (“one-and-done”); those with two or more submissions but with substantial intervals between trials (“stop-and-go”); and those with two or more submissions and continuous involvement in multiple trials (“stayers”).

Results

Of the 172,453 unique investigators who submitted a Form FDA 1572 during the study interval (1999–2015), 85,455 were classified as “one-and-done” investigators; 21,768 as “stop-and-go” investigators; and 65,231 as “stayer” investigators. The total number of investigators declined across the study interval. Among all subgroups, only “one-and-done” investigators showed growth across the study period, largely driven by increases in non-U.S.-based investigators. “Stop-and-go” investigators showed declines for both U.S.-based and non-U.S.-based investigators, as did “stayers,” who showed the largest absolute and proportional declines of all subgroups.

Conclusions

From 1999 to 2015, investigators submitting a Form FDA 1572 to the BMIS database declined by approximately one-third and the proportion of investigators involved in only one trial increased, signaling potential adverse trends in the clinical investigator workforce. Strategies for sustaining investigator engagement warrant further exploration.

Clinical Significance.•

High turnover rates among clinical trial investigators contribute to inefficiency, instability, and increased costs for the clinical research enterprise.

•

Using data from the FDA Bioresearch Monitoring Information System (BMIS), we identified 172,453 unique investigators who submitted a Form FDA 1572 during the study interval (1999–2015). Of these, 85,455 were classified as having done only a single study (“one-and-done” investigators); 21,768 as being intermittently involved in research activity (“stop-and-go” investigators); and 65,231 as investigators who were continuously involved in clinical research (“stayer” investigators).

•

From 1999 to 2015, investigators submitting a Form FDA 1572 to the BMIS database declined by approximately one-third and the proportion of investigators involved in only one trial increased, signaling potential adverse trends in the clinical investigator workforce.

Global Breast Cancer Research: Moving Forward

Breast cancer is a major global health problem and major cause of mortality. Although mortality trends are declining in high-income countries, trends are increasing in low- and middle-income countries (LMICs). Addressing global breast cancer research is a challenging endeavor, as notable disparities and extremely heterogeneous realities exist in different regions across the world. Basic global cancer health care needs have been addressed by the World Health Organization's (WHO) proposed list of essential medicines and by resource-stratified guidelines for screening and treatment. However, specific strategies are needed to address disparities in access to health care, particularly access to new therapies. Discussions about global research in breast cancer should take into account the ongoing globalization of clinical trials. Collaboration fostered by well-established research organizations in North America and Europe is essential for the development of infrastructure and human resources in LMICs so that researchers in these countries can begin to address regional questions. Specific challenges that impact the future of global breast cancer research include increasing the availability of trials in LMICs, developing strategies to increase patient participation in clinical trials, and creation of clear guidelines for the development of real-world evidence-based research. The main objective of this review is to encourage the discussion of challenges in global breast cancer research with the hope that collectively we will be able to generate workable proposals to advance the field.

Sampling: how to select participants in my research study?

Background

In this paper, the basic elements related to the selection of participants for a health research are discussed. Sample representativeness, sample frame, types of sampling, as well as the impact that non-respondents may have on results of a study are described. The whole discussion is supported by practical examples to facilitate the reader's understanding.

Objective

To introduce readers to issues related to sampling.

The Role of Clinical Trial Participation in Cancer Research: Barriers, Evidence, and Strategies

Fewer than one in 20 adult patients with cancer enroll in cancer clinical trials. Although barriers to trial participation have been the subject of frequent study, the rate of trial participation has not changed substantially over time. Barriers to trial participation are structural, clinical, and attitudinal, and they differ according to demographic and socioeconomic factors. In this article, we characterize the nature of cancer clinical trial barriers, and we consider global and local strategies for reducing barriers. We also consider the specific case of adolescents with cancer and show that the low rate of trial enrollment in this age group strongly correlates with limited improvements in cancer population outcomes compared with other age groups. Our analysis suggests that a clinical trial system that enrolls patients at a higher rate produces treatment advances at a faster rate and corresponding improvements in cancer population outcomes. Viewed in this light, the issue of clinical trial enrollment is foundational, lying at the heart of the cancer clinical trial endeavor. Fewer barriers to trial participation would enable trials to be completed more quickly and would improve the generalizability of trial results. Moreover, increased accrual to trials is important for patients, because trials provide patients the opportunity to receive the newest treatments. In an era of increasing emphasis on a treatment decision-making process that incorporates the patient perspective, the opportunity for patients to choose trial participation for their care is vital.

Leveraging the power of pooled data for cancer outcomes research

Background

Clinical trials continue to be the gold standard for determining the efficacy of novel cancer treatments, but they may also expose participants to the potential risks of unpredictable or severe toxicities. The development of validated tools that better inform patients of the benefits and risks associated with clinical trial participation can facilitate the informed consent process. The design and validation of such instruments are strengthened when we leverage the power of pooled data analysis for cancer outcomes research.

Main body

In a recent study published in the Journal of Clinical Oncology entitled “Determinants of early mortality among 37,568 patients with colon cancer who participated in 25 clinical trials from the adjuvant colon cancer endpoints database,” using a large pooled analysis of over 30,000 study participants who were enrolled in clinical trials of adjuvant therapy for early-stage colon cancer, we developed and validated a nomogram depicting the predictors of early cancer mortality. This database of pooled individual-level data allowed for a comprehensive analysis of poor prognostic factors associated with early death; furthermore, it enabled the creation of a nomogram that was able to reliably capture and quantify the benefit-to-risk profile for patients who are considering clinical trial participation. This tool can facilitate treatment decision-making discussions.

Conclusion

As China and other Asian countries continue to conduct oncology clinical trials, efforts to collate patient-level information from these studies into a large data repository should be strongly considered since pooled data can increase future capacity for cancer outcomes research, which, in turn, can enhance patient-physician discussions and optimize clinical care.

Determinants of Early Mortality Among 37,568 Patients With Colon Cancer Who Participated in 25 Clinical Trials From the Adjuvant Colon Cancer Endpoints Database

PURPOSE

Factors associated with early mortality after surgery and treatment with adjuvant chemotherapy in colon cancer are poorly understood. We aimed to characterize the determinants of early mortality in a large cohort of colon cancer trial participants.

METHODS

A pooled analysis of 37,568 patients in 25 randomized trials of adjuvant systemic therapy was conducted. Multivariable logistic regression models with several definitions of early mortality (30, 60, and 90 days, and 6 months) were constructed, adjusting for clinically and statistically significant variables. A nomogram for 6-month mortality was developed and validated.

RESULTS

Median age among patients was 61 years, patient demographics included 54% men and 90% White, 29% and 71% had stage II and III disease, respectively, and 79%, 20%, and 1% had an Eastern Cooperative Oncology Group performance status (PS) of 0, 1, and ≥ 2, respectively. Early mortality was low: 0.3% at 30 days, 0.6% at 60 days, 0.8% at 90 days, and 1.4% at 6 months. Of those patients who died by 6 months post-random assignment, 40% had documented disease recurrence prior to death. Early disease recurrence was associated with a markedly increased risk of death during the first 6 months post-treatment (hazard ratio, 82.6; 95%CI, 66.9 to 102.1). In prognostic analyses, advanced age, male sex, poorer PS, increasing ratio of positive to examined lymph nodes, earlier decade of enrollment, and higher tumor stage and grade predicted a greater likelihood of early mortality, whereas treatment received was not strongly predictive. A multivariable model for 6-month mortality showed strong optimism-adjusted discrimination (concordance index, 0.73) and calibration.

CONCLUSION

Early mortality was infrequent but more prevalent in patients with advanced age and a PS of ≥ 2, underscoring the need to carefully consider the risk-to-benefit ratio when making treatment decisions in these subgroups.

The Role of Clinical Trial Participation in Cancer Research: Barriers, Evidence, and Strategies

Fewer than one in 20 adult patients with cancer enroll in cancer clinical trials. Although barriers to trial participation have been the subject of frequent study, the rate of trial participation has not changed substantially over time. Barriers to trial participation are structural, clinical, and attitudinal, and they differ according to demographic and socioeconomic factors. In this article, we characterize the nature of cancer clinical trial barriers, and we consider global and local strategies for reducing barriers. We also consider the specific case of adolescents with cancer and show that the low rate of trial enrollment in this age group strongly correlates with limited improvements in cancer population outcomes compared with other age groups. Our analysis suggests that a clinical trial system that enrolls patients at a higher rate produces treatment advances at a faster rate and corresponding improvements in cancer population outcomes. Viewed in this light, the issue of clinical trial enrollment is foundational, lying at the heart of the cancer clinical trial endeavor. Fewer barriers to trial participation would enable trials to be completed more quickly and would improve the generalizability of trial results. Moreover, increased accrual to trials is important for patients, because trials provide patients the opportunity to receive the newest treatments. In an era of increasing emphasis on a treatment decision-making process that incorporates the patient perspective, the opportunity for patients to choose trial participation for their care is vital.