Reasons for non-uptake and subsequent participation in the NHS Bowel Cancer Screening Programme: a qualitative study

Effectiveness of health promotion interventions to increase faecal occult blood test uptake rates among older adults with an average-risk of colorectal cancer: A systematic review and meta-analysis

Objective

This review aims to examine the effectiveness of interventions in increasing faecal occult blood test (FOBT) uptake rates among older adults with an average-risk of colorectal cancer (CRC) and to identify essential components of such interventions based on current evidence.

Methods

Five databases were included in a systematic literature search for studies reporting randomized controlled trials (RCT) and interventions aimed at increasing FOBT uptake rates among average-risk individuals aged 50-75. Review Manager 5.4.1 was used for conducting meta-analyses and subgroup analyses.

Results

A meta-analysis of the 20 included studies demonstrated that health promotion interventions led to significant increases in FOBT uptake rates (odds ratio [OR] ​= ​1.55, 95% confidence interval (CI) ​= ​1.30-1.85; I 2 ​= ​95%). Provision of information, mailing of FOBT outreach, and reminders were identified as core components of promotion interventions to increase FOBT uptake rates. Among the different significant reminder strategies, a digital message (via text) plus telephone calls (automated and navigator-initiated) had a larger effect size than a telephone call alone. In addition, there was no significant evidence that financial incentives were associated with FOBT uptake. Most studies included a diverse mixture of components, but only a few studies utilized theoretical framework-based interventions.

Conclusions

Future studies with rigorous methodologies are warranted to examine the effectiveness and understand the mechanisms of theoretical framework-based multi-component educational programmes aimed at increasing FOBT uptake rates.

Systematic review registration

PROSPERO CRD42024520859.

Choice of colon capsule or colonoscopy versus default colonoscopy in FIT positive patients in the Danish screening programme: a parallel group randomised controlled trial

BACKGROUND

Colonoscopy is among the standard tests for colorectal cancer (CRC) screening. However, uptake varies, and alternatives such as colon capsule endoscopy (CCE) are available. The uptake and detection rate of clinically significant neoplasia with CCE, compared with colonoscopy, remain unclear in this setting.

OBJECTIVE

The primary objective of this study was to compare the detection rates of advanced neoplasia between CCE and colonoscopy, using a pathway in which the study group could choose between the two procedures, while the control group was offered only colonoscopy.

DESIGN

A randomised, intention-to-treat trial was conducted among Danish CRC screening participants who tested positive with a faecal immunochemical test (FIT). The trial compared the detection rate of advanced neoplasia (primary outcome) and the uptake rate of both approaches between the two arms.

RESULTS

A total of 473 684 invitations were sent to 396 676 individuals, with 62.6% returning the test. Among them, 11 075 tests were positive (4.5%), with no significant differences between the two study groups. Among FIT-positive cases, the uptake for colonoscopy was 91.1% in the control arm and 91.7% in the study arm, where participants had a choice of methods. In the study arm, 45.8% preferred CCE, 11.4% preferred colonoscopy and 42.8% had no preference and underwent colonoscopy. Ultimately, 69.9% of patients who initially opted for CCE were later referred for colonoscopy. The rate of advanced neoplasia detection was similar between the groups: 0.67% in the study arm versus 0.64% in the control arm.

CONCLUSION

Offering CCE as an alternative to colonoscopy did not significantly alter the detection rate of advanced neoplasia, nor did it increase uptake in a screening programme with high adherence to colonoscopy following a positive FIT test. Instead, it led to a very high rate of secondary colonoscopies. Therefore, CCE cannot be recommended in this setting.

TRIAL REGISTRATION NUMBER

NCT04049357 (ClinicalTrials.gov).

NHS-Galleri trial: Enriched enrolment approaches and sociodemographic characteristics of enrolled participants

BACKGROUND/AIMS

Certain sociodemographic groups are routinely underrepresented in clinical trials, limiting generalisability. Here, we describe the extent to which enriched enrolment approaches yielded a diverse trial population enriched for older age in a randomised controlled trial of a blood-based multi-cancer early detection test (NCT05611632).

METHODS

Participants aged 50-77 years were recruited from eight Cancer Alliance regions in England. Most were identified and invited from centralised health service lists; a dynamic invitation algorithm was used to target those in older and more deprived groups. Others were invited by their general practice surgery (GP-based Participant Identification Centres in selected regions); towards the end of recruitment, specifically Asian and Black individuals were invited via this route, as part of a concerted effort to encourage enrolment among these individuals. Some participants self-referred, often following engagement activities involving community organisations. Enrolment took place in 11 mobile clinics at 151 locations that were generally more socioeconomically deprived and ethnically diverse than the England average. We reduced logistical barriers to trial participation by offering language interpretation and translation and disabled access measures. After enrolment, we examined (1) sociodemographic distribution of participants versus England and Cancer Alliance populations, and (2) number needed to invite (NNI; the number of invitations sent to enrol one participant) by age, sex, index of multiple deprivation (IMD) and ethnicity, and GP surgery-level bowel screening participation.

RESULTS

Approximately 1.5 million individuals were invited and 142,924 enrolled (98% via centralised health service lists/invitation algorithm) in 10.5 months. The enrolled population was older and more deprived than the England population aged 50-77 years (73.3% vs 56.8% aged 60-77 years; 42.3% vs 35.3% in IMD groups 1-2). Ethnic diversity was lower in the trial than the England population (1.4% vs 2.8% Black; 3.3% vs 5.3% Asian). NNI was highest in Black (32.8), Asian (28.2) and most-deprived (21.5) groups, and lowest in mixed ethnicity (8.1) and least-deprived (4.6) groups.

CONCLUSIONS

Enrolment approaches used in the NHS-Galleri trial enabled recruitment of an older, socioeconomically diverse participant population relatively rapidly. Compared with the England and Cancer Alliance populations, the enrolled population was enriched for those in older age and more deprived groups. Better ethnicity data availability in central health service records could enable better invitation targeting to further enhance ethnically diverse recruitment. Future research should evaluate approaches used to facilitate recruitment from underrepresented groups in clinical trials.

Leveling up: Treating Uptake as Endogenous May Increase the Value of Screening Programs

BackgroundWe aimed to illustrate that health economists should consider individual heterogeneity when solving the problem of finding the optimal combination of sensitivity and specificity that maximizes the average health utility of a target population in a screening program.MethodsA theoretical framework compares the solution under standard economics of diagnoses to the optimal combination under an endogenous uptake analysis, where screening participation is given by heterogenous health preferences. An applied example used calibrated parameters with real data from the bowel cancer screening program in the United Kingdom. Scenario analyses show how the results would change with parameter values, if disease risk and health utilities were not independent and if screening uptake were not completely determined by health preferences.ResultsA general theoretical result states that the endogenous uptake analysis leads to a weakly higher true- and false-positive rate than would be optimal under the standard approach. In the same way, the endogenous solution would lead to a lower uptake rate. The base-case scenario of the applied example illustrates that a screening program using the endogenous solution would generate 21.1% more quality-adjusted life-years than when using the standard solution. The scenario analyses show when the endogenous analysis is most valued and that the general result applies for a wide range of situations when theoretical assumptions are relaxed.LimitationsThe results obtained are valid under the assumptions made. Analysts should evaluate if those could hold in the applied screening context.ConclusionsIndividual heterogeneity and uptake decisions are relevant factors to consider in the problem of finding an optimal combination of sensitivity and specificity for a screening test.HighlightsThe value of screening programs can be higher if heterogeneity of preferences in the target population is considered.The optimal operation of a screening test depends on health utilities of the target population and on the heterogeneity of these health utilities.Under heterogeneity of health utilities, the optimal operation of a screening test does not maximize screening uptake.A general theoretical result states that the endogenous uptake analysis leads to a weakly higher true- and false-positive rate than would be optimal under a standard approach; this is true for a wide range of situations.

Faecal Volatile Organic Compounds to Detect Colorectal Neoplasia in Lynch Syndrome-A Prospective Longitudinal Multicentre Study

BACKGROUND

Non-invasive biomarkers may reduce post-colonoscopy colorectal cancer (CRC) rates and colonoscopy overuse in Lynch syndrome. Unlike faecal immunochemical test (FIT), faecal volatile organic compounds (VOCs) may accurately detect both advanced and non-advanced colorectal neoplasia.

AIM

The aim of this study was to evaluate the potential of faecal VOCs-separately and with FIT-to guide optimal colonoscopy intervals in Lynch syndrome.

METHODS

Prospective longitudinal multicentre study in which individuals with Lynch syndrome collected faeces before and after high-quality surveillance colonoscopy. VOC-patterns were analysed using field asymmetric ion mobility spectrometry (FAIMS) and gas chromatography-ion mobility spectrometry (GC-IMS) followed by machine learning pipelines, and combined with FIT at 2.55 μg Hb/g faeces. Gas chromatography time-of-flight mass spectrometry analysed individual VOC abundance.

RESULTS

Among 200 included individuals (57% female, median 51 years), 62 had relevant neoplasia at colonoscopy: 3 CRC, 6 advanced adenoma (AA), 3 advanced serrated lesion (ASL), and 50 non-advanced adenoma (NAA). Respective sensitivity and negative predictive value for CRC and AA (and also ASL in case of FAIMS) were 100% and 100% using FAIMS (54% specificity), and 89% and 99% using GC-IMS (58% specificity). Respective sensitivity and specificity for any relevant neoplasia were 88% and 44% (FAIMS) and 84% and 28% (GC-IMS); accuracy did not significantly improve upon VOC-FIT. VOC-patterns differed before and after polypectomy (AUC 0.70). NAA showed decreased faecal abundance of butanal, 2-oxohexane, dimethyldisulphide and dimethyltrisulphide.

CONCLUSIONS

In Lynch syndrome, faecal VOCs may be a promising strategy for postponing colonoscopy and for follow-up after polypectomy. Our results serve as a stepping stone for large validation studies.

TRIAL REGISTRATION

NL8749.

Serum biomarkers REG1A and REG3A combined with the traditional CEA represent a novel nomogram for the screening and risk stratification of colorectal cancer

BACKGROUND

To develop and validate a serum protein nomogram for colorectal cancer (CRC) screening.

METHODS

The serum protein characteristics were extracted from an independent sample containing 30 colorectal cancer and 12 polyp tissues along with their paired samples, and different serum protein expression profiles were validated using RNA microarrays. The prediction model was developed in a training cohort that included 1345 patients clinicopathologically confirmed CRC and 518 normal participants, and data were gathered from November 2011 to January 2017. The lasso logistic regression model was employed for features selection and serum nomogram building. An internal validation cohort containing 576 CRC patients and 222 normal participants was assessed.

RESULTS

Serum signatures containing 27 secreted proteins were significantly differentially expressed in polyps and CRC compared to paired normal tissue, and REG family proteins were selected as potential predictors. The C-index of the nomogram1 (based on Lasso logistic regression model) which contains REG1A, REG3A, CEA and age was 0.913 (95% CI, 0.899 to 0.928) and was well calibrated. Addition of CA199 to the nomogram failed to show incremental prognostic value, as shown in nomogram2 (based on logistic regression model). Application of the nomogram1 in the independent validation cohort had similar discrimination (C-index, 0.912 [95% CI, 0.890 to 0.934]) and good calibration. The decision curve (DCA) and clinical impact curve (ICI) analysis demonstrated that nomogram1 was clinically useful.

CONCLUSIONS

This study presents a serum nomogram that included REG1A, REG3A, CEA and age, which can be convenient for screening of colorectal cancer.

Exploring Whether and How People Experiencing High Deprivation Access Diagnostic Services: A Qualitative Systematic Review

INTRODUCTION

To contribute to addressing diagnostic health inequalities in the United Kingdom, this review aimed to investigate determinants of diagnostic service use amongst people experiencing high deprivation in the United Kingdom.

METHODS

A systematic review was conducted using three databases (EBSCO, Web of Science and SCOPUS) to search studies pertaining to diagnostic service use amongst people experiencing high deprivation. Search terms related to diagnostics, barriers and facilitators to access and deprivation. Articles were included if they discussed facilitators and/or barriers to diagnostic service access, contained participants' direct perspectives and focussed on individuals experiencing high deprivation in the United Kingdom. Articles were excluded if the full text was unretrievable, only abstracts were available, the research did not focus on adults experiencing high deprivation in the United Kingdom, those not including participants' direct perspectives (e.g., quantitative studies) and papers unavailable in English.

RESULTS

Of 14,717 initial papers, 18 were included in the final review. Determinants were grouped into three themes (Beliefs and Behaviours, Emotional and Psychological Factors and Practical Factors), made up of 15 sub-themes. These were mapped to a conceptual model, which illustrates that Beliefs and Behaviours interact with Emotional and Psychological Factors to influence Motivation to access diagnostic services. Motivation then influences and is influenced by Practical Factors, resulting in a Decision to Access or Not. This decision influences Beliefs and Behaviours and/or Emotional and Psychological Factors such that the cycle begins again.

CONCLUSION

Decision-making regarding diagnostic service use for people experiencing high deprivation in the United Kingdom is complex. The conceptual model illustrates this complexity, as well as the mediative, interactive and iterative nature of the process. The model should be applied in policy and practice to enable understanding of the factors influencing access to diagnostic services and to design interventions that address identified determinants.

PATIENT OR PUBLIC CONTRIBUTION

Consulting lived experience experts was imperative in understanding whether and how the existing literature captures the lived experience of those experiencing high deprivation in South England. The model was presented to lived experience experts, who corroborated findings, highlighted significant factors for them and introduced issues that were not identified in the review.

Lack of social support, gender and colorectal cancer screening participation across Europe: How do screening programmes mitigate the effect of social support for men and women?

This study investigates how a lack of social support differentially affects men and women's colorectal cancer (CRC) screening participation, considering different screening strategies implemented across European countries. Although health sociology has stressed gender differences in social support and its effects on health behaviours, this was overlooked by cancer screening research. Using a data set of 65,961 women and 55,602 men in 31 European countries, we analysed the effect of social support variables on CRC screening uptake. We found that living alone and lower perceived social support were associated with lower screening uptake for both men and women. These effects were, however, stronger among men. Population-based screening programmes mitigated these effects, particularly for women, but not for men living alone. In countries with opportunistic screening programmes, social support variables remained associated with screening uptake. We conclude that cancer screening interventions should pay attention to social support and its gender-differentiated effects.

Comparing a fecal immunochemical test and circulating tumor DNA blood test for colorectal cancer screening adherence

BACKGROUND AND AIM

Colorectal cancer (CRC) screening programs are most effective at reducing disease incidence and mortality through sustained screening participation. A novel blood test modality is being explored for CRC screening, but it is unclear whether it will provide sustained screening participation. This study aimed to investigate whether a circulating tumor DNA (ctDNA) blood test improved CRC screening re-participation when compared with a fecal immunochemical test (FIT) and to define the predictors of sustained CRC screening in an Australian population.

METHODS

South Australians who initially participated in CRC screening using a ctDNA blood test (n = 36) or FIT (n = 547) were offered the same CRC screening test approximately 2 years later through an extended phase of a randomized controlled trial. Surveys collected demographic, psychosocial, and clinical information. Predictors of CRC screening re-participation were explored using chi-square, Wilcoxon tests, and logistic regression.

RESULTS

Participants offered a second ctDNA blood test were equally likely to re-participate in CRC screening as those who completed a FIT in the first round and who were offered the same test (61% vs 66% re-participation respectively, P = 0.6). CRC fatalism, health activation, and self-efficacy were associated with repeated screening participation. Test awareness was predictive of repeated FIT-based CRC screening.

CONCLUSIONS

Targeted interventions to improve CRC screening awareness and increase patient health activation may improve CRC screening adherence. A ctDNA blood test may be a suitable CRC screening option to maintain CRC screening adherence in people who do not participate in screening with FIT.

Didactic and narrative persuasion: An experiment to promote colorectal cancer screening

We tested whether a didactic and a narrative video (i.e. educational content and personal stories versus irrelevant information) could boost colorectal cancer (CRC) screening intention directly and through cognitive predictors of CRC screening behavior. We also tested whether exposure to a story changed participants' affective forecasting, reducing the perception of negative emotions associated with CRC screening (disgust, embarrassment, and fear). The study was conducted online with a between-participants design and recruiting a convenience sample (N = 375). We found that, compared with watching the control video, being exposed to the narrative video about CRC screening was indirectly associated with greater screening intention via vicarious experience and positive attitudes, whereas watching the didactic video was positively associated with CRC screening intention only among participants who had received an invitation letter but did not get screened, and among those yet to receive an invitation to screen. In the latter group, screening intention was boosted through positive attitudes. Our findings do not confirm that stories change affective forecasting, but narration likely fosters messages acceptance through vicarious experience. We also found support for the effectiveness of physicians' recommendations in promoting CRC screening, an intervention that might be effectively administered through a generalized, cost-effective video.

Social determinants and participation in fecal occult blood test based colorectal cancer screening: A qualitative systematic review and meta-synthesis

ISSUE ADDRESSED

Colorectal cancer (CRC) screening through fecal occult blood testing (FOBT) has saved thousands of lives globally with multiple countries adopting comprehensive population wide screening programs. Participation rates in FOBT based CRC screening for the socially and economically disadvantaged remains low. The aim of this systematic review is to explore empirical evidence that will guide targeted interventions to improve participation rates within priority populations.

METHODS

PubMed, Embase, Scopus, Cinahl and PsycInfo were systematically searched from inception to 22 June 2022. Eligible studies contained qualitative evidence identifying barriers to FOBT based CRC screening for populations impacted by the social determinants of health. An inductive thematic synthesis approach was applied using grounded theory methodology, to explore descriptive themes and interpret these into higher order analytical constructs and theories.

RESULTS

A total of 8,501 publications were identified and screened. A total of 48 studies from 10 countries were eligible for inclusion, representing 2,232 subjects. Coding within included studies resulted in 30 key descriptive themes with a thematic frequency greater than 10%. Coded themes applied to four overarching, interconnected barriers driving inequality for priority populations: social, behavioural, economic and technical/interfaces. SO WHAT?: This study has highlighted the need for stronger patient/provider relationships to mitigate barriers to FOBT screening participation for diverse groups. Findings can assist health professionals and policy makers address the systemic exclusion of priority populations in cancer screening by moving beyond the responsibility of the individual to a focus on addressing the information asymmetry driving low value perceptions.

Psychosocial Predictors of Colorectal Cancer Screening Intention: An Experiment on the Invitation Letter

BACKGROUND

In Italy, attendance rates for colorectal cancer (CRC) screening are suboptimal. The present work analysed cognitive and emotional predictors of CRC screening intention and tested an intervention on a real invitation letter to improve CRC screening intention, both directly and in interaction with the predictors of our model.

METHODS

Our model included variables from the theory of planned behaviour and the emotional barriers to bowel screening scale. We applied six changes to an invitation letter used in Italy to avoid the repetition of words like 'faeces', 'blood', or 'occult' and reduce the prompting of disgust. The 228 participants were randomly assigned to a between-participants design (original letter vs. manipulated letter).

RESULTS

Disgust hindered CRC screening intention, while embarrassment, fear, and subjective norms (i.e., perception of the social pressures to attend CRC screening) were not associated with intention to screen. More positive attitudes towards CRC screening were associated with a higher intention to screen. The positive association between perceived behavioural control and CRC screening intention was stronger for participants who read the letter with fewer (vs. more) references to bodily waste. Letter manipulation did not affect intention to screen.

CONCLUSIONS

The disgust associated with faecal matter is a critical factor in determining CRC screening attendance, and it should be acknowledged as such in public policies. Until new screening tests avoiding the activation of this emotional reaction are concretely available, public campaigns should improve CRC screening participation by boosting both positive attitudes towards screening and patients' perceived behavioural control.

Knowledge, Compliance, and Inequities in Colon Cancer Screening in Spain: An Exploratory Study

In Spain, inequities exist in implementing colorectal cancer (CRC) tests with the target population-adults aged 50 to 69-as part of population-based CRC screening programs. This research aims to further our understanding of the target population's awareness, attitudes, and perceptions of these test-based screening programs. A survey was carried out using an online panel representative of the target population, with a sample collected from 5313 individuals. Data collection took place in June 2022. Descriptive and bivariate analyses were carried out using contingency tables, the Chi-square test, and Cramer's V statistics. The sample was also segmented based on key variables. Finally, the results were analyzed using logistic regression. In the sample population, 62.5% had taken the fecal occult blood test (FOBT), 72.5% reported receiving the invitation letter to participate in the screening program, and 86.8% had prior knowledge of the FOBT. Noncompliance was mainly due to lack of symptoms (40%), non-receipt of invitation letters (39.7%), and forgetfulness or neglect (28.5%). On the contrary, receipt of the letter of invitation (OR 7.35, p < 0.01) and prior knowledge of FOBT (OR 6.32, p < 0.01) were the main variables that increased the probability of test uptake. Other significant variables included frequency of primary care visits (OR 1.71, p < 0.01) and being older (65-69 years old) (OR 1.52, p < 0.01) There is still a pressing need for greater awareness of both CRC risk factors and the benefits of early detection, as well as for overcoming the common misconception that detection should only be sought when symptoms are present.

[Actitudes e imágenes sociales sobre el cribado de cáncer colorrectal. Una aproximación exploratoria mediante grupos de discusión.]

OBJECTIVE

The screening for colorectal cancer (CRC) through the fecal occult blood test (FOBT) has achieved high implementation in Spain, although participation rates are still not optimal. At the same time, available data show significant differences in participation both among autonomous communities and among different sociodemographic groups, which raises various equity issues. This study aimed to conduct an exploratory analysis from a qualitative perspective on the attitudes, perceptions, and social images that the target population for colorectal cancer screenings holded regarding them, as well as the barriers and areas for improvement identified through these.

METHODS

This study was designed using a qualitative research approach, through the conduct of four focus groups in May 2022, with a total of twenty-six participants (equal number of men and women) aged fifty to sixty-nine years. The participants were residents of the Community of Madrid, Catalonia, Andalusia, and the Basque Country (in both large and small cities), with varying educational levels and different previous experiences of participation in the CRC screening program.

RESULTS

Different conceptualizations of prevention were identified, but none that encompassed cancer (especially colorectal cancer) as an element to be incorporated into daily practices since its occurrence is primarily associated with chance. In addition to the lack of knowledge about CRC compared to other types of cancer (such as breast or prostate cancer), various attitudinal barriers to participation in the CRC screening program were perceived. These included the rejection of being part of the older age group (targeted by the test), fear of waiting for the results, lack of reliability, or the sense of being able to postpone the moment.

CONCLUSIONS

This study highlights the need for interventions aimed at promoting the attitude with which the invitation to participate is received and interpreted. It also emphasizes the importance of incorporating colon cancer into the dominant framework of concerns, raising awareness about the significance of early detection, and addressing potential sources of inequity. These interventions should address the broader conceptualization of the role of prevention observed among individuals with higher cultural capital and the greater normalization of screening programs found among women due to their previous experience with breast cancer screening.

Exploring non-participation in colorectal cancer screening: A systematic review of qualitative studies

INTRODUCTION

Worldwide, colorectal cancer is a major public health issue. Despite the existence of screening programmes in many countries, global uptake remains low. This meta-ethnography aimed to analyse qualitative literature to explore attitudes towards colorectal cancer screening and reasons for non-participation in eligible people that do not participate when invited.

METHODS

Systematic searches were conducted in five databases in May 2021. Critical appraisal of included studies was performed using the CASP checklist for qualitative studies.

FINDINGS

Thirteen studies were included. Three main themes and eight sub-themes were developed across studies: (1) Differences in motivation, with non-participants expressing a lack of knowledge and varying levels of intention to participate but not feeling screening was personally necessary; (2) Active aversion to screening expressed by fear, discomfort, disgust or not wanting to know; and (3) Contextual barriers of the healthcare system such as practical constraints or poor relationships with healthcare professionals.

CONCLUSION

Findings suggest multiple pathways to non-participation including ambivalence, aversion to the process and consequences of screening or lack of support. Persuasive messages and prompts to action to target ambivalence, reassurance regarding the screening procedures to target negative reactions, and increased support from healthcare professionals may be beneficial in increasing screening uptake.

Factors influencing organised faecal occult blood test screening participation in culturally and linguistically diverse populations: a scoping review

OBJECTIVE

This review aims to provide a comprehensive overview of the literature examining factors influencing participation in organised faecal occult blood test (FOBT) screening programmes in culturally and linguistically diverse populations. This article addresses gaps in the literature by providing a mixed methods review of the multilevel influences on FOBT screening in culturally and linguistically diverse (CALD) populations. This review was guided by the question "What are the factors influencing participation in organised FOBT screening programs in CALD populations?"

STUDY DESIGN

Scoping review.

METHODS

A scoping review methodology was used to summarise the available evidence. A thematic analysis of the included studies was undertaken to identify factors influencing organised FOBT screening participation in CALD populations from the literature.

RESULTS

FOBT screening participation was lower by ethnicity, religion, birthplace and language spoken. Barriers to screening included, faecal aversion, fatalism, fear of cancer, language and literacy barriers, difficulty accessing translated materials and low colorectal screening knowledge and awareness. CALD populations also had lower perceived benefits, susceptibility and cues to action, higher perceived barriers and greater perceived external health locus control than non-CALD populations. Facilitators of screening included positive attitudes to screening, general practitioner recommendations and social support. Group education sessions and narrative-based screening information were found to increase screening participation.

CONCLUSION

This review highlights the range of interrelated factors influencing participation in organised FOBT screening programmes in CALD populations and proposes multicomponent interventions to address low screening uptake. Features of successful community-level interventions should be explored further. Narratives show promise for engaging CALD populations. Accessibility of screening information should be addressed at the system level. Leveraging the general practitioner relationship in promoting FOBT screening programmes may also be an effective strategy to target 'hard-to-reach' populations.

The role of disgust as an emotional barrier to colorectal cancer screening participation: a systematic review and meta-analysis

OBJECTIVE

Worldwide colorectal cancer (CRC) screening rates are suboptimal. This systematic review and meta-analysis examine the role of disgust in CRC screening avoidance.

DESIGN

A systematic literature search was conducted. In all, 46 studies were included in the review. Among these, 16 studies were compared with a meta-analytical approach in order to 1) estimate the effect size of state disgust on screening intention and attendance; 2) examine whether methodological characteristics moderate the effect of state disgust on screening behaviour; 3) estimate the effect sizes of trait disgust and type of exam kit on state disgust.

RESULTS

In the reviewed studies, state disgust was often associated with CRC screening and especially with CRC screening avoidance. The meta-analysis confirmed low-to-moderate negative effects of state disgust on screening intention and attendance. Population sampling strategy was the only significant moderator of the effect of state disgust on screening attendance, i.e. studies that used convenience (versus random/representative) samples found a significantly lower effect size. Trait disgust and type of exam kit exerted a large and a moderate-to-large positive effect, respectively, on state disgust.

CONCLUSIONS

Disgust can boost CRC screening avoidance. Further studies and interventions must be designed to help patients in overcoming this emotional barrier.

Urinary volatile organic compounds for colorectal cancer screening, a systematic review and meta-analysis

BACKGROUND

The faecal immunochemical test (FIT) suffers from suboptimal performance and participation in colorectal cancer (CRC) screening. Urinary volatile organic compounds (VOCs) may be a useful alternative. We aimed to determine the diagnostic potential of urinary VOCs for CRC/adenomas. By relating VOCs to known pathways, we aimed to gain insight into the pathophysiology of colorectal neoplasia.

METHODS

A systematic search was performed in PubMed, EMBASE and Web of Science. Original studies on urinary VOCs for CRC/adenoma detection with a control group were included. QUADAS-2 tool was used for quality assessment. Meta-analysis was performed by adopting a bivariate model for sensitivity/specificity. Fagan's nomogram estimated the performance of combined FIT-VOC. Neoplasm-associated VOCs were linked to pathways using the KEGG database.

RESULTS

Sixteen studies-involving 837 CRC patients and 1618 controls-were included; 11 performed chemical identification and 7 chemical fingerprinting. In all studies, urinary VOCs discriminated CRC from controls. Pooled sensitivity and specificity for CRC based on chemical fingerprinting were 84% (95% CI 73-91%) and 70% (95% CI 63-77%), respectively. The most distinctive individual VOC was butanal (AUC 0.98). The estimated probability of having CRC following negative FIT was 0.38%, whereas 0.09% following negative FIT-VOC. Combined FIT-VOC would detect 33% more CRCs. In total 100 CRC-associated urinary VOCs were identified; particularly hydrocarbons, carboxylic acids, aldehydes/ketones and amino acids, and predominantly involved in TCA-cycle or alanine/aspartate/glutamine/glutamate/phenylalanine/tyrosine/tryptophan metabolism, which is supported by previous research on (colorectal)cancer biology. The potential of urinary VOCs to detect precancerous adenomas or gain insight into their pathophysiology appeared understudied.

CONCLUSION

Urinary VOCs hold potential for non-invasive CRC screening. Multicentre validation studies are needed, especially focusing on adenoma detection. Urinary VOCs elucidate underlying pathophysiologic processes.

Patients' Expectations and Preferences for the Organizational Conditions of the Colorectal Cancer Screening Programme in Poland: A Qualitative Analysis

(1) Background: Colorectal cancer (CRC) is a serious health problem in Poland as well as many European Union countries. The study aimed to describe factors that, from the patient's perspective, could increase the attendance rate and regularity of participation in the colorectal cancer screening programme (SP); (2) Methods: The qualitative approach was applied. The study involved six focus interviews conducted with 24 respondents (12 women and 12 men) aged 40-49, who had at least one first-degree family member diagnosed with CRC and persons aged 50-65, living in five selected voivodships (provinces) of Poland. The collected data were thematically coded. Further, a comparative analysis was conducted, and aggregated statements were formulated; (3) Results: The inclusion of primary care clinics within the CRC SP organization was reported as a key factor in improving the attendance rate and regularity of patient participation in the programme. Particularly important factors included an invitation in the form of a personal letter or a phone call made by staff from primary care clinics; (4) Conclusions: Patients were confirmed to have clear expectations and preferences for the organizational conditions of the CRC SP. Preferences nature allows them to be treated as one of the potential criteria for selecting critical parameters of CRC SPs.

Implementation of a home-based colorectal cancer screening intervention in Malaysia (CRC-SIM)

INTRODUCTION

The Colorectal Cancer Screening Intervention for Malaysia (CRC-SIM) was a CRC study of home-based testing designed to improve low screening uptake using the immunochemical fecal occult blood test (iFOBT) in Malaysia.

METHODS

This quasi-experimental study was informed by the Implementation Research Logic Model and evaluated with the RE-AIM framework. Trained data collectors recruited by phone, randomly selected, asymptomatic adults aged 50-75 years from Segamat District, who previously completed a health census form for the South East Asia Community Observatory (SEACO). Participants were posted an iFOBT kit and asked to return a photo of the completed test for screening by health care professionals. A regression analysis of evaluation data was conducted to identify which variables were associated with the outcome indicators of 'study participation' and 'iFOBT completion' and the CRC-SIM was evaluated in terms of its appropriateness, feasibility and acceptability.

RESULTS

Seven hundred forty-seven eligible adults (52%) agreed to participate in this study and received an iFOBT kit. Participation was significantly lower amongst Chinese Malaysians (adjusted OR 0.45, 95% CI 0.35 - 0.59, p<0.001) compared to Malays and amongst participants from the rural sub-district (Gemereh) (adjusted OR 0.71, 95% CI 0.54 - 0.92, p=0.011) compared to the urban sub-district (Sungai Segamat). Less than half of participants (42%, n=311/747) completed the iFOBT. Test-kit completion was significantly higher amongst Chinese Malaysians (adjusted OR 3.15, 95% CI 2.11 - 4.69, p<0.001) and lower amongst participants with a monthly household income ≥RM 4,850 (adjusted OR 0.58, 95% CI 0.39 - 0.87, p=0.009) compared to participants with a lower household income. The main reported reason for non-participation was 'not interested' (58.6%) and main implementation challenges related to invalid photographs from participants and engaging iFOBT positive participants in further clinic consultations and procedures.

CONCLUSION

Home-testing for CRC (test completion) appeared to be acceptable to only around one-fifth of the target population in Malaysia. However, mindful of the challenging circumstances surrounding the pandemic, the CRC-SIM merits consideration by public health planners as a method of increasing screening in Malaysia, and other low- and middle-income countries.

Facilitators and barriers to colorectal cancer screening using the immunochemical faecal occult blood test among an average-risk population in semi-rural Malaysia: A qualitative study

BACKGROUND

Colorectal cancer (CRC) incidence in Malaysia is increasing, and most CRC patients are diagnosed at a late stage. This study investigated participant awareness of CRC and their perceptions and views about CRC screening, barriers, benefits, and facilitators towards CRC screening participation as well as health-seeking behaviour and the use of preventative health services.

METHOD

Eleven focus group discussions (FGDs) were conducted with a purposive sample of 89 participants aged > 50 from the major ethnic groups in the Segamat District, Johor State. FGDs were audiotaped, transcribed verbatim, and translated into English. Data were analysed using thematic analysis.

RESULTS

We identified trust in doctors as a key reason for whether or not to seek health care. Generally, the participants had low awareness of CRC sign/symptoms and screening. Emotional and logistic concerns about sending a stool sample to a clinic emerged as the main barriers to screening. Simplified illustrated instructions about stool collection in Malay, Chinese and Tamil, free screening at health clinics and reminders to complete the iFOBT test were perceived to facilitate engagement in screening, and posited as strategies that were likely to increase iFOBT uptake.

CONCLUSION

Primary care physicians play a crucial role in terms of reducing patient's misperceptions, recommending screening to patients, enhancing attendance, and improving uptake of CRC screening. There is a need for further research to investigate ways in which to reduce identified barriers and implement and test potential facilitative strategies as well as examine adherence by doctors to clinical guidelines about CRC screening.

Self-Reported Reasons for Inconsistent Participation in Colorectal Cancer Screening Using FIT in Flanders, Belgium

Background: In Flanders, the uptake in the population-based colorectal cancer (CRC) screening program (using fecal immunochemical test, FIT) is suboptimal (~50%). This study explored the reasons for inconsistent participation in FIT screening among irregular participants in Flanders. Methods: An online survey with both open questions and fixed statements was sent to irregular participants (2016–2018) in the Flemish CRC screening program. A reminder email followed eight weeks after the first email. Data analysis used both qualitative and quantitative approaches. Post-stratification weights based on gender, age group, and the first two digits of the postcode were employed to reduce non-response bias. Results: In total, 5328 out of 19,592 irregular participants responded to the survey. While the main reasons not to participate were related to ‘postponing participation’ and ‘having other priorities’, the main reasons to participate were related to the importance of (preventive) health checks. The role of general practitioners (GPs) in promoting CRC screening also emerged as an important theme among the respondents’ answers (based on fixed statements). Conclusions: The study reported the main reasons for inconsistent participation in FIT screening for CRC in Flanders. The findings are helpful in guiding tailored interventions to increase FIT screening uptake in the region.

Route to diagnosis of colorectal cancer and association with survival within the context of a bowel screening programme

OBJECTIVES

Bowel cancer screening has been introduced to improve colorectal cancer outcomes; however, a significant proportion of cases continue to present with TNM Stage III-IV disease and/or emergently. This study analyses the prior interaction with screening of patients diagnosed with colorectal cancer and factors associated with non-screening diagnosis.

STUDY DESIGN

This was a retrospective observational study.

METHODS

All patients diagnosed with colorectal cancer in the West of Scotland from 2011 to 2014 were identified. Through data linkage to the Scottish Bowel Cancer Screening Programme, we analysed patient interaction with screening within 2 years before cancer diagnosis.

RESULTS

In total, 6549 patients were diagnosed with colorectal cancer, 1217 (19%) via screening. Screening participation was associated with earlier TNM stage, reduced emergency presentations and improved 3-year survival (all P < 0.001). Failure to diagnose through screening was predominantly due to non-invitation (37%), non-return of screening test (29%) or negative test (13%). Three hundred fifty-one patients were below screening age, 79% of whom were aged 40-49 years and 2035 patients were above screening age. Factors associated with non-return of screening test included age, sex, SIMD (all P < 0.001) and raised Charlson score (P = 0.030). Factors associated with negative screening result included sex, anaemia, differentiation, right-sided tumours and venous invasion (P < 0.001).

CONCLUSION

Within Scotland, <20% of colorectal cancer is diagnosed through screening despite the existence of a population screening programme. Measures must be taken to improve screening participation including encouragement of those of routine screening age and those age ≥75 years in good health to participate in screening with consideration given to extending screening to under 50s. A significant false-negative rate of testing was observed in the present study and this requires further investigation within a population undergoing screening through faecal immunochemical testing.

Capsule endoscopy - a non-invasive modality to investigate the GI tract: out with the old and in with the new?

INTRODUCTION

Capsule endoscopy has had significant development since it was introduced into the field of medicine in 2000. It is non-invasive, well tolerated, does not require sedation and is a first-line small bowel investigative modality. As it transits through the entire gastrointestinal (GI) tract, it has the potential to provide a pan-enteric examination.

AREAS COVERED

In this review we will discuss the new diagnostic modalities along with traditional methods which have been used for examination of the gastro intestinal (GI) tract. The main focus of this review will be on the use of capsule endoscopy for pan-enteric examination.

EXPERT OPINION

Capsule endoscopy is an accepted first-line investigation for the small bowel. Diagnostic sensitivity of the colon capsule is comparable to colonoscopy in controlled trials and is being evaluated in high-risk patients in routine clinical practice in national programs. Preliminary data suggest that a magnetic-controlled examination of the upper GI tract could be developed to enable a complete upper GI examination.

Breast cancer in India: Present scenario and the challenges ahead

Breast cancer is the commonest malignancy among women globally. From being fourth in the list of most common cancers in India during the 1990s, it has now become the first. In this review, we examine the available literature to understand the factors that contributed to the high burden of breast cancer in the country. We also provide the landscape of changes in the field of early diagnosis and the treatment modalities as well as the limitations of the Indian healthcare delivery systems (e.g., delayed diagnosis, human resources and funding for treatment). This review also sheds light on the newer interventions and the future of breast cancer management keeping in mind the coronavirus disease 2019 imposed limitations.

Barriers and facilitators to participate in the colorectal cancer screening programme in Flanders (Belgium): a focus group study

OBJECTIVE

In Flanders (Belgium), a population-based colorectal cancer (CRC) screening programme offers a faecal immunochemical test (FIT) biennially to Flemish citizens aged 50-74 years. A FIT uptake of only 51,5% in 2018 is significantly lower among men, lower income groups and among people with other than the Belgian nationality.The objective of this study was to identify attitudes, barriers and facilitators to participate in the Flemish CRC screening programme.

METHODS

Qualitative study using focus group discussions (FGDs) with non-participants in the Flemish CRC screening programme. Four FGDs were held with non-migrant Flemish population groups, and four were held with Turkish migrants (41 participants).

RESULTS

Feeling healthy, fear of cancer and embarrassment to talk about CRC screening emerged as common barriers in all FGDs. Having other priorities (non-migrant group) and a lack of understanding mainly due to a language barrier (Turkish migrants) differed between the two groups. Providing face-to-face information, information in group and GP recommendation were perceived as important facilitators to CRC screening in both groups. More publicity and making CRC screening more of a routine (non-migrant group) and offering translated information (Turkish migrants) were the suggested facilitators that differed between the groups.

CONCLUSIONS

Several common and some group-specific barriers and facilitators appeared to play a role in the decision to participate in the CRC screening programme. In order to improve informed decision making and participation in the CRC screening programme in Flanders, the options of more GP involvement, targeted information events, and adapted reminder letters are currently being explored.

Intentions to participate in cervical and colorectal cancer screening during the COVID-19 pandemic: A mixed-methods study

Worldwide, cancer screening faced significant disruption in 2020 due to the COVID-19 pandemic. If this has led to changes in public attitudes towards screening and reduced intention to participate, there is a risk of long-term adverse impact on cancer outcomes. In this study, we examined previous participation and future intentions to take part in cervical and colorectal cancer (CRC) screening following the first national lockdown in the UK. Overall, 7543 adults were recruited to a cross-sectional online survey in August-September 2020. Logistic regression analyses were used to identify correlates of strong screening intentions among 2319 participants eligible for cervical screening and 2502 eligible for home-based CRC screening. Qualitative interviews were conducted with a sub-sample of 30 participants. Verbatim transcripts were analysed thematically. Of those eligible, 74% of survey participants intended to attend cervical screening and 84% intended to complete home-based CRC screening when next invited. Thirty percent and 19% of the cervical and CRC samples respectively said they were less likely to attend a cancer screening appointment now than before the pandemic. Previous non-participation was the strongest predictor of low intentions for cervical (aOR 26.31, 95% CI: 17.61-39.30) and CRC (aOR 67.68, 95% CI: 33.91-135.06) screening. Interview participants expressed concerns about visiting healthcare settings but were keen to participate when screening programmes resumed. Intentions to participate in future screening were high and strongly associated with previous engagement in both programmes. As screening services recover, it will be important to monitor participation and to ensure people feel safe to attend.

Education provision in community setting increases engagement with bowel cancer screening

In the United Kingdom, colorectal carcinoma (CRC) is the third most prevalent and second most lethal cancer, accounting for 1 in 10 cancer deaths. To address this health burden, the NHS implemented a national screening programme to detect traces of blood in the stool of those at highest risk of CRC - men and women aged over 60. Preliminary data showed that the screening programme reduced CRC death by 16% overall and 23% in those who had returned their kit, highlighting the importance of patient engagement. Worryingly, recent data has indicated that engagement with the screening programme has begun to decline. Many GP surgeries are failing to achieve the 75% quota set by the Quality and Outcomes Framework, with London performing least favourably within the UK. To address this, we set up an educational intervention at a London GP practice, targeting misconceptions and anxieties associated with bowel screening and CRC in general, to assess whether this would improve patients' confidence in returning a stool sample as suggested by previous studies. Our results came to promising conclusions, but we remain cautious that our preliminary findings are subject to confounding influences which prevent conclusion of a causal relationship.

Emotional Barriers to Bowel Screening in Italy: Scale psychometric properties and effects on screening attendance

OBJECTIVE

To assess a three-factor version of the Emotional Barriers to Bowel Screening (EBBS) scale; analyze the scale's psychometric properties; and investigate the associations of fecal disgust, embarrassment, and fear with colorectal cancer (CRC) screening avoidance.

METHODS

Retrospective design: We asked participants to rate negative emotions associated with CRC screenings as well as whether they had ever attended a fecal occult blood test.

SAMPLE

268 Italian adults aged 45-74 years.

MEASURES

negative emotions, screening knowledge, CRC risk perception, demographic and background data, and hypothetical medical help-seeking.

ANALYSES

Confirmatory factor analyses, correlations, logistic regressions.

RESULTS

The EBBS scale is a multidimensional instrument and, at least where fecal tests are of interest, can be used without the insertion disgust subscale. The analyzed negative emotions were negatively correlated with screening attendance and positively correlated with intention to delay seeking medical help. However, logistic regression models showed that, of the three analyzed emotions, fear about outcome was the only significant predictor of screening behavior and delaying medical care.

CONCLUSIONS

Further studies can adopt the version of the EBBS scale that is most suitable for their research contexts. Interventions must be designed to reassure patients.

Reasons for intending to accept or decline kidney cancer screening: thematic analysis of free text from an online survey

OBJECTIVES

Kidney cancer has been identified as a disease for which screening might provide significant benefit for patients. The aim of this study was to understand in detail the facilitators and barriers towards uptake of a future kidney cancer screening programme, and to compare these across four proposed screening modalities.

DESIGN

An online survey including free-text responses.

SETTING

UK PARTICIPANTS: 668 adults PRIMARY AND SECONDARY OUTCOME MEASURES: The survey assessed participants' self-reported intention to take-up kidney cancer screening with four different test methods (urine test, blood test, ultrasound scan and low-dose CT). We conducted thematic analysis of 2559 free-text comments made within the survey using an inductive approach.

RESULTS

We identified five overarching themes that influenced screening intention: 'personal health beliefs', 'practicalities', 'opinions of the test', 'attitudes towards screening' and 'cancer apprehension'. Overall, participants considered the tests presented as simple to complete and the benefits of early detection to outweigh any drawbacks to screening. Dominant facilitators and barriers varied with patterns of intention to take up screening across the four tests. Most intended to take up screening by all four tests, and for these participants, screening was seen as a positive health behaviour. A significant minority were driven by practicalities and the risks of the tests offered. A smaller proportion intended to reject all forms of screening offered, often due to fear or worry about results and unnecessary medical intervention or a general negative view of screening.

CONCLUSIONS

Most individuals would accept kidney cancer screening by any of the four test options presented because of strong positive attitudes towards screening in general and the perceived simplicity of the tests. Providing information about the rationale for screening in general and the potential benefits of early detection will be important to optimise uptake among uncertain individuals.

Improving Adenoma Detection Rates: The Role of the Fecal Immunochemical Test

Background

There is limited knowledge about adenoma detection rates (ADRs) in patients with a positive fecal immunochemical test (FIT). We hypothesized that colonoscopy performed after FIT would result in higher ADRs.

Methods

We reviewed ADRs for colonoscopies performed after a positive FIT test and compared them to ADR rates for routine colonoscopy performed without an initial FIT test between November 2014 and March 2017 at multiple endoscopy sites.

Results

A total of 979 patients underwent a FIT testing in the Texas panhandle, of whom 12.1% (n=119) tested positive. Also, 32.8% (n=39) were found to have one or more tubular adenomatous polyps on final pathological examination. Among these patients, the majority were female (64.1%; n=25). Of the patients, 15.9% (n=19) had a hyperplastic polyp, 1.7% (n=2) had findings consistent with ulcerative colitis, and 0.8% (n=1) were positive for an adenocarcinoma. In the control group of 2,603 patients in whom routine colonoscopy was performed as the initial tool for screening, 719 were found to have one or more tubular adenomas, with an ADR rate of 27.5%. In this group, the cancer rate was found to be 1%.

Conclusions

There was a significant increase in the ADR when colonoscopy is conducted after a positive FIT test. Recommending colonoscopies after a positive FIT test will not only improve ADRs significantly but also lower the overall healthcare cost for screening colon cancer in this era of escalating healthcare costs.

Detection of colorectal cancer in urine using DNA methylation analysis

Colorectal cancer (CRC) is the second leading cause for cancer-related death globally. Clinically, there is an urgent need for non-invasive CRC detection. This study assessed the feasibility of CRC detection by analysis of tumor-derived methylated DNA fragments in urine. Urine samples, including both unfractioned and supernatant urine fractions, of 92 CRC patients and 63 healthy volunteers were analyzed for DNA methylation levels of 6 CRC-associated markers (SEPT9, TMEFF2, SDC2, NDRG4, VIM and ALX4). Optimal marker panels were determined by two statistical approaches. Methylation levels of SEPT9 were significantly increased in urine supernatant of CRC patients compared to controls (p < 0.0001). Methylation analysis in unfractioned urine appeared inaccurate. Following multivariate logistic regression and classification and regression tree analysis, a marker panel consisting of SEPT9 and SDC2 was able to detect up to 70% of CRC cases in urine supernatant at 86% specificity. First evidence is provided for CRC detection in urine by SEPT9 methylation analysis, which combined with SDC2 allows for an optimal differentiation between CRC patients and controls. Urine therefore provides a promising liquid biopsy for non-invasive CRC detection.

Factors affecting patient adherence to publicly funded colorectal cancer screening programmes: a systematic review

OBJECTIVES

Colorectal cancer (CRC) is the third most common cancer. Many countries in Europe have already implemented systematic screening programmes as per the recommendations by the European Union. The impact of screening is highly dependent on participation rates. The aim of the study was to identify barriers, facilitators and modifiers to participation in systematised, stool sample-based, publicly financed CRC screening programmes.

STUDY DESIGN

Systematic review.

METHODS

A systematic search in PubMed, Embase, MEDLINE, CINAHL, Cochrane CENTRAL, Google Scholar and PsycINFO was undertaken. We included both qualitative and quantitative studies reporting on barriers and facilitators (excluding sociodemographic variables) to participation in stool sample-based CRC screening. Barriers and facilitators to participation were summarised and analysed.

RESULTS

The inclusion criteria were met in 21 studies. Reported barriers and facilitators were categorised into the following seven themes (examples): psychology (fear of cancer), religion (believing cancer is the will of God), logistics (not knowing how to conduct the test), health-related factors (mental health), knowledge and awareness (lack of knowledge about the test), role of the general practitioner (being supported in taking the test by the general practitioner), and environmental factors (knowing someone who has participated in a screening programme). Six studies reported that non-participation was not due to a negative attitude towards screening for CRC.

CONCLUSION

Many barriers to screening were found. It is important to work with peoples' fear of screening. Moreover, this review suggests that it might be possible to increase participation rates, if the population-wide awareness and knowledge of potential health benefits of CRC screening are increased and proper logistical support is provided.

AGA White Paper: Roadmap for the Future of Colorectal Cancer Screening in the United States

The American Gastroenterological Association's Center for Gastrointestinal Innovation and Technology convened a consensus conference in December 2018, entitled, "Colorectal Cancer Screening and Surveillance: Role of Emerging Technology and Innovation to Improve Outcomes." The goal of the conference, which attracted more than 60 experts in screening and related disciplines, including the authors, was to envision a future in which colorectal cancer (CRC) screening and surveillance are optimized, and to identify barriers to achieving that future. This White Paper originates from that meeting and delineates the priorities and steps needed to improve CRC outcomes, with the goal of minimizing CRC morbidity and mortality. A one-size-fits-all approach to CRC screening has not and is unlikely to result in increased screening uptake or desired outcomes owing to barriers stemming from behavioral, cultural, and socioeconomic causes, especially when combined with inefficiencies in deployment of screening technologies. Overcoming these barriers will require the following: efficient utilization of multiple screening modalities to achieve increased uptake; continued development of noninvasive screening tests, with iterative reassessments of how best to integrate new technologies; and improved personal risk assessment to better risk-stratify patients for appropriate screening testing paradigms.

Implementation Strategies for Interventions Aiming to Increase Participation in Mail-Out Bowel Cancer Screening Programs: A Realist Review

Background: Bowel cancer is the third most commonly diagnosed cancer and the third most common cause of cancer-related death, with 1,849,518 new cases of bowel diagnosed and 880,792 deaths reported globally in 2018 alone. Survival can be improved through early detection via national mail-out bowel cancer screening programs; however, participation remains low in many countries. Behavior change is therefore required to increase participation. This realist review aims to (a) identify the behavior change techniques (BCTs) used in each intervention, (b) understand the mechanisms of action (MoAs) responsible for the BCT effectiveness, and (c) apply a behavior change model to inform how MoAs can be combined to increase screening participation.

Methods: We systematically reviewed the literature for interventions aiming to increase participation in mail-out bowel cancer screening. We used a four-stage realist synthesis approach whereby (1) interventions were extracted from each study; (2) BCTs applied in each intervention were identified and coded using the BCT Taxonomy-v1; (3) the Theory and Techniques Tool was used to link BCTs to their MoA; and (4) BCTs and MoAs were categorized according to their effectiveness and what Health Action Process Approach (HAPA) stage of change they would affect.

Results: We identified 68 intervention trials using 26 unique BCTs and 13 MoAs to increase participation. Sixteen BCTs and 10 MoAs were identified within the interventions that successfully increased participation rates. Interventions targeting both stages of the HAPA model had a higher success rate (80%) than those targeting one stage of change (51%). When targeting only one stage, interventions targeting the volitional stage had a higher success rate (71%) than interventions targeting only the motivational stage of change (26%).

Conclusion: Importantly, this review identified a suite of BCTs and MoAs effective for increasing participation in mail-out bowel cancer screening programs. With increased participation in bowel cancer screening leading to improved survival, our findings are key to informing the improvement of policy and interventions that aim to increase screening using specific strategies at key stages of health decision-making.

Barriers and facilitators for colorectal cancer screening in a low-income urban community in Mexico City

Background

Colorectal cancer (CRC) incidence and mortality are increasing in many low- and middle-income countries (LMICs), possibly due to a combination of changing lifestyles and improved healthcare infrastructure to facilitate diagnosis. Unfortunately, a large proportion of CRC cases in these countries remain undiagnosed or are diagnosed at advanced stages, resulting in poor outcomes. Decreasing mortality trends in HICs are likely due to evidence-based screening and treatment approaches that are not widely available in LMICs. Formative research to identify emerging opportunities to implement appropriate screening and treatment programs in LMICs is, therefore, of growing importance. We sought to identify potential barriers and facilitators for future implementation of fecal immunochemical test (FIT)-based CRC screening in a public healthcare system in a middle-income country with increasing CRC incidence and mortality.

Methods

We performed a qualitative study with semi-structured individual and focus group interviews with different CRC screening stakeholders, including 30 lay people at average risk for CRC, 13 health care personnel from a local public clinic, and 7 endoscopy personnel from a cancer referral hospital. All interviews were transcribed verbatim for analysis. Data were analyzed using the constant comparison method, under the theoretical perspectives of the social ecological model (SEM), the PRECEDE-PROCEED model, and the health belief model.

Results

We identified barriers and facilitators for implementation of a FIT-based CRC screening program at several levels of the SEM. The main barriers in each of the SEM levels were as follows: (1) at the social context level: poverty, health literacy and lay beliefs related to gender, cancer, allopathic medicine, and religion; (2) at the health services organization level: a lack of CRC knowledge among health care personnel and the community perception of poor quality of health care; and (3) at the individual level: a lack of CRC awareness and therefore lack of risk perception, together with fear of participating in screening activities and finding out about a serious disease. The main facilitators perceived by the participants were CRC screening information and the free provision of screening tests.

Conclusions

This study's findings suggest that multi-level CRC screening programs in middle-income countries such as Mexico should incorporate complementary strategies to address barriers and facilitators, such as (1) provision of free screening tests, (2) education of primary healthcare personnel, and (3) promotion of non-fear-based CRC screening messages to the target population, tailored to address common lay beliefs.

Characteristics and attitudes of first round invitees in the Irish National Colorectal Cancer Screening Programme

BACKGROUND/OBJECTIVE

Colorectal cancer (CRC) screening is proven to reduce CRC-related mortality. Faecal immunochemical testing (FIT)-positive clients in the Irish National CRC Screening Programme underwent colonoscopy. Round 1 uptake was 40.2%. We sought to identify barriers to participation by assessing knowledge of CRC screening and examining attitudes towards FIT test and colonoscopy.

METHODS

Questionnaires based on a modified Champion's Health Belief Model were mailed to 3500 invitees: 1000 FIT-positive, 1000 FIT-negative and 1500 non-participants. 44% responded: 550 (46%) FIT-positive, 577 (48%) FIT-negative and 69 (6%) non-responders (NR).

RESULTS

25% of respondents (n=286) did not perceive a personal risk of cancer, did not perceive CRC to be a serious disease and did not perceive benefits to screening. These opinions were more likely to be expressed by men (p=0.035). One-fifth (n=251) found screening stressful. Fear of cancer diagnosis and test results were associated with stress. FIT-positive clients, women and those with social medical insurance were more likely to experience stress.

CONCLUSIONS

The CRC screening process causes stress to one-fifth of participants. Greater use of media and involvement of healthcare professionals in disseminating information on the benefits of screening may lead to higher uptake in round 2.

Patients' views on involving general practice in bowel cancer screening: a South Australian focus group study

OBJECTIVES

To explore patients' experiences of bowel cancer screening and its promotion, and perspectives on possible input from general practice for improving screening rates.

DESIGN

Qualitative focus group study underpinned by a phenomenological approach.

SETTING

Three general practice clinics in metropolitan South Australia.

PARTICIPANTS

Thirty active general practice patients, aged 50-74 years (60% female) who were eligible for the National Bowel Cancer Screening Program.

FINDINGS

Factors affecting screening were described, with particular concerns regarding the nature of the test, screening process and culture. There were mixed views on the role for general practice in bowel cancer screening; some participants appreciated the current process and viewed screening as out of scope of primary care services, while others were in support of general practice involvement. Roles for general practice were proposed that comprised actions across the continuum from providing information through to reminders and the provision and collection of screening kits. With a view that multifaceted strategies are required to encourage participation, community-based solutions were suggested that centred on improving screening culture and education.

CONCLUSIONS

There was a view among participants that general practice could play a useful role in supporting the uptake of the National Bowel Cancer Screening Program, however participants saw a need for multiple strategies at different levels and under different jurisdictions.

Biomarker measurement in non-invasively sampled colorectal mucus as a novel approach to colorectal cancer detection: screening and triage implications

Background

Faecal tests are widely applied for colorectal cancer (CRC) screening and considered for triaging symptomatic patients with suspected CRC. However, faecal tests can be inconvenient, complex and expensive. Colorectal mucus (CM) sampled using our new patient-friendly non-invasive technique is rich in CRC biomarkers. This study aimed to evaluate diagnostic accuracy of CRC detection by measuring protein biomarkers in CM.

Methods

Colorectal mucus samples were provided by 35 healthy controls, 62 CRC-free symptomatic patients and 40 CRC patients. Biomarkers were quantified by ELISA. Diagnostic performances of haemoglobin, C-reactive protein, tissue inhibitor of metalloproteinases-1, M2-pyruvate kinase, matrix metalloproteinase-9, peptidyl arginine deiminase-4, epidermal growth factor receptor, calprotectin and eosinophil-derived neurotoxin were assessed using receiver operating characteristic (ROC) curve analysis.

Results

Colorectal mucus haemoglobin was superior compared to other biomarkers. For haemoglobin, the areas under the curve for discriminating between CRC and healthy groups (‘screening’) and between CRC and symptomatic patients (‘triage’) were 0.921 and 0.854 respectively. The sensitivity of 80.0% and specificities of 94.3% and 85.5% for the two settings respectively were obtained.

Conclusions

Haemoglobin quantification in CM reliably detects CRC. This patient-friendly approach presents an attractive alternative to faecal immunochemical test; however, the two methods need to be directly compared in larger studies.

Knowledge, Attitudes, and Behaviors of Viral Hepatitis Among Recent African Immigrants in the United States: A Community Based Participatory Research Qualitative Study

Background: In the United States, hepatocellular carcinoma is the ninth leading cause of cancer mortality. Hepatocellular carcinoma disproportionately affects individuals of African ancestry with the rates being higher amongst individuals of foreign-born African ancestry. This study explored knowledge, attitudes, and behaviors toward viral hepatitis transmission, screening, and vaccination among recent African immigrants in Minnesota and identify ways to improve early detection and screening methods. Methods: A community based participatory research (CBPR) team with minority researchers and community members sought to gain insight on persons of African Ancestry knowledge, attitudes, and behaviors related to viral hepatitis by conducting a qualitative research study. The CBPR team developed a focus group moderator's guide with semi-structured questions related to transmission, screening, and vaccination of viral hepatitis. We conducted seven focus groups using bilingual, bicultural moderators with participants from local Ethiopian, Liberian and Kenyan communities from August 10th, 2014 to October 11th, 2014. Focus groups were audio recorded and transcribed. The CBPR team categorized the data into themes and subthemes with consensus using traditional content analysis. Results: Community partners recruited 63 participants with a majority identifying as male (51%). Participants lacked knowledge of viral hepatitis screening, vaccination, and treatment. Participants were aware of some behaviors that increased risk of acquisition of hepatitis. Participants endorsed a strategy of developing and delivering educational materials for African immigrants. Moreover, access to care and cultural awareness were mentioned as pivotal for prevention and treatment of viral hepatitis. Conclusions: Findings from this pilot study provide insight on areas of research focus. Having a research team consisting of members from the community helped to increase trust and foster an understanding of shared community values. Information from this study provides evidence to support the development culturally appropriate strategies to address disparities in viral hepatitis in these communities.

Biomarkers for detecting colorectal cancer non-invasively: DNA, RNA or proteins?

Colorectal cancer (CRC) is a global problem affecting millions of people worldwide. This disease is unique because of its slow progress that makes it preventable and often curable. CRC symptoms usually emerge only at advanced stages of the disease, consequently its early detection can be achieved only through active population screening, which markedly reduces mortality due to this cancer. CRC screening tests that employ non-invasively detectable biomarkers are currently being actively developed and, in most cases, samples of either stool or blood are used. However, alternative biological substances that can be collected non-invasively (colorectal mucus, urine, saliva, exhaled air) have now emerged as new sources of diagnostic biomarkers. The main categories of currently explored CRC biomarkers are: (1) Proteins (comprising widely used haemoglobin); (2) DNA (including mutations and methylation markers); (3) RNA (in particular microRNAs); (4) Low molecular weight metabolites (comprising volatile organic compounds) detectable by metabolomic techniques; and (5) Shifts in gut microbiome composition. Numerous tests for early CRC detection employing such non-invasive biomarkers have been proposed and clinically studied. While some of these studies generated promising early results, very few of the proposed tests have been transformed into clinically validated diagnostic/screening techniques. Such DNA-based tests as Food and Drug Administration-approved multitarget stool test (marketed as Cologuard®) or blood test for methylated septin 9 (marketed as Epi proColon® 2.0 CE) show good diagnostic performance but remain too expensive and technically complex to become effective CRC screening tools. It can be concluded that, despite its deficiencies, the protein (haemoglobin) detection-based faecal immunochemical test (FIT) today presents the most cost-effective option for non-invasive CRC screening. The combination of non-invasive FIT and confirmatory invasive colonoscopy is the current strategy of choice for CRC screening. However, continuing intense research in the area promises the emergence of new superior non-invasive CRC screening tests that will allow the development of improved disease prevention strategies.

Reasons for non-participation in public oncological screening programs in the Italian region Friuli Venezia Giulia

OBJECTIVES

In the Italian region Friuli Venezia Giulia, public screening is offered for cervical cancer, breast cancer, and colorectal cancer. Participation of the target population is lower than 70%. Our aim was to investigate reasons for non-participation.

STUDY DESIGN

This is a qualitative survey.

METHODS

A telephone survey was conducted in 2018 on a random sample of persons not adhering in 2017. Only one question about the reason for non-participation was asked. The answers were transcribed verbatim with no personal identifiers and no additional information. The transcribed anonymous answers were then read and classified into mutually exclusive macrocategories and subcategories.

RESULTS

A total of 4456 non-adhering persons were surveyed. Personal practical issues were the most common type of barrier reported in all three screening programs, followed by personal beliefs. Program-related issues were more common in cervical cancer screening than in the others. Almost half of the women not participating in the public breast cancer screening and 40% of those not adhering to the public cervical cancer screening had mammography or Pap test out of the public program.

CONCLUSIONS

In this region, practitioners should work to overcome practical barriers and discuss personal beliefs. Surveys of non-participants in other geographic areas would be important to adequately inform local policymaking.

Bowel cancer screening in an English prison: a qualitative service evaluation

OBJECTIVES

Bowel cancer screening home-testing kits are offered every two years to individuals aged 60-74 years in the United Kingdom (UK), with prisoners eligible for screening in the same way as the general population. There are currently major changes planned to the bowel cancer screening programme in England, with the transition to the single-sample faecal immunochemical test (FIT) and the planned lowering of the age limit from 60 to 50 years. In this project, we aimed to explore processes and beliefs around bowel cancer screening in an English prison.

STUDY DESIGN

This is a qualitative study.

METHODS

Semistructured qualitative interviews were conducted with eight prisoners and four staff members in a male prison in North West England. Data were analysed via thematic analysis.

RESULTS

Promoting and impeding factors to screening were identified. There was high willingness amongst prisoners to be screened for bowel cancer, with screening seen as important and having benefits for the individual and healthcare system. However, there was often low awareness of screening and there were psychological challenges associated with screening. Prison healthcare staff were widely respected and were a motivator to accept screening, with prisoners viewing prison as a good opportunity to access health care. Despite this, prison life was characterised by competing priorities, with security taking precedence, and screening sometimes a low priority for staff and prisoners. There were also considerable logistical challenges to delivering bowel cancer screening in a prison, and the system was not comparable with that in the community. Providing good-quality understandable information, though challenging, was key.

CONCLUSIONS

This is the first project to explore entering the bowel cancer screening programme in UK prisons, and promoting and impeding factors to the take-up of screening have been identified. This information could be practically used by local commissioners and policymakers to aid the design of staff and prisoner interventions to maximise uptake of bowel cancer screening in prisons. As the planned changes to bowel cancer screening in England are likely to increase the number of eligible prisoners, this work could also be used to inform any service reconfiguration required to accommodate these changes.

Perceptions of IBD within patient and community samples: a systematic review

Objective: Inflammatory bowel disease (IBD) is a chronic, gastrointestinal condition that involves a range of debilitating bowel symptoms. Adjustment to living with IBD can be negatively impacted by maladaptive cognitive and behavioural factors (e.g. negative illness representations and repressing emotions). Patient samples also report negative reactions from the general public and such perceptions can further negatively impact people living with IBD. Therefore, we aimed to systematically review literature investigating the illness perceptions, perceived stigmatisation, and negative emotional reactions toward IBD within patient and community samples. We also aimed to review how these factors impact those living with IBD (i.e. adjustment, psychological health). Design: A range of databases (e.g. Psych INFO, PubMed) were searched over two years. One reviewer individually screened titles and abstracts using the specified inclusion criteria, and this process was repeated by a second reviewer. Subsequently, the full text articles were screened and data were extracted for the 82 articles that satisfied the inclusion criteria. Following data extraction, a narrative synthesis was conducted.Results: The review of 82 studies suggested that negative illness perceptions are linked to poorer psychosocial outcomes, that patient samples frequently anticipate stigmatisation, fear relating to bowel accidents was the most common emotion reported, and that the general public direct little enacted stigma towards IBD.Conclusion: For people living with IBD: (i) poorer psychological adjustment was reported by those who held more negative perceptions and reactions toward their illness; and (ii) their concerns regarding public perceptions of IBD warrants further empirical attention. Results emphasise the importance of targeting perceptions, and facilitating education and adaptive responding during treatment.

Impact of a mass media campaign on participation in the Australian bowel cancer screening program

Objective

To examine the effect of a mass media campaign designed to increase bowel cancer screening participation.

Methods

We assessed weekly participation, from January 2015 to December 2017, in the Australian National Bowel Cancer Screening Program in Victoria, where a seven-week campaign aired in mid-2017, and in the adjacent comparison state of South Australia. Participation, defined as the number of immunochemical faecal occult blood tests returned out of those invited by the Screening Program in the past 16 weeks, was analysed using negative binomial regression.

Results

Compared with non-campaign weeks, there was an increase in the return rate in the campaign state during campaign weeks (adjusted return rates non-campaign weeks = 34.4% vs. campaign weeks = 45.3%, p < 0.01), not observed in the comparison state (38.3% vs. 40.3%, p > 0.05). The increase in the return rate was significantly greater in the campaign state (Rate Ratio of Campaign/Non-Campaign weeks = 1.31, p < 0.01) than the comparison state (1.05, p > 0.05, interaction p < 0.001), and did not differ significantly by age, sex or socio-economic area. The relative increase was greater among never-participants (Rate Ratio of Campaign/Non-Campaign weeks = 1.24) than previous-participants (1.16), interaction p < 0.001).

Conclusions

This mass media campaign increased bowel cancer screening participation, including from never and low participation subgroups. To maximize participation and ensure equitable population benefit, repeated campaigns that reach eligible people about bowel cancer risks and potential life-saving benefits of screening should be standard.