Socioeconomic determinants of cancer screening utilisation in Latin America: A systematic review

Assessment of barriers to cancer screening and interventions implemented to overcome these barriers in 27 Latin American and Caribbean countries

There is a gap in the understanding of the barriers to cancer screening participation and complying with downstream management in the Community of Latin American and Caribbean states (CELAC). Our study aimed to assess barriers across the cancer screening pathway from the health system perspective, and interventions in place to improve screening in CELAC. A standardized tool was used to collect information on the barriers across the screening pathway through engagement with the health authorities of 27 member states of CELAC. Barriers were organized in a framework adapted from the Tanahashi conceptual model and consisted of the following dimensions: availability of services, access (covering accessibility and affordability), acceptability, user-provider interaction, and effectiveness of services (which includes governance, protocols and guidelines, information system, and quality assurance). The tool also collected information of interventions in place, categorized in user-directed interventions to increase demand, user-directed interventions to increase access, provider-directed interventions, and policy and system-level interventions. All countries prioritized barriers related to the information systems, such as the population register not being accurate or complete (N = 19; 70.4%). All countries implemented some kind of intervention to improve cancer screening, group education being the most reported (N = 23; 85.2%). Training on screening delivery was the most referred provider-directed intervention (N = 19; 70.4%). The study has identified several barriers to the implementation of cancer screening in the region and interventions in place to overcome some of the barriers. Further analysis is required to evaluate the effectiveness of these interventions in achieving their objectives.

Epidemiology of HPV-associated cancers past, present and future: towards prevention and elimination

Cervical cancer is the first cancer deemed amenable to elimination through prevention, and thus lessons from the epidemiology and prevention of this cancer type can provide information on strategies to manage other cancers. Infection with the human papillomavirus (HPV) causes virtually all cervical cancers, and an important proportion of oropharyngeal, anal and genital cancers. Whereas 20th century prevention efforts were dominated by cytology-based screening, the present and future of HPV-associated cancer prevention relies mostly on HPV vaccination and molecular screening tests. In this Review, we provide an overview of the epidemiology of HPV-associated cancers, their disease burden, how past and contemporary preventive interventions have shaped their incidence and mortality, and the potential for elimination. We particularly focus on the cofactors that could have the greatest effect on prevention efforts, such as parity and human immunodeficiency virus infection, as well as on social determinants of health. Given that the incidence of and mortality from HPV-associated cancers remain strongly associated with the socioeconomic status of individuals and the human development index of countries, elimination efforts are unlikely to succeed unless prevention efforts focus on health equity, with a commitment to both primary and secondary prevention.

Factors influencing breast cancer screening practices among women worldwide: a systematic review of observational and qualitative studies

BACKGROUND

The variation in breast cancer incidence rates across different regions may reflect disparities in breast cancer screening (BCS) practices. Understanding the factors associated with these screening behaviors is crucial for identifying modifiable elements amenable to intervention. This systematic review aims to identify common factors influencing BCS behaviors among women globally.

METHODS

Relevant papers were sourced from PubMed, Scopus, Embase, and Google Scholar. The included studies were published in English in peer-reviewed journals from January 2000 to March 2023 and investigated factors associated with BCS behaviors.

RESULTS

From an initial pool of 625 articles, 34 studies (comprising 29 observational and 5 qualitative studies) with 36,043 participants were included. Factors influencing BCS behaviors were categorized into nine groups: socio-demographic factors, health status history, knowledge, perceptions, cultural factors, cues to action, motivation, self-efficacy, and social support. The quality appraisal scores of the studies ranged from average to high.

CONCLUSIONS

This systematic review highlights factors pivotal for policy-making at various levels of breast cancer prevention and assists health promotion professionals in designing more effective interventions to enhance BCS practices among women.

An Overview of Cervical Cancer Prevention and Control in Latin America and the Caribbean Countries

Cervical cancer is a health crisis affecting women and their families across the world. It is known that developed countries have comprehensive protocols with recommendations regarding workforce, expertise, and medical resources to address this common cancer among women. In contrast, disparities in addressing cervical cancer remain present in Latin America and Caribbean countries. Here, we reviewed the current strategies of cervical cancer prevention and control in the region.

Health literacy and breast cancer screening adherence: results from the population of Tuscany, Italy

Mammographic screening can reduce breast cancer (BC) mortality in women. In Italy, although attendance rates increased recently, they are still far from the recommended levels internationally. Inadequate health literacy (HL) may be a reason for poor awareness and/or knowledge about the importance of completing cancer screening. This study examined the relationship between HL, other sociodemographic determinants, and their influence on participation in both opportunistic and organized BC screenings among women aged 50-69 in Tuscany. The study analyzed 2017-2019 data from the Tuscan population subsample in the Italian Behavioral Risk Factor Surveillance System PASSI (Progressi delle Aziende Sanitarie per la Salute in Italia). HL was assessed using the Italian version of the six-item European Health Literacy Survey Questionnaire (HLS-EU-Q6). Among the 2250 interviewees, 75.3% underwent the organized BC screening and 9.4% on voluntary basis. Although to a different extent, HL was significantly associated to compliance rates with both opportunistic and organized screenings. Among sociodemographic factors, only occupational status was associated with opportunistic screening attendance rates. As expected, being invited by letter resulted to be strongly associated with participation to organized screening programs and the medical advice predicts for participating to both opportunistic and organized screening. This study highlights the relevant role that HL plays in BC, opportunistic and organized, screening adherence in a universal healthcare system. To increase BC screening participation rates, healthcare systems would benefit by implementing interventions for improved HL at population level or within healthcare organizations.

Colorectal cancer disparities in Latin America: Mortality trends 1990-2019 and a paradox association with human development

BACKGROUND

Colorectal cancer mortality is growing in Latin America. It is known for a marked income disparity between its countries, and there is a consistent association with development. Our purpose was to describe trends in colorectal cancer mortality in Latin America between 1990 and 2019, identifying differences by human development categories.

METHODS

We extracted age-adjusted mortality rate from the Global Burden of Disease (GBD) Study from 22 Latin American countries, subregions, and country groups previously ranked by the GBD study due to Sociodemographic Index (SDI) between 1990 and 2019. We applied the segmented regression model to analyze the time trend. Also, we estimated the correlation between mortality rates and Human Development Index (HDI) categories for countries.

RESULTS

Between 1990 and 2019, colorectal cancer adjusted mortality rate increased by 20.56% in Latin America (95% CI 19.75% - 21.25%). Between 1990 and 2004, the average annual percentage change (APC) was 0.11% per year (95% CI 0.10-0.12), and between 2004 and 2019 there was a deceleration (APC = 0.04% per year, 95% CI 0.03%- 0.05%). There is great heterogeneity among the countries of the region. Correlation between these two variables was 0.52 for 1990 and 2019. When separated into HDI groups, the correlation varied in the direction of the association and its magnitude, typifying an effect modification known as Simpson's Paradox.

CONCLUSIONS

Human development factors may be important for assessing variation in cancer mortality on a global scale. Studies that assess the social and -economic contexts of countries are necessary for robust evaluation and provision of preventive, diagnostic and curative services to reduce cancer mortality in Latin America.

Disparities in incidence and trends of colorectal, lung, female breast, and cervical cancers among non-Hispanic American Indian and Alaska Native people, 1999-2018

PURPOSE

This study is the first to comprehensively describe incidence rates and trends of screening-amenable cancers (colorectal, lung, female breast, and cervical) among non-Hispanic AI/AN (NH-AI/AN) people.

METHODS

Using the United States Cancer Statistics AI/AN Incidence Analytic Database, we, calculated incidence rates for colorectal, lung, female breast, and cervical cancers for NH-AI/AN and non-Hispanic White (NHW) people for the years 2014-2018 combined. We calculated age-adjusted incidence rates (per 100,000), total percent change in incidence rates between 1999 and 2018, and trends over this time-period using Joinpoint analysis. Screening prevalence by region was calculated using Behavioral Risk Factor Surveillance System data.

RESULTS

Rates of screening-amenable cancers among NH-AI/AN people varied by geographic region and age at diagnosis. Over half of all lung and colorectal cancers in NH-AI/AN people were diagnosed at later stages. Rates of lung and colorectal cancers decreased significantly between 1999-2018 among NH-AI/AN men, but no significant changes were observed in rates of screening-amenable cancers among NH-AI/AN women.

CONCLUSION

This study highlights disparities in screening-amenable cancers between NH-AI/AN and NHW people. Culturally informed, community-based interventions that increase access to preventive health services could reduce cancer disparities among AI/AN people.

Barriers to adherence to cytology exam: a case study in low-income Colombian women

BACKGROUND

Cervical cytology is essential for the early detection of cervical cancer. However, in Colombia, only 50% of women with subsidized health insurance were screened in 2019, compared to 100% of women with contributory insurance. This disparity highlights significant barriers that must be addressed. This study aimed to identify the factors that contribute to or hinder adherence to cervical cytology screening among low-income women with subsidized health insurance in a public primary care network in Cali, Colombia, from 2014 to 2018.

METHODS

In a qualitative case study, the experience of women and health care and administrative personnel was recovered. Forty-seven women participated in seven focus group discussions. Five other women using the program participated in in-depth interviews. Finally, we interviewed eight people from the healthcare area and the health services administration. The qualitative data collected underwent content analysis, guided by the theoretical framework of Social Determinants of Health. Within this framework, five interconnected dimensions that influence adherence were incorporated.

RESULTS

Adherence is a multifactorial phenomenon, and in relation to attendance at cervical cytology, the analysis delved into the mechanisms that affect it in a low-income context. Barriers to adherence were identified across multiple dimensions, including social and economic factors, health conditions, and patient-related factors, among both adherent and non-adherent women. Among adherent women, barriers and facilitators related to the healthcare team and system, as well as patient-related factors, were identified.

CONCLUSIONS

The findings of this research can be useful in developing personalized interventions and strategies to improve adherence and screening outcomes in low-income settings. It is necessary to increase the resources of health insurance entities to establish effective communication channels with women who attend the cervical cancer prevention program.

Factors associated with the uptake of clinical breast examination among women of reproductive age in Lesotho: analysis of a national survey

BACKGROUND

In low-resource settings with weak health systems, the WHO recommends clinical breast examination (CBE) as the most cost-effective breast screening modality for women. Evidence shows that biennial CBE leads to significant downstaging of breast cancer in all women. Breast cancer is the second most common cancer among women in Lesotho with a weaker healthcare system and a low breast cancer screening rate. This study investigated the prevalence and factors associated with the uptake of CBE among women of reproductive age in Lesotho.

METHODS

This study used cross-sectional data from the 2014 Lesotho Demographic and Health Survey. A sample of 6584 reproductive-age women was included in this study. We conducted both descriptive and multivariable logistic regression analyses. The study results were presented in frequencies, percentages, and adjusted odds ratios (aOR) with their corresponding confidence intervals (CIs).

RESULTS

The prevalence of CBE uptake was 9.73% (95% CI: 8.91, 10.61). Women who were covered by health insurance (aOR = 2.31, 95% CI [1.37, 3.88]), those who were pregnant (aOR = 2.34, 95% CI [1.64, 3.35]), those who had one to three children (aOR = 1.81, 95% CI [1.29,2.52]), and women who frequently read newspapers or magazines (aOR = 1.33, 95% CI [1.02,1.72]) were more likely to undergo CBE than their counterparts. Women who were aware of breast cancer (aOR = 2.54, 95% CI [1.63,3.97]), those who have ever had breast self-examination (BSE) within the last 12 months prior to the study (aOR = 5.30, 95% CI [4.35,6.46]), and those who visited the health facility in the last 12 months prior to the study (aOR = 1.57, 95% CI [1.27,1.95]) were also more likely to undergo CBE than their counterparts. Women residing in the Qacha's-nek region (aOR = 0.42, 95% CI [0.26,0.67]) were less likely to undergo CBE than those in the Botha-bothe region.

CONCLUSION

The study found a low prevalence of CBE uptake among reproductive-age women in Lesotho. Factors associated with CBE uptake include health insurance coverage, being pregnant, those who had one to three children, exposure to media, breast cancer awareness, ever had BSE, and those who visited a health facility. To increase CBE uptake, these factors should be considered when designing cancer screening interventions and policies in order to help reduce the burden of breast cancer in Lesotho.

Does women's empowerment and their socioeconomic condition affect the uptake of breast cancer screening? Findings from NFHS-5, India

BACKGROUND

Screening for breast cancer results in early diagnosis of the disease and improves survival. However, increasing participation of women in screening programs is challenging since it is influenced by socioeconomic and cultural factors. This study explores the relationship of socioeconomic and women empowerment factors with breast cancer screening uptakes in the states and union territories of India.

METHODS

We used summary reports of secondary data from all the states and union territories based on the fifth wave of the National Family Health Survey in India. This ecological study compares the uptake of breast cancer screening across states of India. We considered socioeconomic status (SES) and women empowerment status (WES) indicators from the survey as independent variables and state-wise breast cancer screening uptake as dependent variables for studying their association. The determinants of breast cancer screening were calculated using a simple linear regression model.

RESULTS

We found that socioeconomic status and women empowerment status moderately correlated with breast cancer screening uptake (correlation coefficient 0.34 and 0.38, respectively). States with higher rates of literacy among women and of women who had their own bank accounts that they decided how to use reported higher uptake of breast cancer screening (p = 0.01 and 0.03, respectively). However, the correlation was not uniform across all the states. The states of Chandigarh, Delhi, Telangana, and Karnataka showed lower participation despite a higher percentage of literate women and women with their own bank accounts.

CONCLUSION

This study indicates that women's literacy and having their own bank account may moderately improve their participation in cancer screening. However, higher SES and WES did not translate into better screening in many of the states. More research is needed, especially for states which had low screening uptake despite relatively higher rates of women empowerment.

Socioeconomic status index is an independent determinant of breast cancer screening practices: Evidence from Eastern China

BACKGROUND

Breast cancer is the most prevalent malignancy affecting Chinese women, and early routine screening is incredibly important for its prevention and control. This study aimed to investigate the role of socioeconomic status (SES) in female breast cancer screening practices using the composite SES index.

METHODS

This cross-sectional study involved 1816 women in Eastern China. Data were collected using an online self-administered questionnaire from January 2020 to May 2021. We used principal component analysis to construct the composite SES index using educational level, annual household income, and occupation. Logistic regression was used to analyze the association between the SES index and breast cancer screening utilization.

RESULTS

Of the participants, 19.27% reported having performed breast self-examination, 12.89% reported having undergone clinical breast examination, and 3.52% reported having received mammography. The SES has a significant influence on the patronage of female breast cancer screening in Eastern China. The composite SES index was found to have a positive and significant association with breast cancer screening practices. An interaction was found between the SES index and patient characteristics, such as health awareness, marital status, and location of residence. In addition, the SES index had a positive effect on breast cancer-related knowledge.

CONCLUSIONS

Socioeconomic inequalities existed in Eastern China and were related to breast cancer screening patronage. The composite SES index was identified as a significant determinant of breast cancer screening practices. Our results highlighted the negative impacts of socioeconomic inequities on female breast cancer screening utilization. This suggests that reducing socioeconomic inequalities in breast cancer screening requires more focused interventions and concerted outreach activities for groups with lower education levels, lower income, or lower occupational classes.

Social Determinants of Cancer Risk Among American Indian and Alaska Native Populations: An Evidence Review and Map

Objectives:

To explore current literature on social determinants of health (SDOH) and cancer among American Indian and Alaska Native (AI/AN) populations.

Methods:

We searched Ovid MEDLINE^®, CINAHL, and PsycINFO databases for articles published during 2000 to 2020, which included terms for SDOH and cancer occurrence in AI/AN populations. We derived the data extraction elements from the PROGRESS-Plus framework. The Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA)-Equity extension guided the evidence map.

Results:

From 2180 screened articles, 297 were included. Most were observational (93.9%), employed a cross-sectional design (83.2%), were categorized as cancer occurrence and surveillance research (62%), and included no cancer-related risk factors (70.7%). Race, gender, and place were the most frequently included PROGRESS-Plus categories. Religion, relationship features, and characteristics of discrimination were least common. Only 12% of articles mentioned historical/current trauma or historical context.

Conclusions:

Gaps exist in our understanding of SDOH as drivers of cancer disparities in AI/AN populations. Future studies in health equity science may incorporate historical and cultural factors into SDOH frameworks tailored for AI/AN populations.

Long-term Mammography Utilization after an Initial Randomized Intervention Period by all Underserved Chilean Women in the Clinics

Chile has one of the highest rates of breast cancer in Latin America. Mammography rates among women, especially those of low socioeconomic status (SES), are thought to contribute to high breast cancer morbidity and mortality. A successful randomized controlled trial among women aged 50 to 70 in a low-SES primary care clinic in Chile led to a significant increase in mammography screening rates in a two-year intervention trial. This study assesses the sustainability of the intervention after ten years and identifies factors that might have been associated with a long-term effect using the RE-AIM (Reach, Effectiveness, Adoption, Implementation, Maintenance) framework. The mammography rates among women aged 50 to 70 in the low-SES intervention clinic were compared to two populations of women aged 50 to 70 from middle-SES clinics and to national data. Qualitative data were used to answer questions of adoption, implementation, and maintenance, while quantitative data assessed the reach and effectiveness. After ten years, low-SES women at the intervention clinic maintained significantly higher mammography screening rates vs. middle-SES women at the comparison clinics (36.2% vs. 30.1% and 19.4% p < 0.0001). Women of a low SES at the intervention clinic also had significantly higher screening rates compared to women of a low SES at a national level (44.2% vs. 34.2% p < 0.0001). RE-AIM factors contributed to understanding the long-term difference in rates. Mailed contact, outreach interventions, and the integration of health promoters as part of the Community Advisory Board were important factors associated with the effects observed. This study provides information on factors that could contribute to reducing the social gap on breast cancer screening.

Understanding no-show behaviour for cervical cancer screening appointments among hard-to-reach women in Bogotá, Colombia: A mixed-methods approach

The global burden of cervical cancer remains a concern and higher early mortality rates are associated with poverty and limited health education. However, screening programs continue to face implementation challenges, especially in developing country contexts. In this study, we use a mixed-methods approach to understand the reasons for no-show behaviour for cervical cancer screening appointments among hard-to-reach low-income women in Bogotá, Colombia. In the quantitative phase, individual attendance probabilities are predicted using administrative records from an outreach program (N = 23384) using both LASSO regression and Random Forest methods. In the qualitative phase, semi-structured interviews are analysed to understand patient perspectives (N = 60). Both inductive and deductive coding are used to identify first-order categories and content analysis is facilitated using the Framework method. Quantitative analysis shows that younger patients and those living in zones of poverty are more likely to miss their appointments. Likewise, appointments scheduled on Saturdays, during the school vacation periods or with lead times longer than 10 days have higher no-show risk. Qualitative data shows that patients find it hard to navigate the service delivery process, face barriers accessing the health system and hold negative beliefs about cervical cytology.

Radiology volunteers to support a breast cancer screening program in Peru: Description of the project, preliminary results, and impressions

Breast cancer is the second most common cancer in Peruvian women. Due to limitations in national breast cancer screening programs, especially in rural areas, more than 50% of cases of breast cancer in Peru are diagnosed in advanced stages. In collaboration with a local clinic registered as a nongovernmental organization (CerviCusco), RAD-AID International aims to create a sustainable diagnostic structure to improve breast cancer screening in Cuzco. With the support of local, national, and international partners that have collaborated in analyzing radiological resources, raising awareness in the population, acquiring equipment, training clinical staff, and building referral networks, our teams of radiologists, included in the RAD-AID team, have participated in training CerviCusco staff in breast ultrasound, thus enabling additional training for radiology residents through a regulated international collaboration.

A scoping review of social relationships and prostate cancer screening

According to current US recommendations, the choice to undergo screening for prostate cancer should be an individual one, after considering with a clinician the balance of harms and benefits, and the values and preferences in the decision. Social relationships may influence such a decision. The purpose of this scoping review was to map the evidence on the association between social relationships and prostate cancer screening in the epidemiological literature and to highlight gaps in knowledge. We performed a systematic search of all relevant articles published up to February 1st 2021. We used variations in search terms related to prostate cancer screening, as well as indicators of social relationships. From the 908 records identified, 19 studies, published in 2007-2020, were included. The most common indicator of social relationships was marital status. Overall, married men or men with a partner had a higher screening uptake. Church attendance, based on studies conducted in the United states, was also associated with screening. We found little evidence linking screening with parenthood status or perceived social support. The overall evidence points to a potentially causal association between social relationships and men's decision to undergo prostate cancer screening. More research is needed on the underlying mechanisms and on the potential barriers and facilitators for screening.

Trends in cervical cancer screening rates among Korean women: results of the Korean National Cancer Screening Survey, 2005–2020

Objective

This study aimed to analyze the trends in cervical cancer screening rates, including organized and opportunistic cancer screening rates, with the Papanicolaou test among Korean women.

Methods

Data were collected from a nationwide, cross-sectional, Korean National Cancer Screening Survey. To evaluate the cervical cancer screening rates, we used the screening approach of “cervical cancer screening rate with recommendation,” defined as the proportion of women who underwent the Papanicolaou test during the previous 2 years according to the Protocol of National Cancer Screening Program for Cervical Cancer in Korea. The joinpoint regression analysis, which describes the annual percent change (APC), was performed to detect significant changes in cervical cancer screening rates in women aged 30-74 years during 2005-2020.

Results

The cervical cancer screening rate was 56.0% in 2020. From 2005 to 2013, there was a rising trend in cervical cancer screening rates (APC=2.70%, 95% confidence interval [CI]:1.05 to 4.38), followed by a falling trend (APC=−2.67%, 95% CI:−4.3 to −1.01). The falling trend was significantly associated with age (≥40 years), education level (below the 15th grade), household income (below the middle-income level), and residence (all residential areas).

Conclusion

The recent falling trend was more common in women with a low socioeconomic status, which suggests that there is a socioeconomic gap in cervical cancer screening. Moreover, young women in their thirties had a low screening rate. Therefore, an active participation strategy for women vulnerable to cervical cancer is required.

We evaluated trends in cervical cancer screening rates in women aged 30–74 years in 2005–2020. The screening rate rose from 57.0% in 2005 to 67.0% in 2013, and then 56.0% in 2020. The falling trend in the screening rate was significantly associated with low household income, low education level, and all residential areas (especially rural areas).

Impact of a culturally tailored informative video on cervical cancer: a pilot study with Amazonian women in treatment for cervical cancer

The present study is a randomised pilot study that evaluated a culturally tailored video promoting information about cervical cancer (CC), developed with Amazonian women in treatment for CC. The sample included 63 patients in treatment for CC who were randomly assigned to three groups of 21 patients. The experimental group watched an informative video about CC. The active control group watched a video on healthy habits and the passive control group received no intervention. The groups were compared in terms of change in knowledge and illness perceptions, over time. The results showed that the experimental group was the only one with a significant increase in knowledge (β = .166; p = .03) that was not maintained over time (β = -.195; p = .04). Threatening illness perceptions about the disease increased in all groups over time (β = .105; p = .001). Future studies should replicate the results testing the efficacy of an audiovisual strategy in a larger sample, in health services that serve populations with similar social and cultural characteristics. This study emphasises the importance of interprofessional oncology teams providing clear information regarding CC, during all stages of the disease, and patients' treatment.Impact StatementWhat is already known on this subject? Latin American countries, such as Brazil, the low coverage of screening for CC can be related to the low education of women and their difficulty of access to health care. Hence, educational interventions may be a good strategy to reinforce the importance of screening and increase knowledge about illness prevention and treatment.What the results of this study add? An audiovisual informational intervention on CC was developed, addressing prevention, causes, control, consequences and treatment while respecting the patients' cultural and social reality through an approach that is simple and easy to understand. The group that watched the informative video was the only one that increased knowledge, revealing that it was a good CC informational strategy.What are the implications of these findings for clinical practice and/or further research? This study confirmed the importance of developing informational and educational strategies that are appropriate to patients' social and cultural reality. The video is now available to health teams in primary, secondary and tertiary care units, as a strategy for health promotion and CC prevention.

Cervical cancer guidelines, prevention and screening strategies: experiences from Brazil and Chile

This article analyzes cervical cancer control policies and actions in Brazil and Chile, focusing on prevention and screening. We adopted a comparative approach to identify similarities and differences in guidelines and cervical cancer prevention and screening strategies between the two countries. We used the following data collection techniques: analysis of official documents and secondary data, consultations with experts, government officials and program coordinators, and literature review. The findings show that Chile has a well-structured program with centralized decision-making and a system that permits monitoring of actions. Brazil on the other hand faces ongoing issues with lack of coordination and shortcomings in the follow-up of women with abnormal test results. The following challenges to consolidating cervical cancer screening stand out in Brazil: lack of active tracking of the target population; absence of a test quality assurance system; and inadequate follow-up of women with abnormal test results. Both countries need to increase coverage and implement organized screening.

Cervical cancer testing among women aged 30-49 years in the WHO European Region

Background

Screening programs play an important role in a comprehensive strategy to prevent cervical cancer, a leading cause of death among women of reproductive age. Unfortunately, there is a dearth of information about rates of cervical cancer testing, particularly in Eastern Europe and Central Asia where levels of cervical cancer are among the highest in the WHO European Region. The purpose of this article is to report on the lifetime prevalence of cervical cancer testing among females aged 30–49 years from across the WHO European region, and to describe high-level geographic and socioeconomic differences.

Methods

We used data from the European Health Information Survey and the WHO STEPwise approach to Surveillance survey to calculate the proportions of women who were tested for cervical cancer.

Results

The percentage of tested women ranged from 11.7% in Azerbaijan to 98.4% in Finland, with the lowest percentages observed in Azerbaijan, Tajikistan and Uzbekistan. Testing was lower in Eastern Europe (compared to Western Europe), among low-income countries and among women with lower levels of education.

Conclusion

Effective cervical cancer screening programs are one part of a larger strategy, which must also include national scale-up of human papilloma virus vaccination, screening and treatment.

Socioeconomic Determinants of Participation in Cancer Screening in Argentina: A Cross-Sectional Study

Low socioeconomic status is associated with late cancer diagnosis and mortality in Argentina. It is important that cancer screening services are accessible to the whole population so that cancer can be detected early. Our aim in this study was to investigate socioeconomic determinants for the disparities in the use of breast, cervical, and colorectal cancer screening services in Argentina, and to measure the country progress in reducing differences in cancer screening participation across socioeconomic levels. We performed a secondary analysis of cross-sectional data from the 2018 National Survey of Risk Factors of Argentina. The sample included data from 49,170 households. We also compared the results with data from the 2013 wave of the same survey in order to assess progress on cancer screening participation across income and education categories. Income, education, health insurance, disability, and marital status were associated with cancer screening underuse in Argentina. Comparison between 2013 and 2018 demonstrated that there has been some progress toward increasing cancer screening uptake, but this increase is not equitably distributed across the population. To further reduce disparities in cancer participation across socioeconomic levels, cancer screening programs in Argentina should reinforce strategies to become more accessible. It is important to proactively reach those populations that are underusers of cancer screening and ensure that barriers that stop people from accessing cancer screening are explored and adequately addressed.

Geographic disparities of breast cancer incidence in Portugal at the district level: A spatial age-period-cohort analysis, 1998-2011

BACKGROUND

Breast cancer is the most common malignancy in women world-wide and the most common cause of cancer deaths, which can often be managed with early diagnosis and subsequent treatment. Here, we focus on geographic disparities in incidence within Portugal for three age groups of women (30-49; 50-69; 70-84 years).

METHODS

Age-period-cohort (APC) models are widely used in cancer surveillance, and these models have recently been extended to allow spatially-varying effects. We apply novel spatial APC models to estimate relative risk and age-adjusted temporal trends at the district level for the 20 districts in Portugal. Our model allows us to report on country-wide trends, but also to investigate geographic disparities between districts and trends within districts.

RESULTS

Age-adjusted breast cancer incidence was increasing over 1998-2011 for all three age groups and in every district in Portugal. However, we detect spatially-structured between-district heterogeneity in relative risk and age-adjusted trends (Net Drifts) for each of the three age groups, which is most pronounced in the highly-screened (50-69yo) and late-onset (70-84yo) groups of women.

CONCLUSIONS

We present evidence of disparities in breast cancer incidence at a more granular geographic level than previously reported. Some disparities may be due to latent risk factors, which cannot be accounted for by age, birth year, and geographic location alone.

IMPACT

Our study motivates resuming data collection for breast cancer incidence at the district level in Portugal, as well as the study of exogenous risk factors.

Association of Life-Course Educational Attainment and Breast Cancer Grade in the MEND Study

Background:

Nigeria reports the highest age-standardized mortality rate for breast cancer (BC) among African countries and disproportionately high rates of high-grade cancer. Histological grade is a strong predictor of mortality, and evidence suggests that educational attainment influences cancer outcomes.

Objective:

We characterize the association between educational trends across the life-course and BC grade at diagnosis.

Methods:

Data on 224 BC patients enrolled in the Mechanisms for Established and Novel Risk Factors for Breast Cancer in Nigerian Women (MEND) study was analyzed. Participant and parental (mother and father) education was categorized as low (primary school or less) or high (secondary school or greater). Accordingly, the educational trend across the life-course was determined for each participant relative to each parent: stable high, increasing, decreasing, or stable low. BC grade was classified as high (grade 3) or low (grades 1–2).

Findings:

About 34% of participants, 71% of fathers, and 85% of mothers had low education. Approximately one-third of participants were diagnosed with high-grade BC. Participants with low-grade BC were more likely to have highly educated fathers (p = 0.04). After adjusting for age, comorbidities, marital status and mammogram screening, participants with highly educated fathers were 60% less likely to have high-grade BC (aOR 0.41; 95% CI 0.20 to 0.84) compared to those with less-educated fathers. Stable high life-course education relative to father was also associated with a significantly lower likelihood of having high-grade BC (aOR 0.36; 95% CI 0.15 to 0.87) compared to stable low life-course education. No significant associations were observed for the participant’s education, mother’s education, or life-course education relative to mother.

Conclusions:

Early-life socioeconomic status (SES) may influence BC grade. This deserves further study to inform policies that may be useful in reducing high-grade BC in Nigeria.

Radiology volunteers to support a breast cancer screening program in Peru: description of the project, preliminary results, and impressions

Breast cancer is the second most common cancer in Peruvian women. Due to limitations in national breast cancer screening programs, especially in rural areas, more than 50% of cases of breast cancer in Peru are diagnosed in advanced stages. In collaboration with a local clinic registered as a nongovernmental organization (CerviCusco), RAD-AID International aims to create a sustainable diagnostic structure to improve breast cancer screening in Cuzco. With the support of local, national, and international partners that have collaborated in analyzing radiological resources, raising awareness in the population, acquiring equipment, training clinical staff, and building referral networks, our teams of radiologists, included in the RAD-AID team, have participated in training CerviCusco staff in breast ultrasound, thus enabling additional training for radiology residents through a regulated international collaboration.

Breast cancer screening adherence rates and barriers of implementation in ethnic, cultural and religious minorities: A systematic review

Breast cancer is the most common cancer affecting women worldwide. Adherence to breast cancer screening guidelines is frequently lower in racial, ethnic and cultural minority populations and is affected by potential inequities or barriers to screening that these minorities face. Therefore, the aim of the present study was to collect information from different minority groups worldwide, assess adherence to breast cancer screening and evaluate barriers or limitations causing non-adherence, which should facilitate the development of effective interventions. A search was conducted through PubMed and Web of Science. Studies were considered as eligible if they met the following criteria: i) Female patients; ii) breast cancer screening program implemented in the country; iii) minority groups; iv) asymptomatic; v) report written in Portuguese or English; vi) study published from 2015 onwards. The Critical Appraisal Skills Programme checklist was used for qualitative studies and the Strengthening The Reporting of Observational Studies in Epidemiology checklist for cross-sectional studies. From the 348 initial articles, 86 were removed due to duplication and 19 were selected, analyzed and summarized, accordingly. Of the 19 studies included, 5.3% were classified as high quality, 52.6% as moderate to high and 42.1% as moderate. A total of 15 studies were cross-sectional and 4 were qualitative, collectively including 250,733 women. The rate of adherence to mammogram in different minorities was evaluated, obtaining a mean value of 49.7% in the last 2 years, and statistically significant barriers were selected and divided into sociodemographic; personal; ethnic, cultural and religious; and external factors. The characteristics of each population play a major role in the population's breast health practices. If the population, adherence rates, barriers and inequities are carefully studied, screening models may be customized and participation to breast cancer screening can be optimized, thereby reducing the high breast cancer-associated mortality.

The Prevalence and Associated Factors of Cancer Screening Uptake Among a National Population-Based Sample of Adults in Marshall Islands

Background:

The study aimed to estimate the prevalence and associated factors of cancer screening among men and women in the general population in Marshall Islands.

Methods:

The national cross-sectional sub-study population consisted of 2,813 persons aged 21-75 years (Median = 37.4 years) from the “2017/2018 Marshall Islands STEPS survey”. Information about cancer screening uptake included Pap smear or Vaginal Inspection with Acetic Acid (=VIA), clinical breast examination, mammography, faecal occult blood test (FOBT), and colonoscopy.

Results:

The prevalence of past 2 years mammography screening was 21.7% among women aged 50-74 years, past year CBE 15.9% among women aged 40 years and older, past 3 years Pap smear or VIA 32.6% among women 21-65 years, past year FOBT 21.8% among women and 22.3% among men aged 50-75 years, and past 10 years colonoscopy 9.1% among women and 7.3% among men aged 50-75 years. In adjusted logistic regression, cholesterol screening (AOR: 1.91, 95% CI: 1.07-3.41) was associated with past 2 years mammography screening among women aged 50-74 years. Blood pressure screening (AOR: 2.39, 95% CI: 1.71-3.35), glucose screening (AOR: 1.59, 95% CI: 1.13-2.23), dental visit in the past year (AOR: 1.51, 95% CI: 1.17, 1.96), binge drinking (AOR: 1.88, 95% CI: 1.07-3.30), and 2-3 servings of fruit and vegetable consumption a day (AOR: 1.42, 95% CI: 1.03-1.95) were positively and high physical activity (30 days a month) (AOR: 0.56, 95% CI: 0.41-0.76) was negatively associated with Pap smear or VIA screening among women aged 21-65 years. Higher education (AOR: 2.58, 95% CI: 1.02-6.58), and cholesterol screening (AOR: 2.87, 95% CI: 1.48-5.59), were positively and current smoking (AOR: 0.09, 95% CI: 0.01-0.65) was negatively associated with past 10 years colonoscopy uptake among 50-75 year-olds.

Conclusion:

The study showed a low cancer screening uptake, and several factors were identified that can assist in promoting cancer screening in Marshall Islands.

A National Study of Colorectal Cancer Survivorship Disparities: A Latent Class Analysis Using SEER (Surveillance, Epidemiology, and End Results) Registries

Introduction: Long-standing disparities in colorectal cancer (CRC) outcomes and survival between Whites and Blacks have been observed. A person-centered approach using latent class analysis (LCA) is a novel methodology to assess and address CRC health disparities. LCA can overcome statistical challenges from subgroup analyses that would normally impede variable-centered analyses like regression. Aim was to identify risk profiles and differences in malignant CRC survivorship outcomes. Methods: We conducted an LCA on the Surveillance, Epidemiology, and End Results data from 1975 to 2016 for adults ≥18 (N = 525,245). Sociodemographics used were age, sex/gender, marital status, race, and ethnicity (Hispanic/Latinos) and stage at diagnosis. To select the best fitting model, we employed a comparative approach comparing sample-size adjusted BIC and entropy; which indicates a good separation of classes. Results: A four-class solution with an entropy of 0.72 was identified as: lowest survivorship, medium-low, medium-high, and highest survivorship. The lowest survivorship class (26% of sample) with a mean survival rate of 53 months had the highest conditional probabilities of being 76-85 years-old at diagnosis, female, widowed, and non-Hispanic White, with a high likelihood with localized staging. The highest survivorship class (53% of sample) with a mean survival rate of 92 months had the highest likelihood of being married, male with localized staging, and a high likelihood of being non-Hispanic White. Conclusion: The use of a person-centered measure with population-based cancer registries data can help better detect cancer risk subgroups that may otherwise be overlooked.

Social determinants of mammography screening among women aged 50 to 59, Peru 2015

Breast cancer (BC) screening could reduce its mortality; however, its access is influenced by societal forces. Our objective is to identify the social determinants associated with mammography screening (MS) in women aged 50 to 59 in Peru. In this cross-sectional analysis of the Peruvian Demographic Health Survey, 2015, MS within the past two years was evaluated through self-report. Prevalence for MS was 21.9% [95% CI: 18.9 to 25.1]. The average age was 54 years (s.d.: 2.5). The higher the socioeconomic status, the higher the prevalence of screening (3.2% vs 41.4% in extreme quintiles, p < .001). In the adjusted models, higher socioeconomic status (PR: 5.81, 95% CI: 2.28 to 14.79), higher education level (PR: 2.03, 95% CI: 1.30 a 3,15) and having health insurance from the Ministry of Health (PR: 2.21, 95% CI: 1.28 to 3.82) and EsSalud (PR: 4.37, 95% CI: 2.67 to 7.15), were positively associated with MS. Social inequalities in screening access exist and might translate into inequalities in cancer morbidity and mortality. The Peruvian government urgently needs to improve screening rates in these vulnerable populations.

Socio-demographic inequalities in the uptake of Papanicolaou tests in Peru: analysis of the 2015-2017 Demographic and Family Health Survey

OBJECTIVES

This study was conducted to analyze the inequalities in Papanicolaou test (also referred to as the Pap smear) uptake according to the socio-demographic characteristics of Peruvian women 30 years to 59 years of age using information from the 2015-2017 Demographic and Family Health Survey (ENDES, acronym in Spanish).

METHODS

This is an analytical, cross-sectional study based on information acquired from the 2015-2017 ENDES surveys. Socio-demographic characteristics were reported using absolute frequencies and weighted proportions with 95% confidence intervals, considering results with a p-value <0.05 as statistically significant. Concentration curves (CCs) and concentration indices (IndCs) were created based on the interaction of the wealth index and uptake of Pap smears, taking into account the different characteristics of the population studied for the measure of inequalities.

RESULTS

All the CCs were distributed below the line of equality. Similarly, all the IndCs were higher than zero, indicating inequality in the uptake of Pap smears, favoring those with a higher wealth index. The highest IndC values were obtained from women aged 50-59 (IndC, 0.293), those who lived in the jungle (IndC, 0.230), and those without health insurance (IndC, 0.173).

CONCLUSIONS

We found socio-demographic inequalities in the uptake of Pap smears in Peru, favoring women with a higher wealth index. More funding is needed to promote cervical cancer screening programs and to create systems that ensure equal access to healthcare in Peru.