Explaining variation across grantees in breast and cervical cancer screening proportions in the NBCCEDP

Utilization and outcomes of serial cervical cancer screening in a National Breast and Cervical Cancer Early Detection Program (NBCCEDP) in a non-Medicaid expansion state

PURPOSE

Since 1990, the Centers for Disease Control and Prevention's National Breast and Cervical Cancer Early Detection Program (NBCCEDP) has offered free cervical cancer screening to low-income, uninsured patients, increasing single time point screening and early detection rates. Little is known about NBCCEDP's longitudinal effectiveness. The objective of this study was to assess utilization of Kansas's NBCCEDP, early detection works (EDW) for one-time versus serial screening and compare rates of cervical dysplasia between groups.

METHODS

A retrospective cohort study was conducted among patients who received cervical cancer screening through EDW from 2001 to 2021. Demographic factors, Papanicolaou (Pap) test, and human papillomavirus (HPV) results were compared between patients with one screening versus multiple. Descriptive statistics were performed.

RESULTS

From 2014 to 2021, 3.71-7.06% of eligible patients completed screening through EDW annually. 17.4% of 58,582 eligible patients were up-to-date with screening in 2020. Rural patients and those under age forty were less likely to have EDW screening. Of 43,916 ever-screened patients, 14,638 (33.3%) received multiple screenings. 77% of patients did not have HPV testing; rates were lower in serially screened patients. Cervical dysplasia rates differed minimally between groups.

CONCLUSION

Despite screening 24,017 patients over 7 years, EDW maintains up-to-date screening for under one-fourth of eligible Kansans. Young and rural patients less frequently access EDW. HPV testing is underutilized, which limits the negative predictive value of screening. Serial screening is largely used by low-risk patients currently. Identification and prioritization of serial screening in high risk could increase program impact.

Estimating uninsured and underinsured women eligible for Minnesota's Breast Cancer Screening Program

Since its inception in 1991, the mission of the National Breast and Cervical Cancer Early Detection Program's (NBCCEDP) mission is to improve access to mammography. This program has demonstrated evidence showing that it has improved breast cancer screening rates for women who are uninsured and underinsured. However, the literature has shown that NBCCEDP screenings are decreasing, and only reach a portion of eligible women. Reliable estimates at the sub-county level are needed to identify and reach eligible women. Our work builds upon previous estimates by integrating uninsured and insurance status into spatially adaptive filters. We use spatially adaptive filters to create small area estimates of standardized incidence ratios describing the utilization rate of NBCCEDP services in Minnesota. We integrate the American Community Survey (2010-2014) insurance status data to account for the percentage that an individual is uninsured. We test five models that integrate insurance status by age, sex, and race/ethnicity. Our composite model, which adjusts for age, sex, and race/ethnicity insurance statuses, reduces 95% of the estimation error. We estimate that there approximately 49,913.7 women eligible to receive services for Minnesota. We also create small geography (i.e., county and sub-county) estimates for Minnesota. The integration of the insurance data improved our utilization estimate. The development of these methods will allow state programs to more efficiently use their resources and understand their reach.

Estimating Uninsured and Underinsured Women Eligible for Minnesota's Breast Cancer Screening Program

The mission of the National Breast and Cervical Cancer Early Detection Program's (NBCCEDP) mission is to improve access to mammography and other health services for underserved women. Since its inception in 1991, this national program has improved breast cancer screening rates for women who are uninsured and underinsured. However, the literature has shown that NBCCEDP screenings are decreasing, and only reach a portion of eligible women. Reliable estimates at the sub-county level are needed to identify and reach eligible women. Our work builds upon previous estimates by integrating uninsured and insurance status into spatially adaptive filters. We use spatially adaptive filters to create small area estimates of standardized incidence ratios describing the utilization rate of NBCCEDP services in Minnesota. We integrate the American Community Survey (2010-2014) insurance status data to account for the percentage that an individual is uninsured. We test five models that integrate insurance status by age, sex, and race/ethnicity. Our composite model, which adjusts for age, sex, and race/ethnicity insurance statuses, reduces 95% of the estimation error. We estimate that there approximately 49,913.7 women eligible to receive services for Minnesota. We also create small geography (i.e., county and sub-county) estimates for Minnesota. The integration of the insurance data improved our utilization estimate. The development of these methods will allow state programs to more efficiently use their resources and understand their reach.

The effect of pre-aggregation scale on spatially adaptive filters

Choropleth mapping continues to be a dominant mapping technique despite suffering from the Modifiable Areal Unit Problem (MAUP), which may distort disease risk patterns when different administrative units are used. Spatially adaptive filters (SAF) are one mapping technique that can address the MAUP, but the limitations and accuracy of spatially adaptive filters are not well tested. Our work examines these limitations by using varying levels of data aggregation using a case study of geocoded breast cancer screening data and a synthetic georeferenced population dataset that allows us to calculate SAFs at the individual-level. Data were grouped into four administrative boundaries (i.e., county, Zip Code Tabulated Areas, census tracts, and census blocks) and compared to individual-level data (control). Correlation assessed the similarity of SAFs, and map algebra calculated error maps compared to control. This work describes how pre-aggregation affects the level of spatial detail, map patterns, and over and under-prediction.

Novel mapping methods to describe utilization of free breast cancer screening from a state program

Introduction

The National Breast and Cervical Cancer Early Detection Program (NBCCEDP) is a cancer screening program whose mission is to reduce cancer morbidities for uninsured and underinsured women. A primary activity is to connect women to breast cancer screening. The eligible population and utilization of NBCCEDP screening services have never been quantified at a sub-state level, which hampers effective program evaluation. Here, the Minnesota NBCCEDP, “Sage”, serves as a case study to demonstrate novel spatial analysis methods that depict variation of screening rates at the local level.

Methods

Women who received breast cancer screening through Sage between 2011 and 2015 were geocoded (N = 74,712 screenings); analysis occurred between 2017 and 2019. We determine an eligible population using a synthetic population dataset that provides geographic residence and demographic information. We introduce a novel spatial analysis technique, spatially adaptive filters (SAFs), to create a utilization map of Sage breast screening services by Minnesota women.

Results

Between 2011 and 2015, an average of 36,979 women per year were eligible for NBCCEDP breast cancer screening services, representing 3% of the Minnesota female population 40 and older. For Minnesota NBCCEDP eligible women, the state average breast cancer screening utilization rate was 37.2%, but varied considerably by local regions within the state (range 0% to 131%, SD = 18.7%).

Conclusions

This geospatial model estimated screening service utilization at the local level and enables Minnesota’s Sage program to target specific areas they have yet to reach. Similar programs could employ this model to direct program activities.

Awardee-specific economic costs of providing cancer screening and health promotional services to medically underserved women eligible in the National Breast and Cervical Cancer Early Detection Program

OBJECTIVES

To estimate awardee-specific costs of delivering breast and cervical cancer screening services in their jurisdiction and to assess potential variation in the cost of key activities across awardees.

METHODS

We developed the cost assessment tool to collect resource use and cost data from the National Breast and Cervical Cancer Early Detection Program awardees for 3 years between 2006 and 2010 and generated activity-based cost estimates. We estimated awardee-specific cost per woman served for all activities, clinical screening delivery services, screening promotion interventions, and overarching program support activities.

RESULTS

The total cost per woman served by the awardees varied greatly from $205 (10th percentile) to $499 (90th percentile). Differences in the average (median) cost per person served for clinical services, health promotion interventions, and overarching support activities ranged from $51 to $125.

CONCLUSIONS

The cost per woman served varied across awardee and likely reflected underlying differences across awardees in terms of screening infrastructure, population served, and barriers to screening uptake. Collecting information on contextual factors at the awardee, health system, provider, and individual levels may assist in understanding this variation in cost.

Developing a Web-Based Cost Assessment Tool for Colorectal Cancer Screening Programs

Introduction

We developed a web-based cost assessment tool (CAT) to collect cost data as an improvement from a desktop instrument to perform economic evaluations of the Centers for Disease Control and Prevention’s (CDC’s) Colorectal Cancer Control Program (CRCCP) grantees. We describe the development of the web-based CAT, evaluate the quality of the data obtained, and discuss lessons learned.

Methods

We developed and refined a web-based CAT to collect 5 years (2009–2014) of cost data from 29 CRCCP grantees. We analyzed funding distribution; costs by budget categories; distribution of costs related to screening promotion, screening provision, and overarching activities; and reporting of screenings for grantees that received funding from non-CDC sources compared with those grantees that did not.

Results

CDC provided 85.6% of the resources for the CRCCP, with smaller amounts from in-kind contributions (7.8%), and funding from other sources (6.6%) (eg, state funding). Grantees allocated, on average, 95% of their expenditures to specific program activities and 5% to other activities. Some non-CDC funds were used to provide screening tests to additional people, and these additional screens were captured in the CAT.

Conclusion

A web-based tool can be successfully used to collect cost data on expenditures associated with CRCCP activities. Areas for future refinement include how to collect and allocate dollars from other sources in addition to CDC dollars.

Racial/Ethnic Disparities in Cervical Cancer Screening Services Among Contractors of the Connecticut Breast and Cervical Cancer Early Detection Program

Purpose: Racial/ethnic minority women are at increased risk for cervical cancer. The objective of this study is to use performance management data from the Connecticut Breast and Cervical Cancer Early Detection Program (CBCCEDP) to determine whether race/ethnicity disparities exist in human papillomavirus (HPV) co-testing uptake across CBCCEDP contractors.

Methods: Secondary analysis of Connecticut's Minimum Data Elements data for 2013–2015 among 10 contractors participating in the CBCCEDP. Participants included women aged 30–64 years and eligible to receive routine cervical cancer screening services through the CBCCEDP (n=5,262). HPV co-testing uptake was compared across contractors and race/ethnicity groups within each contractor using chi-square and Fisher's exact tests as appropriate.

Results: Overall, 62.9% of women received HPV co-testing services. Significant differences in co-testing rates were detected between racial/ethnic groups when data were examined across all contractors (p<0.001). Black women were least likely to receive co-testing (49.1%), while Hispanic women were most likely to receive co-testing (68.2%). When data were examined at the individual contractor level, significant differences between racial/ethnic groups were observed in 50% of the contractors.

Conclusions: This study identified racial/ethnic disparities in uptake of HPV co-testing both overall and within individual contractors involved in the CBCCEDP. These findings will be used to guide program improvement with the goal of increasing quality and consistency of care for all women seeking screening services.

Cervical cancer screening of underserved women in the United States: results from the National Breast and Cervical Cancer Early Detection Program, 1997-2012

OBJECTIVE

The National Breast and Cervical Cancer Early Detection Program (NBCCEDP) provides breast and cervical cancer screens to low-income, uninsured, and underinsured women. We describe the number and proportion of women eligible for cervical cancer screening services and the proportion of eligible women screened over the period 1997-2012.

METHODS

Low-income, uninsured, and underinsured women aged 18-64 years who have not had a hysterectomy are eligible for cervical cancer screening through the NBCCEDP. We estimated the number of low-income, uninsured women using data from the US Census Bureau. We adjusted our estimates for hysterectomy status using the National Health Interview Survey and the Behavioral Risk Factor Surveillance System. We used data from the NBCCEDP to describe the number of women receiving NBCCEDP-funded screening and calculated the proportion of eligible women who received screening through the NBCCEDP at the national level (by age group, race/ethnicity) and at the state level by age group. We used the Medical Expenditure Panel Survey to estimate the proportion of NBCCEDP-eligible women who were screened outside the NBCCEDP and the proportion that are not screened.

RESULTS

We estimate that in 2010-2012, 705,970 women aged 18-64 years, 6.5 % (705,970 of 9.8 million) of the eligible population, received NBCCEDP-funded Pap tests. We estimate that 60.2 % of eligible women aged 18-64 years were screened outside the NBCCEDP and 33.3 % were not screened. The NBCCEDP provided 623,603 screens to women aged 40-64 years, an estimated 16.5 % of the eligible population, and 83,660 screens to women aged 18-39 years, representing an estimated 1.2 % of the eligible population. The estimated proportions of eligible women screened in each state ranged from 1.5 to 32.7 % and 5 % to 73.2 % among the 18-64 and 40-64 years age groups, respectively. Changes in the proportion of eligible women screened over the study period were nonsignificant.

CONCLUSIONS

Although the program provided cervical screening to over 700,000 women between 2010 and 2012, it served a small percent of those eligible. The proportion of women screened varied substantially across age groups, racial/ethnic groups, and states. Many low-income, uninsured women are not being screened.

Preventing premature deaths from breast and cervical cancer among underserved women in the United States: insights gained from a national cancer screening program

This commentary highlights some of the valuable insights gained from a special collection of papers that utilized data from the National Breast and Cervical Cancer Early Detection Program (NBCCEDP) and appear in this special issue. The data and experiences of the NBCCEDP can inform the identification of new opportunities and directions for meeting the cancer screening needs of underserved women in a complex and changing health care environment.