Population Health Measurement at Centers for Medicare & Medicaid Services: Bridging the Gap Between Public Health and Clinical Quality

As Medicare and Medicaid increasingly shift to alternative payment models focused on population-based payments, there is an urgent need to develop measures of population health that can drive health improvement. In response, an assessment and design project established a framework for developing population health measures from a payer perspective, conducted environmental scans of existing measures and available data infrastructure, and conducted a gap analysis informing measure development and infrastructure needs. The work, summarized here, makes recommendations for creating a set of core measures, demonstrates some of the key challenges in applying a traditional quality measure development framework to population health, and complements recent efforts by the National Academy of Medicine and others with a focus on a payer perspective.

Effect of Patient Navigation on Breast Cancer Screening Among African American Medicare Beneficiaries: A Randomized Controlled Trial

BACKGROUND

There is growing evidence that patient navigation improves breast cancer screening rates; however, there are limited efficacy studies of its effect among African American older adult women.

OBJECTIVE

To evaluate the effect of patient navigation on screening mammography among African American female Medicare beneficiaries in Baltimore, MD.

DESIGN

The Cancer Prevention and Treatment Demonstration (CPTD), a multi-site study, was a randomized controlled trial conducted from April 2006 through December 2010.

SETTING

Community-based and clinical setting.

PARTICIPANTS

The CPTD Screening Trial enrolled 1905 community-dwelling African American female Medicare beneficiaries who were ≥65 years of age and resided in Baltimore, MD. Participants were recruited from health clinics, community centers, health fairs, mailings using Medicare rosters, and phone calls.

INTERVENTIONS

Participants were randomized to either: printed educational materials on cancer screening (control group) or printed educational materials + patient navigation services designed to help participants overcome barriers to cancer screening (intervention group).

MAIN MEASURE

Self-reported receipt of mammography screening within 2 years of the end of the study.

KEY RESULTS

The median follow-up period for participants in this analysis was 17.8 months. In weighted multivariable logistic regression analyses, women in the intervention group had significantly higher odds of being up to date on mammography screening at the end of the follow-up period compared to women in the control group (odds ratio [OR] 2.26, 95 % confidence interval [CI]1.59-3.22). The effect of the intervention was stronger among women who were not up to date with mammography screening at enrollment (OR 3.63, 95 % CI 2.09-6.38).

CONCLUSION

Patient navigation among urban African American Medicare beneficiaries increased self-reported mammography utilization. The results suggest that patient navigation for mammography screening should focus on women who are not up to date on their screening.

Gender differences in correlates of colorectal cancer screening among Black Medicare beneficiaries in Baltimore

BACKGROUND

Previous research has shown colorectal cancer (CRC) screening disparities by gender. Little research has focused primarily on gender differences among older Black individuals, and reasons for existing gender differences remain poorly understood.

METHODS

We used baseline data from the Cancer Prevention and Treatment Demonstration Screening Trial. Participants were recruited from November 2006 to March 2010. In-person interviews were used to assess self-reported CRC screening behavior. Up-to-date CRC screening was defined as self-reported colonoscopy or sigmoidoscopy in the past 10 years or fecal occult blood testing in the past year. We used multivariable logistic regression to examine the association between gender and self-reported screening, adjusting for covariates. The final model was stratified by gender to examine factors differentially associated with screening outcomes for males and females.

RESULTS

The final sample consisted of 1,552 female and 586 male Black Medicare beneficiaries in Baltimore, Maryland. Males were significantly less likely than females to report being up-to-date with screening (77.5% vs. 81.6%, P = 0.030), and this difference was significant in the fully adjusted model (OR: 0.72; 95% confidence interval, 0.52-0.99). The association between having a usual source of care and receipt of cancer screening was stronger among males compared with females.

CONCLUSIONS

Although observed differences in CRC screening were small, several factors suggest that gender-specific approaches may be used to promote screening adherence among Black Medicare beneficiaries.

IMPACT

Given disproportionate CRC mortality between White and Black Medicare beneficiaries, gender-specific interventions aimed at increasing CRC screening may be warranted among older Black patients.

Abstract B15: Effect of patient navigation on mammography screening among African American female Medicare beneficiaries at risk for low health literacy

Context: African American older adult women are diagnosed with more advanced breast cancer and have lower survival rates than White women. While differences in health literacy may contribute to this disparity, there is limited information on intervention strategies to promote cancer screening among low-literate African American older adults.

Objective: To evaluate the effect of a patient navigator on adherence to mammography screening among African American female Medicare beneficiaries with low literacy scores. Design, Setting, and Participants: We analyzed data from the Cancer Prevention and Treatment Demonstration (CPTD) at Johns Hopkins, an ongoing community-based trial designed to determine whether patient navigation is an effective strategy for improving adherence to cancer screening among African American older adults. Participants are randomized to either a high intensity group (patient navigation = educational materials) or a low intensity group (educational materials only). This analysis included 272 women ages of 65 and older with low literacy scores, who were enrolled into the study between November 2006 and March 2010, and had at least one year of follow up data. Baseline and one year follow up interviews were conducted face to face by trained interviewers through standardized questionnaires. The REALM-R instrument was used to identify participants at risk for low health literacy, based on their score.

Main Outcome Measure: The outcome measure for this analysis was the between-group difference in the proportion of women receiving mammography screening during the follow up period. Multiple logistic regression was performed to control for potential confounders such as age, education, Medicaid coverage, and perceived health status.

Results: Compared to the educational materials only group (n=77), the patient navigation group (n=107) had a similar proportion of women who reported a mammogram at one year follow up (64% vs. 71 %, p-value = 0.32). However, after adjusting for baseline health and demographic characteristics, women in the patient navigation group were more likely to report a mammogram at one year follow up, compared to those in the educational materials group (OR 1.90 95% CI 1.01-3.54). Women who rated themselves as having excellent to good health at baseline were less likely to report a mammogram, than those who reported fair to poor health (OR 0.43 95% CI 0.21-0.87).

Conclusions: Use of a patient navigation-based intervention was positively associated with mammography screening adherence among African American older adult women with low literacy scores. In this study population, perception of health status may influence mammography screening adherence. Our findings underscore the need for tailored intervention strategies to reduce cancer screening disparities among low-literate African American older adults.

Citation Information: Cancer Epidemiol Biomarkers Prev 2010;19(10 Suppl):B15.

Association between lifestyle factors and CpG island methylation in a cancer-free population

BACKGROUND

Many risk factors have been associated with cancer, such as age, family history, race, smoking, high-fat diet, and poor nutrition. It is important to reveal the molecular changes related to risk factors that could facilitate early detection, prevention, and overall control of cancer.

METHODS

We selected six cancer-specific methylated genes that have previously been reported in primary tumors and have also been detected in different bodily fluids of cancer patients. Here, we used quantitative fluorogenic real-time methylation-specific PCR in plasma DNA samples for the detection of methylation changes from an asymptomatic population who do not have any known cancer.

RESULTS

The promoter methylation frequencies of the studied genes were as follows: APC (7%), CCND2 (22%), GSTP1 (2%), MGMT (9%), RARbeta2 (29%), and P16 (3%). Promoter methylation of at least one of the genes analyzed was observed in approximately 46% (72 of 157) of the samples by binary dichotomization. Promoter hypermethylation of at least two genes was detected in 17% (26 of 157) of the samples. RARbeta2 methylation was observed in 45% of subjects who had a high-fat diet in contrast with those who had a low-fat diet (23%; P = 0.007).

DISCUSSION

Our findings may help to elucidate early methylation changes that may lead to cancer development. These methylation changes could be due to exposure to risk factors and may be useful for cancer prevention measures such as changes in lifestyle. Longitudinal follow-up of a high-risk population is needed to understand the association of methylation of candidate genes in cancer development.

Defining "success" in recruitment of underrepresented populations to cancer clinical trials: moving toward a more consistent approach

Although medically underserved groups bear a heavy burden of cancer disease and governmental agencies have required inclusion of minorities and women in cancer clinical trials since 1993, many of these groups are underrepresented in cancer prevention or treatment clinical trials. To assess and enhance recruitment of underrepresented populations into cancer-related clinical trials, investigators and governmental agencies need consistent measurement approaches for recruitment that can be applied to diverse settings where trials are conducted. We conducted a systematic review to evaluate what measurement approaches were used to evaluate the success of recruitment of underrepresented groups into cancer prevention or treatment trials, and whether these recruitment goals were stated a priori. Only two articles reported an a priori recruitment goal. The recruitment measurement approaches varied considerably, with no consistent standard, especially for individual trials. By using the empiric evidence from this review in conjunction with the National Institutes of Health (NIH) guidelines, we constructed a framework for choosing consistent a priori recruitment goals for underrepresented groups based on the research question and study location. Using consistent measurement approaches for underrepresented groups will improve comparability of recruitment strategies across trials, improve equity in distribution of benefits and burdens of cancer-related clinical trials, and may improve applicability of trial results to multiple populations.