A Review of Research on Disparities in the Care of Black and White Patients With Cancer in Detroit.

Racial disparities in cancer incidence and outcomes are well-documented in the US, with Black people having higher incidence rates and worse outcomes than White people. In this review, we present a summary of almost 30 years of research conducted by investigators at the Karmanos Cancer Institute's (KCI's) Population Studies and Disparities Research (PSDR) Program focusing on Black-White disparities in cancer incidence, care, and outcomes. The studies in the review focus on individuals diagnosed with cancer from the Detroit Metropolitan area, but also includes individuals included in national databases. Using an organizational framework of three generations of studies on racial disparities, this review describes racial disparities by primary cancer site, disparities associated with the presence or absence of comorbid medical conditions, disparities in treatment, and disparities in physician-patient communication, all of which contribute to poorer outcomes for Black cancer patients. While socio-demographic and clinical differences account for some of the noted disparities, further work is needed to unravel the influence of systemic effects of racism against Black people, which is argued to be the major contributor to disparate outcomes between Black and White patients with cancer. This review highlights evidence-based strategies that have the potential to help mitigate disparities, improve care for vulnerable populations, and build an equitable healthcare system. Lessons learned can also inform a more equitable response to other health conditions and crises.

Rural-Urban Residence and Stroke Risk and Severity in Postmenopausal Women: The Women's Health Initiative.

Background: The impact of rural-urban residence on stroke risk and poor stroke outcomes among postmenopausal women is unknown. Methods: We used data from the Women's Health Initiative (WHI) (1993-2014; n = 155,186) to test the hypothesis that women who live in rural compared with urban areas have higher stroke risk and worse stroke outcomes than urban women. We used rural-urban commuting area codes to categorize geocoded participant addresses into urban, large rural, or small rural areas. Incident strokes during follow-up were adjudicated by neurologists who used standardized criteria for reviewing brain imaging reports and other medical records and determining stroke subtype. Stroke functional recovery was measured with the Glasgow Stroke Outcomes Scale ascertained from the hospital record. We used univariable and multivariable-adjusted Cox proportional hazards models as well as logistic regression models to test whether rural-urban residence predicted stroke risk and odds of poor stroke outcome. Results: Among the 155,186 women in our cohort, 2.3% (n = 3514) had an incident stroke. We observed a modest reduction in risk of incident stroke among women who lived in urban (adjusted hazard ratio [aHR]: 0.86, confidence interval [95% CI]: 0.71-1.05) and large rural areas (aHR: 0.79, 95% CI: 0.60-1.04) compared with women who lived in small rural areas. In contrast, women who lived in urban compared with large rural areas had a similarly modest increased risk of stroke (aHR: 1.09, 95% CI: 0.89-1.32). Women who lived in urban compared with large rural areas were more likely to have poor stroke outcome (odds ratio [OR]: 1.41, 95% CI: 1.06-1.88), but the association was attenuated after adjustment for covariates (adjusted OR [aOR]: 1.27, 0.93-1.74). Conclusions: Future studies should confirm and examine the potential pathways of the reported associations among postmenopausal women.

Rural-Urban Residence and Stage at Breast Cancer Diagnosis Among Postmenopausal Women: The Women's Health Initiative.

BACKGROUND: Although social exposures have complex and dynamic relationships and interactions, the existing literature on the impact of rural-urban residence on stage at breast cancer diagnosis does not examine heterogeneity of effect. We examined the joint effect of social support, social relationship strain, and rural-urban residence on stage at breast cancer diagnosis. METHODS: Using data from the Women's Health Initiative (WHI) (n = 161,808), we describe the distribution of social, behavioral, and clinical factors by rural-urban residence among postmenopausal women with incident breast cancer (n = 7,120). We used rural-urban commuting area (RUCA) codes to categorize baseline residential addresses as urban, large rural city/town, or small rural town, and the surveillance, epidemiology, and end results staging system to categorize breast cancer stage at diagnosis (dichotomized as early or late). We then used univariable and multivariable logistic regression to estimate odds ratios (ORs) and associated 95% confidence intervals (95% CI) for the relationship between rural-urban residence and stage at breast cancer diagnosis. We included separate interaction terms between rural-urban residence and social strain and social support to test for statistical interaction. RESULTS: Of the social, behavioral, and clinical factors we examined, only younger age at WHI enrollment screening was significantly associated with late stage at breast cancer diagnosis (p = 0.003). Contrary to our hypothesis, rural-urban residence was not significantly associated with stage at breast cancer diagnosis among postmenopausal women ([adjusted OR, 95% CI] for urban compared with small town: 1.08 [0.76-1.53]; large town compared with small town: 1.16 [0.74-1.84]; and urban compared with large town: 0.93 [0.68-1.26]).The associations did not vary by social support or social strain (p for interaction between RUCA and social strain and social support, respectively: 0.99 and 0.17). CONCLUSIONS: Future studies should examine other potential effect modifiers to identify novel factors predictive or protective for late stage at breast cancer diagnosis associated with rural-urban residence.

Brief report: Neighborhood disadvantage and hair cortisol among older urban African Americans.

Previous studies have shown that living in poor neighborhoods is associated with increased morbidity and mortality. However, researchers are now investigating the biological pathways responsible for the deleterious effects of neighborhood disadvantage on health. This study investigated whether neighborhood disadvantage (i.e., a measure of relative neighborhood quality derived by combining social and built environmental conditions) was associated with hair cortisol-a retrospective indicator of long-term hypothalamic pituitary adrenal (HPA) axis activation-and whether this link would be mediated by self-reported neighborhood satisfaction. Forty-nine older African Americans were recruited from thirty-nine Detroit census tracts across five strata of census tract adversity. Participants were interviewed face-to-face to collect psychosocial measures. Each provided a hair sample for analysis of cortisol. Multiple regression analyses revealed that higher neighborhood disadvantage was associated with higher levels of hair cortisol levels and that neighborhood satisfaction partially explained this association. These results are the first to our knowledge to demonstrate a direct link between neighborhood disadvantage and hair cortisol in a sample of older adults and to show that self-reported neighborhood satisfaction may be a psychological intermediary of this association.

Usefulness of a home affluence scale administered to urban adolescents with asthma to estimate the family's socioeconomic status.

PURPOSE: Measurement of socioeconomic status (SES) is traditionally based on education, income, and occupation. This information may not be readily available from adolescents participating in research. METHODS: Using data from school-based randomized trial of an asthma intervention targeting urban adolescents, we compared percent poverty in zip code of residence (% poverty), median housing value, and parental income and education, to teen responses on the Home Affluence Scale for Children (HASC), which included home, car, and computer ownership for the family and eligibility for free school lunch. The association of HASC with measures of asthma control was also assessed. RESULTS: Of 422 adolescents, 390 (92%) responded to HASC items (mean HASC = 2.5). HASC was associated with mother's education and household income (both P < .001), and significantly correlated with % poverty (P < .0001) and median home value (P = .003). The association of HASC <2.0 to indicators of uncontrolled asthma was in the direction hypothesized, especially for nighttime symptoms, odds ratio (95% confidence interval) = 1.59 (0.95-2.66) and restricted activity, odds ratio = 1.87 (1.12-3.12). CONCLUSIONS: HASC correlates well with more traditional measures of SES, and the risk estimates for HASC less than 2.0 and indicators of uncontrolled asthma were mostly in the hypothesized direction. Methods of obtaining SES indicators from youth are needed for research studies.

Racial differences in breast cancer survival in a large urban integrated health system.

BACKGROUND: African American (AA) women are known to have poorer breast cancer survival than whites, and the differences may be related to underlying disparities in their clinical presentation or access to care. This study evaluated the relationship between demographic, treatment, and socioeconomic factors and breast cancer survival among women in southeast Michigan. METHODS: The population included 2387 women (34% AA) with American Joint Committee on Cancer stage I to III breast cancer who were treated at the Henry Ford Health System (HFHS) from 1996 through 2005. Linked data sets from the HFHS, the Metropolitan Detroit Cancer Surveillance System, and the US Census Bureau were used to obtain demographic and clinical information. Comorbidities were classified with the modified Charlson comorbidity index (CCI). Economic deprivation was categorized with a census tract-based deprivation index (DI), which was stratified into 5 quintiles of increasing socioeconomic disadvantage. RESULTS: Compared with whites, AA women were significantly more likely to have larger, hormone receptor-negative tumors and more comorbidities and to reside in an economically deprived area. In an unadjusted analysis, AAs had a significantly higher risk of death (hazard ratio [HR], 1.36; 95% confidence interval [CI], 1.16-1.59); however, after adjustments for clinical (age, stage, hormone receptor, and CCI) and societal factors (DI), the effect of race was not significant (HR, 1.13 [95% CI, 0.96-1.34] , and HR, 0.97 [0.80-1.19] respectively). CONCLUSIONS: Racial differences in breast cancer survival can be explained by clinical and socioeconomic factors. Nonetheless, AA women with breast cancer remain disproportionately affected by unfavorable tumor characteristics and economic deprivation, which likely contribute to their increased overall mortality.

Functional limitations and nativity status among older Arab, Asian, black, Hispanic, and white Americans.

To examine the association between nativity status (foreign and US-born) by race/ethnicity (Arab, Asian, black, Hispanic, white) on having a functional limitation. We used American Community Survey data (2001-2007; n = 1,964,777; 65+ years) and estimated odds ratios (95% confidence intervals). In the crude model, foreign-born Blacks and Arabs were more likely, while Asians and Hispanics were less likely to report having a functional limitation compared to white. In the fully adjusted model, Blacks, Hispanics, and Asians were less likely, while Arabs were more likely to report having a functional limitation. In the crude model, US-born Blacks and Hispanics were more likely, while Asians and Arabs were less likely to report having a functional limitation compared to whites. Policies and programs tailored to foreign-born Arab Americans may help prevent or delay the onset of disability, especially when initiated shortly after their arrival to the US.

Geospatial relationships of air pollution and acute asthma events across the Detroit-Windsor international border: study design and preliminary results.

The Geospatial Determinants of Health Outcomes Consortium (GeoDHOC) study investigated ambient air quality across the international border between Detroit, Michigan, USA and Windsor, Ontario, Canada and its association with acute asthma events in 5- to 89-year-old residents of these cities. NO2, SO2, and volatile organic compounds (VOCs) were measured at 100 sites, and particulate matter (PM) and polycyclic aromatic hydrocarbons (PAHs) at 50 sites during two 2-week sampling periods in 2008 and 2009. Acute asthma event rates across neighborhoods in each city were calculated using emergency room visits and hospitalizations and standardized to the overall age and gender distribution of the population in the two cities combined. Results demonstrate that intra-urban air quality variations are related to adverse respiratory events in both cities. Annual 2008 asthma rates exhibited statistically significant positive correlations with total VOCs and total benzene, toluene, ethylbenzene and xylene (BTEX) at 5-digit zip code scale spatial resolution in Detroit. In Windsor, NO2, VOCs, and PM10 concentrations correlated positively with 2008 asthma rates at a similar 3-digit postal forward sortation area scale. The study is limited by its coarse temporal resolution (comparing relatively short term air quality measurements to annual asthma health data) and interpretation of findings is complicated by contrasts in population demographics and health-care delivery systems in Detroit and Windsor.

Racial differences in the use of adjuvant chemotherapy for breast cancer in a large urban integrated health system.

Background. Racial differences in breast cancer survival may be in part due to variation in patterns of care. To better understand factors influencing survival disparities, we evaluated patterns of receipt of adjuvant chemotherapy among 2,234 women with invasive, nonmetastatic breast cancer treated at the Henry Ford Health System (HFHS) from 1996 through 2005. Methods. Sociodemographic and clinical information were obtained from linked datasets from the HFHS, Metropolitan Detroit Cancer Surveillance Systems, and U.S. Census. Comorbidity was measured using the Charlson comorbidity index (CCI), and economic deprivation was categorized using a neighborhood deprivation index. Results. African American (AA) women were more likely than whites to have advanced tumors with more aggressive clinical features, to have more comorbidity and to be socioeconomically deprived. While in the unadjusted model, AAs were more likely to receive chemotherapy (odds ratio (OR) 1.22, 95% confidence interval (CI) 1.02-1.46) and to have a delay in receipt of chemotherapy beyond 60 days (OR 1.68, 95% CI, 1.26-1.48), after multivariable adjustment there were no racial differences in receipt (odds ratio (OR) 1.02, 95% confidence interval (CI) 0.73-1.43), or timing of chemotherapy (OR 1.18, 95 CI, 0.8-1.74). Conclusions. Societal factors and not race appear to have an impact on treatment delay among African American women with early breast cancer.

Persistent socioeconomic inequalities in cancer survival in the United States: 1973-2007 surveillance, epidemiology and end results (SEER) data for breast cancer and non-Hodgkin's lymphoma.

PURPOSE: Census tract variables have not been widely available for SEER-wide data due to several technical reasons; thus, prior studies have been conducted on a specific-community basis only or used county-level data. This study is the first to evaluate long-term chronological trends in cancer survival by selected socioeconomic variables of census tract level based on multiple SEER registry data. METHODS: 177,128 breast cancer and 45,615 non-Hodgkin's lymphoma (NHL) cases diagnosed from 1973-2007 and followed through 2009 from 4 SEER registries (Detroit, Hawaii, Utah and Seattle-Puget Sound), were linked to decennial census tract data (1970-2000). Five-year relative survival was calculated using the lifetable method according to census tract poverty levels and by year of diagnosis. The Cox proportional hazard model was used to estimate hazard ratios (HR) for death in 5 years from diagnosis, adjusted for selected covariates and SEER historical stage in the limited models only. RESULTS: Although the 5-year relative survival from both cancers improved similarly across poverty levels as percent per year, absolute increase per year was greater for lower poverty neighborhoods. This trend was most consistently observed for distant stage of cancer. The multivariable HR were significantly higher in the highest poverty group (greater than 20%), 1.41 and 1.33, for breast cancer and NHL respectively, than the lowest (greater than or equal to 5%). Additional adjustment for stage at diagnosis reduced the HR in the highest poverty level in breast cancer patients to 1.30, but had minimal effect on NHL. Socioeconomic disparities in overall survival were more evident in neighborhoods with higher proportions of racial minorities and in middle-aged patients than younger or older patients. CONCLUSIONS: Relative survival for both types of cancer improved over last 35-year period across poverty levels, but absolute differences increased. More studies are needed to develop innovative community-level interventions.

Mortality rates among Arab Americans in Michigan.

The objectives of this study were to: (1) calculate age-specific and age-adjusted cause-specific mortality rates for Arab Americans; and (2) compare these rates with those for blacks and whites. Mortality rates were estimated using Michigan death certificate data, an Arab surname and first name list, and 2000 U.S. Census data. Age-specific rates, age-adjusted all-cause and cause-specific rates were calculated. Arab Americans (75+) had higher mortality rates than whites and blacks. Among men, all-cause and cause-specific mortality rates for Arab Americans were in the range of whites and blacks. However, Arab American men had lower mortality rates from cancer and chronic lower respiratory disease compared to both whites and blacks. Among women, Arab Americans had lower mortality rates from heart disease, cancer, stroke, and diabetes than whites and blacks. Arab Americans are growing in number. Future study should focus on designing rigorous separate analyses for this population.

Medical barriers to mammography screening of African American women in a high cancer mortality area: implications for cancer educators and health providers.

African American women have a higher breast cancer mortality rate than whites even when cancer subtype is considered, are more likely to be diagnosed at a later stage, and are less likely to have mammography screening. Structural barriers limit screening but may be less important than clinical care and personal barriers among minority and lower income women. A random sample of 178 African American females aged >40 years from a high cancer risk area was surveyed to associate mammography screening with clinical, structural, and personal barriers. Clinical barriers including patient education and communication were significantly associated with lack of screening in previous 2 years. Personal barriers (lack of trust and knowledge) and structural barriers (lack of insurance, facilities, and providers) also reduced screening. Results reveal that medical practitioners should be more pro-active in reducing clinical barriers to mammography screening among lower income African American women. Improved patient physician communication, education about breast cancer to build knowledge and reduce fears, referral for mammography, and building trust are indicated.

Incorporating Geographic Information Systems (GIS) into program evaluation: lessons from a rural medicine initiative.

PURPOSE: To address the shortage of physicians practicing in rural areas of Michigan, the Wayne State University School of Medicine developed an integrated rural core curriculum to interest students in rural practice careers. Here we focus on the evaluation strategy used to determine the extent to which students in the new rural medicine interest group who self-identified as selecting a rural clerkship or externship did secure a clinical training experience in a rural setting. METHODS: Three measures of rurality were compared to determine whether students were placed in rural training settings: (1) the percentage of the county living in rural areas; (2) a county-level dichotomous measure of rural/nonrural; and (3) a dichotomous measure based on urban area boundaries within the county. Practice address and geographic data were integrated into geographic information systems software, which we used to map out rural characteristics of Michigan counties through a process called thematic mapping; this shows characteristic variation by color-shading geographic features. In addition, reference maps were created showing the boundaries of urban areas and metropolitan/micropolitan areas. Once these processes were completed, we overlaid the practice location on the contextual-level geographic features to produce a visual representation of the relationship between student placement and rural areas throughout the state. RESULTS: The outcome of student placement in rural practices varied by the definition of rural. We concluded that, although students were not placed in the most rural areas of Michigan, they received clerkship or externship training near rural areas or in semirural areas. CONCLUSION: This process evaluation had a direct impact on program management by highlighting gaps in preceptor recruitment. A greater effort is being made to recruit physicians for more rural areas of the state rather than urban and semirural areas. Geographic information systems mapping also defined levels of ruralism for students to help them make informed selections of training sties. This is especially important for students who are not sure about a rural experience and might be discouraged by placement in a remote rural area.

Race-ethnicity, crime, and other factors associated with adherence to inhaled corticosteroids.

BACKGROUND: Previous studies have shown differences in adherence to inhaled corticosteroids (ICSs) by race-ethnicity, yet little is known about factors that contribute to adherence within these groups. Environmental stressors, such as crime exposure, which has been associated with asthma morbidity, might also predict ICS adherence. OBJECTIVE: We sought to identify factors associated with ICS adherence among patients with asthma and among African American patients and white patients separately. METHODS: Study patients with asthma were aged 18 to 50 years and were enrolled in a large southeast Michigan health maintenance organization between January 1, 1999, and December 31, 2001. The primary outcome, ICS adherence, was calculated by linking prescription-fill data with dosage information. Predictor variables included age, sex, race-ethnicity, measures of socioeconomic status (SES), average ICS copay, existing comorbidities, and crime rate in area of residence. RESULTS: Adherence information was available for 176 patients. ICS adherence was lower among African American patients (n = 75) when compared with white patients (n = 94; 40% vs 58%, respectively; P = .002). Among white patients, adherence was significantly lower for women when compared with men. Among African American patients, age and residential crime rates were positively and negatively associated with ICS adherence, respectively. Area crime remained a predictor of adherence in African American patients, even after adjusting for multiple measures of SES. CONCLUSIONS: This study suggests that an environmental stressor, area crime, provides additional predictive insight into ICS-adherent behavior beyond typical SES factors. CLINICAL IMPLICATIONS: Better understanding of environmental factors that influence ICS adherence might aid in efforts to improve it.