Objective: Cancer mortality inequity among persons of African Ancestry is remarkable. Yet, Black inclusion in cancer biology research is sorely lacking and warrants urgent attention. Epidemiologic research linking African Ancestry and the African Diaspora to disease susceptibility and outcomes is critical for understanding the significant and troubling health disparities among Blacks. Therefore, in a cohort of diverse Blacks, this study examined differences in genetic ancestry informative markers (AIMs) in the DNA repair pathway and the cancer related biomarker 4-(Methylnitrosamino)-1-(3-pyridyl)-1-butanol (NNAL). Methods: Participants completed a questionnaire and provided bio-specimens. AIMs in or around DNA repair pathway genes were analyzed to assess differences in minor allele frequency (MAF) across the 3 ethnic subgroups. NNAL concentration in urine was measured among current smokers. Results: To date the cohort includes 852 participants, 88.3% being Black. Of the 752 Blacks, 51.3% were US-born, 27.8% were Caribbean-born, and 19.6% were Africa-born. Current and former smokers represented 14.9% and 10.0%, respectively. US-born Blacks were more likely to be smokers and poor metabolizers of NNAL. Two-way hierarchical clustering revealed MAF of AIMs differed across the 3 ethnic subgroups. Conclusion: Our findings are consistent with the emerging literature demonstrating Black heterogeneity underscoring African Ancestry genetic subgroup differences-specifically relevant to cancer. Further investigations, with data harmonization and sharing, are urgently needed to begin to map African Ancestry cancer biomarkers as well as race, and race by place\region comparative biomarkers to inform cancer prevention and treatment in the era of precision medicine.

Background: Black Americans have the greatest colorectal cancer (CRC) incidence and mortality rates in the United States. Suboptimal CRC screening rates may be mediated by health literacy, a lack of knowledge about the screening benefits and influenced by health services factors. We examined the relationship between CRC risk perceptions and socio-demographic characteristics, disease prevention activities, and personal/family history of CRC among Black men. Methods: The cross-sectional survey used a self-administered questionnaire and was conducted in five cities in the State of Florida between April 2008 and October 2009. Of the total 425 participants, 331 responses were valid for analysis. Descriptive statistics and logistic regression were performed. Results: Of 331 participants, higher CRC risk perceptions were exhibited among those aged ≥60 years (70.5%) and American nativity (59.1%). Multivariate analyses found men aged ≥60 had three times greater odds of having higher CRC risk perceptions compared to those ≤ 49 years. Obese participants had more than four times the odds and over-weight subjects had more than twice the odds as compared to healthy weight/underweight participants, to have higher CRC risk perceptions. Men with a personal/family history of CRC also had greater odds of having higher CRC risk perceptions (OR = 9.18; 95% CI = 2.02-41.79). Conclusion: Given early-onset of CRC in Black men, community educational programs tailored to Black men are needed to improve CRC screening uptake. This information will inform culturally resonate health promotion interventions to elevate CRC risk perceptions and increase screening in Black men.

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Background: Cancer is the leading cause of death among Latinos. Compared to non- Hispanic Whites, Latinos are more likely to be diagnosed with advanced stages of disease and to experience poorer outcomes and quality of life after a cancer diagnosis. Latino women (Latinas) have among the highest cervical cancer incidence rates. Overall, the cervical cancer incidence rate among US Latinas is about 44% higher than among non-Hispanic Whites. Low rates of screening and poor adherence to recommended follow-up after an abnormal test are thought to contribute to the higher cervical cancer mortality rates among Latinas. The lack of timely cancer screening negates the benefits otherwise afforded by early detection of cancer. Limitations in the research contributes to our lack of understanding of the potential web of factors that likely influences cervical cancer screening in Latinas. Purpose: This study aimed to identify and describe potential modifiable factors in the participants that would explain the lack of cervical cancer screening utilization. Methods: In this exploratory study, we recruited Latinas in Monterey County who received primary care in a local community clinic from January 2014 to December 2018. We conducted 7 in-depth interviews to identify the stages of change, health behaviors, health beliefs, perceptions of cancer risk, and self-efficacy to complete recommended cancer screening. All interviews were conducted in Spanish and were audio-recorded. The transcripts were translated from Spanish to English for analysis. Preliminary Findings: The mean age of participants was 52.0 years (SD, 13.7; range, 29-63 years) and all were of Mexican origin. The predictors of cancer screening were identified through the analysis of the transcripts. The lack of income to see a doctor, lack of insurance, lack of knowledge about cancer prevention and risk, and the absence of primary care utilization in their native country, created barriers to cervical cancer screening. Healthy foodways, positive outlook on life, and attending Women, Infant, and Children (WIC) classes facilitated cancer screening use. Religion and cultural factors expressed as “male machismo”, as well as the use of home remedies, and having family support mediated cancer screening behaviors. Conclusion: This exploratory study informs the direction for future intervention research that ultimately can increase community knowledge of the benefits afforded by cancer early detection and timely treatment. Such interventions may result in an increase in cervical cancer screening rates in Latinas. Citation Format: Meng-Han Tsai, Daramola N. Cabral. Exploratory study of cervical cancer screening among Latinas in a remote agricultural community [abstract]. In: Proceedings of the AACR Virtual Conference: Thirteenth AACR Conference on the Science of Cancer Health Disparities in Racial/Ethnic Minorities and the Medically Underserved; 2020 Oct 2-4. Philadelphia (PA): AACR; Cancer Epidemiol Biomarkers Prev 2020;29(12 Suppl):Abstract nr PO-252.