Disparities In Overall Survival Research Articles

Splenectomy as a part of cytoreductive surgery in ovarian cancer: systematic review and meta-analysis

ObjectiveThe role of splenectomy on cytoreductive surgery in patients with ovarian cancer remains controversial. We conducted this meta-analysis to evaluate the safety and impact of survival outcome of splenectomy in...

Exploring the mystery of colon cancer from the perspective of molecular subtypes and treatment

The molecular categorization of colon cancer patients remains elusive. Gene set enrichment analysis (GSEA), which investigates the dysregulated genes among tumor and normal samples, has revealed the pivotal role of epithelial-to-mesenchymal transition (EMT) in colon cancer pathogenesis. In this study, we employed multi-clustering method for grouping data, resulting in the identification of two clusters characterized by varying prognostic outcomes. These two subgroups not only displayed disparities in overall survival (OS) but also manifested variations in clinical variables, genetic mutation, and gene expression profiles. Using the nearest template prediction (NTP) method, we were able to replicate the molecular classification effectively within the original dataset and validated it across multiple independent datasets, underscoring its robust repeatability. Furthermore, we constructed two prognostic signatures tailored to each of these subgroups. Our molecular classification, centered on EMT, hold promise in offering fresh insights into the therapy strategies and prognosis assessment for colon cancer.

Identification of N7-methylguanosine-related miRNAs as potential biomarkers for prognosis and drug response in breast cancer

ObjectivesThe impact of N7-methylguanosine (m7G) on tumor progression and the regulatory role of microRNAs (miRNAs) in immune function significantly influence breast cancer (BC) prognosis. Investigating the interplay between m7G modification and miRNAs provides novel insights for assessing prognostics and drug responses in BC. Materials and methodsRNA sequences (miRNA and mRNA profiles) and clinical data for BC were acquired from the Cancer Genome Atlas (TCGA) database. A miRNA signature associated with 15 m7G in this cohort was identified using Cox regression and LASSO. The risk score model was evaluated using Kaplan-Meier and time-dependent ROC analysis, categorizing patients into high-risk and low-risk groups. Functional enrichment analyses were conducted to explore potential pathways. The immune system, including scores, cell infiltration, function, and drug sensitivity, was examined and compared between high-risk and low-risk groups. A nomogram that combines risk scores and clinical factors was developed and validated. Single-sample gene set enrichment analysis (ssGSEA) was employed to explore m7G-related miRNA signatures and immune cell relationships in the tumor microenvironment. Additionally, drug susceptibility was compared between risk groups. ResultsFifteen m7G-related miRNAs were independently correlated with overall survival (OS) in BC patients. Time-dependent ROC analysis yielded area under the curve (AUC) values of 0.742, 0.726, and 0.712 for predicting 3-, 5-, and 10-year survival rates, respectively. The Kaplan-Meier analysis revealed a significant disparity in OS between the high-risk and low-risk groups (p = 1.3e-6). Multiple regression identified the risk score as a significant independent prognostic factor. An excellent calibration nomogram with a C-index of 0.785 (95 % CI: 0.728–0.843) was constructed. In immune analysis, low-risk patients exhibited heightened immune function and increased responsiveness to immunotherapy and chemotherapy compared to high-risk patients. ConclusionThis study systematically analyzed m7G-related miRNAs and revealed their regulatory mechanisms concerning the tumor microenvironment (TME), pathology, and the prognosis of BC patient. Based on these miRNAs, a prognostic model and nomogram were developed for BC patients, facilitating prognostic assessments. These findings can also assist in predicting treatment responses and guiding medication selection.

Prognostic impact of histological discordance between transurethral resection and radical cystectomy.

To analyse the impact of histological discordance of subtypes (subtypes or divergent differentiation [DD]) in specimens from transurethral resection (TUR) and radical cystectomy (RC) on the outcome of the patients with bladder cancer receiving RC. We analysed data for 2570 patients from a Japanese nationwide cohort with bladder cancer treated with RC between January 2013 and December 2019 at 36 institutions. The non-urinary tract recurrence-free survival (NUTR-FS) and overall survival (OS) stratified by TUR or RC specimen histology were determined. We also elucidated the predictive factors for OS in patients with subtype/DD bladder cancer. At median follow-up of 36.9 months, 835 (32.4%) patients had NUTR, and 691 (26.9%) died. No statistically significant disparities in OS or NUTR-FS were observed when TUR specimens were classified as pure-urothelial carcinoma (UC), subtypes, DD, or non-UC. Among 2449 patients diagnosed with pure-UC or subtype/DD in their TUR specimens, there was discordance between the pathological diagnosis in TUR and RC specimens. Histological subtypes in RC specimens had a significant prognostic impact. When we focused on 345 patients with subtype/DD in TUR specimens, a multivariate Cox regression analysis identified pre-RC neutrophil-lymphocyte ratio and pathological stage as independent prognostic factors for OS (P = 0.016 and P = 0.001, respectively). The presence of sarcomatoid subtype in TUR specimens and lymphovascular invasion in RC specimens had a marginal effect (P = 0.069 and P = 0.056, respectively). This study demonstrated that the presence of subtype/DD in RC specimens but not in TUR specimens indicated a poor prognosis. In patients with subtype/DD in TUR specimens, pre-RC neutrophil-lymphocyte ratio and pathological stage were independent prognostic factors for OS.

Understanding causes of racial/ethnic survival disparity in 47,178 patients with colorectal cancer: A quantitative evaluation of molecular, socioeconomic, and clinical covariates.

20 Background: A disparity in overall survival (OS) of colorectal cancer (CRC) patients based on self-reported race has been observed. Separately, differing frequencies of driver gene mutations among racial groups have been observed. The contribution of these molecular differences to disparity in outcomes is not well understood. We conducted a systematic investigation of molecular, socioeconomic (SES) and clinical covariates to quantitate the degree to which each influences the OS disparity. Methods: The Foundry software platform was used to query electronic health records to identify CRC patients and extract clinical and molecular data. The relative contribution of each variable to OS disparity was determined using mediation analysis consisting of sequential multivariate Cox regression models. Results: 47,178 patients with CRC diagnosed between 1973 and 2023 with self-reported race were identified. Relative to Non-Hispanic white (NHW), African American (AA) had worse OS (HR=1.16, P= 1.5E-6), while Asians and Hispanics had better OS (HR=0.66, P=4.2E-13 and HR=0.86, P=3.4E-6, respectively). The magnitude of disparity between AA and NHW was greater in metastatic disease (HR 1.2, P=1.7E-4). Among 7,628 patients with clinical molecular testing, five genes differed significantly in mutation frequencies; APC (54% NHW, 62% AA, 57% Hispanics, 46% Asian, FDR= 0.01), KRAS (45%, 58%, 50%, 44%, FDR=8.4E-9), PIK3CA (17%, 23%, 17%, 12%, FDR=0.006) were higher in AA, while BRAF (8%, 3%, 4%, 7%, FDR=2.4E-8), KIT (4%, 1%, 2%, 3%, FDR=0.013) were higher in NHW. In multivariate analysis mutations of BRAF (HR= 1.9, P=1.2E-8), KRAS (HR= 1.39, P=1.7E-7), and APC (HR= 0.81, P= 5E-4) were significantly associated with OS as was national area deprivation index (HR= 1.07, P=0.004), marital status (HR= 1.16, P=0.03), performance status (HR= 1.42, P= 5.3E-29), disease stage (HR= 1.502, P=4.4E-26), right sided tumors (HR= 1.23, P=0.003), tumor differentiation (HR= 1.22, P=0.004) and MSI-high (HR= 0.37, P=1.8E-7). Mediation analysis identified neighborhood SES as the greatest contributor to disparity (38%), followed by primary tumor side (10%), and molecular characteristics (MSI-status, KRAS and BRAF mutations, 10%). After including all covariates, 39% of disparity remained unaccounted. Conclusions: Systematic evaluation of a large cohort from a single institution confirmed substantial racial disparity in survival and frequencies of driver mutations. SES factors have the largest contribution but account only for forty percent of the disparity, with tumor molecular features also contributing. Molecular characteristics should be incorporated in multicentric studies of racial survival disparity. Future clinical studies should ideally account for genetic ancestry and molecular features when evaluating chemotherapy outcomes.

Disparities in overall survival by varying duration of disability in activities of daily living in older people: A population-based cohort from Chinese Longitudinal Healthy Longevity Survey (CLHLS).

To investigate the association between duration of disability in activity of daily living (ADL) and overall survival in older individuals. A prospective cohort study. Community-based data from Chinese Longitudinal Healthy Longevity Survey. In total, 13,560 participants without ADL disability and 2772 participants with ADL disability at baseline were included. ADL disability was assessed using Katz index scale, which included six essential ADLs: dressing, bathing, transferring, toileting, continence, and eating. Dependence of each item was scored on a scale of 1, the maximum total score was 6. At baseline, duration of ADL disability was defined as the maximum duration among the six items. The study outcome was overall survival. Accelerated failure time models were constructed to investigate the association between duration of ADL disability and overall survival. Subgroup analyses by sex, age, and multimorbidites, as well as sensitive analyses were conducted. During 81,868.7 person-years follow-up, 11,092 deaths were recorded. Overall, ADL disability was associated with lower overall survival compared to non-ADL disability. With duration of ADL disability extending, the overall survival strikingly dropped in the first 12 months, reaching its lowest point with adjusted time ratio (TR) at 0.66 (95%CI: 0.61-0.72, p<0.001), then moderately grew until the 60th month, finally stayed constant thereafter. Participants with ADL scores of 1-3 had higher survival compared to those with scores of 4-6, and both groups followed a similar trend of varied survival to the whole cohort. Moreover, subgroup analyses and sensitivity analyses showed the robustness of these findings. Our findings first address a golden time window for the older individuals with ADL disability. More attention should be given to them, especially in the first 12 months since diagnosis, to reduce mortality and extend the lifespan.

The Impact of Neighborhood Deprivation on the Survival Rates of Patients with Cancer in Korea.

The objective of this study is to investigate the correlation between the neighborhood deprivation index and survival rates of cancer patients in Korea. In this study, 5-year age-standardized survival rates of patients with cancer were determined using the National Cancer Cohort from 2014 to 2018 in Korea. The primary cancer sites were the stomach, colorectum, liver, lung, breast, cervix, prostate, and thyroid. Disparities were measured, and their impact on the overall survival rates was assessed using the Korean version of the Neighborhood Deprivation Index. Pearson's correlation coefficient was calculated to determine the strength of the correlation. The study cohort comprised 726,665 patients with cancer, of whom 50.7% were male. The predominant primary cancer sites were the stomach (n = 138,462), colorectum (n = 125,156), and thyroid gland (n = 120,886). Urban residents showed better survival outcomes than those situated in rural areas. The most deprived quartile had the lowest survival rate, while the least deprived quartile had the highest (p < 0.001). Most cancer types revealed significant correlations between neighborhood deprivation and 5-year age-standardized overall survival, with lung cancer showing the most substantial negative correlation (r = -0.510), followed by prostate cancer (r = -0.438). However, thyroid cancer showed only a marginal correlation (p = 0.069). The results of this study suggested that neighborhood deprivation is closely linked to disparities in overall survival across various types of cancer. A substantial negative correlation between the neighborhood deprivation index and all-cause mortality for lung and prostate cancer, as compared to breast and cervical cancers covered by the National Cancer Screening Program, may reinforce the need to address healthcare access and improve the early detection of cancer in socioeconomically deprived neighborhoods.

Differences in Survival between Black and White Patients with Head and Neck Squamous Cell Carcinoma: Comparison of Data from the DOD Central Cancer Registry and SEER.

Barriers to health care access may contribute to the poorer survival of Black patients with head and neck squamous cell carcinoma (HNSCC) than their White counterparts in the U.S. general population. The Department of Defense's (DOD) Military Health System (MHS) provides universal health care access to all beneficiaries with various racial backgrounds. We compared overall survival of patients with HNSCC by race in the MHS and the general population, respectively, to assess whether there were differences in racial disparity between the two populations. The MHS patients were identified from the DOD's Central Cancer Registry (CCR) and the patients from the U.S. general population were identified from the NCI's Surveillance, Epidemiology and End Results (SEER) program. For each cohort, a retrospective study was conducted comparing survival by race. Black and White patients in the CCR cohort had similar survival in multivariable Cox regression models with a HR of 1.04 and 95% confidence interval (95% CI) of 0.81 to 1.33 after adjustment for the potential confounders. In contrast, Black patients in the SEER cohort exhibited significantly worse survival than White patients with an adjusted HR of 1.47 (95% CI = 1.43-1.51). These results remained similar in the subgroup analyses for oropharyngeal and non-oropharyngeal sites, respectively. There was no racial difference in survival among patients with HNSCC in the MHS system, while Black patients had significantly poorer survival than White patients in the general population. Equal access to health care could reduce racial disparity in overall survival among patients with HNSCC.

Integrated analysis identities Rho GTPases related molecular map in patients with gastric carcinoma

The intricate involvement of Rho GTPases in a multitude of human malignancies and their diverse array of biological functions has garnered substantial attention within the scientific community. However, their expression pattern and potential role in gastric cancer (GC) remain unclear. In this study, we successfully identified two distinct subtypes associated with Rho GTPase-related gene (RGG) through consensus clustering analysis, which exhibited significant disparities in overall survival and the tumor microenvironment. Subsequently, an extensively validated risk model termed RGGscore was meticulously constructed to prognosticate the outcomes of GC patients. This model was further assessed and validated using an external cohort. Notably, the high RGGscore group was indicative of a poorer prognosis. Univariate and multivariate Cox regression analyses unveiled the RGGscore as an autonomous prognostic indicator for GC patients. Subsequent external validation, utilizing two cohorts of patients who underwent immunotherapy, demonstrated a significant correlation between a low RGGscore and improved response to immunotherapy. Additionally, the expression levels of three genes associated with RGGscore were examined using qRT-PCR. Taken together, a pioneering RGGscore model has been successfully established, showcasing its potential efficacy in offering valuable therapeutic guidance for GC.

Abstract B116: Real world treatment patterns and treatment outcomes of neuroendocrine tumors: A single institution study

Abstract Introduction: Neuroendocrine tumors (NET) arising from the gastrointestinal tract are rare heterogenous neoplasms that differ in several characteristics including biological behavior, degree of differentiation as well as prognosis. Given the rarity of the condition, much appears to be learned about clinical characteristics and response to therapy for patients with GI neuroendocrine tumors. African American patients are typically associated with poorer outcomes or survival in a variety of tumors but not as well described in neuroendocrine tumors. Our study aimed to study if racial disparities exist in outcomes for patients with NET’s. Methods: Patients who had a diagnosis of neuroendocrine tumor of any grade, and primary location between 2014 to 2022 were identified from Henry Ford Health (HFH) Cancer Registry. The patients’ demographic (age at diagnosis, sex, and self-reported race and ethnicity) were collected from the HFH Electronic Health Records databases in this retrospective data analysis. Race was determined and stratified as non-Hispanic Caucasian (CA), African American (AA), others, and unknown. Log-rank test was conducted to compare the survival curves between CA and AA groups. Cox proportional hazards model was applied with adjustments for age and sex (if applicable) while comparing racial disparities in overall survival. The CA vs. AA hazard ratio (HR) and p-values were calculated. Results: Of the 736 patients, 56.4% (415) were CA, 32.6% (240) were AA, 6.5% (48) were others with the rest 4.5% (33) being unknown. 57.6% of the patients were over the age of 60 and the distribution of males and females were about equivalent at 49.6% and 50.4% respectively. The mean Charlson co-morbidity index was 2.47 in CA, and 2.08 in AA (p=0.095). The average survival in months from time of diagnosis was 76.93 months in CA and 84.6 months in AA (p=0.05). There was no statistical significance when adjusted for age and sex (HR = 1.18, p=0.33). Black females had an average survival of 85.76 months compared to 83 months in white females (p=0.6). Black males did better with an average survival of 82 months to compared to white males at 70.48 months (p=0.04). When age was adjusted, there was no statistical significance between CA and AA (HR = 1.38, p = 0.18). Both white males and females had more patients diagnosed as metastatic at one year prior to diagnosis n= 28 and n=20 respectively compared to black males (n=10) and females (n=9). However, black females with metastatic disease did worse than white females with average survival of 15.22 months compared to 24.24 months (p=0.8). Conclusion: In our retrospective analysis, white patients seemed to have a worse prognosis in terms of overall survival (OS) compared to black patients. However, when adjusted for age and sex, it did not appear to be statistically significant. Black females did have an overall survival worse than white females. Larger studies across multiple institutions may help us understand if racial disparities do exist and develop methods to help eliminate them. Citation Format: Radhika N. Gutta, Wang-Ting Su, Ruicong She, Gazala Khan. Real world treatment patterns and treatment outcomes of neuroendocrine tumors: A single institution study [abstract]. In: Proceedings of the 16th AACR Conference on the Science of Cancer Health Disparities in Racial/Ethnic Minorities and the Medically Underserved; 2023 Sep 29-Oct 2;Orlando, FL. Philadelphia (PA): AACR; Cancer Epidemiol Biomarkers Prev 2023;32(12 Suppl):Abstract nr B116.

Social vulnerability and racial disparities in overall survival among endometrial cancer patients (061)

Social vulnerability and racial disparities in overall survival among endometrial cancer patients (061)

Comprehensive study of clinical features, prognostic factors, and survival in patients with pancreatic solid pseudopapillary neoplasms based on the 2019 WHO classification.

Pancreatic solid pseudopapillary neoplasms (pSPNs) are a rare tumor type with a limited understanding of their clinical characteristics and survival outcomes. We aimed to investigate potential prognostic factors among the existing clinical features in patients diagnosed with pSPN. For this study, we utilized data from the Surveillance Epidemiology and End Results (SEER) database, specifically selecting patients with a histology type of pSPN from the years 2000 to 2019. Subsequently, we conducted both univariate and multivariate Cox regression analyses in a systematic manner to identify potential prognostic factors associated with overall survival (OS) and cancer-specific survival (CSS) in the selected group of patients. To assess the disparity in OS and CSS among different clinical features and treatments, Kaplan-Meier curves were generated. Furthermore, utilizing the results obtained from the multivariate analysis, we developed a nomogram predictive model to effectively forecast the prognosis of patients diagnosed with pSPN. Calibration plots were presented to demonstrate the predictive accuracy and reliability of the nomogram predictive model. The study comprised a total of 433 participants, with 85.7% of the patients diagnosed with pSPN being female and the remaining 14.3% being male. The Kaplan-Meier curves indicated that patients with pSPN who underwent primary tumor resection (PTR) and those who were younger than 70years old had significantly improved OS and CSS compared to those who did not undergo PTR or were aged 70years or older, respectively (P < 0.001). Male patients diagnosed with pSPN exhibited poor OS compared to female pSPN patients (P = 0.015). The multivariate Cox regression analysis indicated that age (OS: HR = 1.055, 95% CI = 1.027-1.084, P < 0.001. CSS: HR = 1.054, 95% CI = 1.019-1.091, P = 0.002) and PTR (OS: HR = 6.074, 95% CI = 1.922-19.194, P = 0.002. CSS: HR = 4.912, 95% CI = 1.188-20.312, P = 0.028) were independent prognostic factors for both OS and CSS. Moreover, tumor size (≥ 5 vs < 5cm CSS: HR = 4.788, 95% CI = 1.012-22.661, P = 0.048) was an independent prognostic factor for CSS. The independent prognostic factors identified through the multivariate Cox regression analysis were utilized to construct a nomogram model for predicting both OS and CSS in patients with pSPN. The accuracy of the nomogram model was visually testified by the calibration plot with acceptable predictive performance. Although the majority of patients diagnosed with pSPN are females, it was observed that male patients tend to have poorer OS compared to their female counterparts. The independent prognostic factors identified in the study were age and PTR, which were associated with both OS and CSS. Tumor size was an independent prognostic factor for CSS. Patients who underwent PTR exhibited improved OS and CSS outcomes. The developed nomogram and corresponding reference table provided promising prognostic predictions for pSPN outcoms, serving as a valuable resource for clinicians and patients alike.

Variation in KRAS/NRAS/BRAF-Mutation Status by Age, Sex, and Race/Ethnicity Among a Large Cohort of Patients with Metastatic Colorectal Cancer (mCRC).

Racial/ethnic disparities in metastatic colorectal cancer (mCRC) survival are well documented as is the impact that tumor mutation of KRAS and BRAF has on prognosis. It has been suggested that frequency differences of KRAS- and BRAF-mutated tumors may partially explain this disparity. Demographic differences in mutation frequency are not well established nor whether mutation and microsatellite instability (MSI) differentially impact survival among groups. Using data for 11,117 patients diagnosed with de-novo mCRC from an electronic health record-derived database we estimated adjusted odds ratios (aOR) to characterize the association between demographics and MSI and KRAS/NRAS/BRAF-mutation status. Stratified Cox models were used to identify differences in overall survival (OS), adjusting for treatment and demographics. Being female, compared to male, (aORKRAS:1.33 (1.23-1.44); aORBRAF:1.84 (1.56-2.16)), and non-Hispanic Black race (NHB), compared to non-Hispanic White (NHW) (aORKRAS:1.62 (1.42-1.85); aORBRAF: 0.55 (0.38-0.77)) were associated with KRAS- or BRAF-mutant tumors. MSI prevalence was similar across race/ethnicity but higher in women. BRAF-mutant tumors were associated with poorer prognosis overall, especially among non-white patients. Among patients who had KRAS/NRAS/BRAF-WT tumors we observed no difference in OS by race or MSI. Among patients with KRAS-mutant tumors, Hispanic patients had more favorable prognosis adjusted hazards ratio (aHR) = 0.76 (0.65-0.89)) than their NHW counterparts. Among those with BRAF-mutant tumors, NHB patients had poorer prognosis than NHW patients (aHR:1.78 (1.08-2.93)). MSI and frequency of KRAS and BRAF mutations differed by demographics. Racial/ethnic disparities in OS differed by mutation. Future studies should explore biological and/or social determinants underlying these differences.

Association between pre-diagnosis geriatric syndromes and overall survival in older adults with cancer (the INCAPAC study)

IntroductionSeveral population-based studies have reported disparities in overall survival (OS) among older patients with cancer. However, geriatric syndromes, known to be associated with OS in the geriatric population, were rarely studied. Thus, our aim was to identify the determinants of OS among French older adults with cancer, including geriatric syndromes before cancer diagnosis. Materials and MethodsUsing cancer registries, we identified older subjects (≥65 years) with cancer in three French prospective cohort studies on aging from the Gironde department. Survival time was calculated from the date of diagnosis to the date of all-cause death or to the date of last follow-up, whichever came first. Demographic and socioeconomic characteristics, smoking status, self-rated health, cancer-related factors (stage at diagnosis, treatment), as well as geriatric syndromes (polypharmacy, activity limitation, depressive symptomatology, and cognitive impairment or dementia) were studied. Analyses were performed using Cox proportional hazard models for the whole population, then by age group (65–84 and 85+). ResultsAmong the 607 subjects included in the study, the median age at cancer diagnosis was 84 years. Smoking habits, activity limitations, cognitive impairment or dementia, advanced cancer stage and absence of treatment were significantly associated with lower OS in the analysis including the whole population. Women presented higher OS. Factors associated with OS differed by age group. Polypharmacy was inversely associated with OS in older adults aged 65–84 and 85 + . DiscussionOur findings support that geriatric assessment is needed to identify patients at higher risk of death and that an evaluation of activity limitation in older adults is essential. Improving early detection could enable interventions to address factors (activity limitations, cognitive impairment) associated with OS, potentially reducing disparities and lead to earlier palliative care.

The impact of novel therapies on disparities in survival outcomes for metastatic cancers.

e18635 Background: Real-world data have suggested that increases in overall survival (OS) for metastatic cancers over time have been driven by improvements in the groups of patients who already had the highest survival outcomes. To further investigate these identified trends, this research aimed to quantify how novel therapies for metastatic cancers impact disparities in OS outcomes. Methods: Novel therapies for metastatic breast (mBC), metastatic colorectal (mCRC), and metastatic non-small cell lung (mNSCLC) cancer, approved by the United States Food and Drug Administration (FDA) in the last 8 years based on data from phase III randomised controlled trials (RCTs), were identified. For each cancer type, 3 novel therapies were selected with inclusion based on the availability of published Kaplan-Meier data for OS, at least 100 patients in each arm of the corresponding RCT, and OS reaching less than 30% at the end of the RCT follow-up period. For each cancer type and for the novel therapies and comparator therapies separately, the published OS data were replicated from the Kaplan-Meier data and pooled using weights based on sample sizes to ensure each therapy contributed equally to the analysis. Parametric survival modelling was performed to address censoring. The disparity in OS was defined by the absolute difference between groups with the highest and lowest survival, with groups defined by stratifying OS in either 2 or 5 groups. The impact of the combined novel therapies was determined based on the change in OS disparity relative to the combined comparators. A probabilistic analysis was performed to quantify the impact of parameter uncertainty on the outcomes. Results: Novel therapies increased disparities in OS across the 3 cancers. For mBC, the disparities in OS increased by 5.4 (95%-confidence interval: 0.9; 9.9) months, which equates to a 23.0% increase from 24.2 to 29.6 months if OS was stratified in 2 groups, and by 13.9 (1.4; 26.6) months; 25.0% from 57.1 to 71.1 if OS was stratified in 5 groups. For mCRC, disparities increased by 2.8 (1.4; 4.2) months; 37.6% from 7.5 to 10.3 months and by 6.3 (2.9; 9.8) months; 38.9% from 16.5 to 22.8 months, for stratification based on 2 and 5 groups, respectively. For mNSCLC, disparities increased by 10.2 (3.3; 17.3) months; 33.6% from 31.0 to 41.3 months and by 19.5 (4.0; 35.5) months; 31.5% from 63.2 to 82.7 months, for stratification based on 2 and 5 groups, respectively. Conclusions: OS outcomes for recent FDA-approved drugs for metastatic cancers suggest that these novel therapies increase disparities in OS between the patient groups with the highest and lowest OS relative to their comparator therapies in RCTs. Although evidence in terms of these disparities is important, further research using (real-world) individual patient data is warranted to assess how, for example, socioeconomic variables affect the impact of therapies on health disparities among patient groups.

Association between social determinants of health and outcomes among young patients with prostate cancer.

e18500 Background: Influence of Social Determinants of Health (SDHs) on Outcomes among Young Patients with Prostate Cancer. SDHs significantly influence prostate cancer patients' incidence, presentation, and outcomes. However, how these factors affect outcomes in younger patients with prostate cancer has been understudied in the literature. Prostate cancer is the commonest cancer among men in the US, and studying these factors will further enhance efforts to develop appropriate public health strategies to combat the disease. Aim: To determine the influence of patients' race and SDHs on outcomes among young patients with prostate cancer. Methods: Utilizing data from the National Cancer Database (NCDB), we conducted a retrospective analysis of all patients with a primary diagnosis of prostate cancer from January 2004 to December 2018. The outcome measures were diagnosis to definitive treatment time (days), length of hospitalization (days), and overall survival. We determined the influence of patients’ race/ethnicity, insurance type, residence annual median income (median household income for each patient's area of residence), and residence education level (defined as the proportion of adults ≥25 years who did not complete high school in the patients' zip code) on the overall survival among young patients with prostate cancer. Results: There were 843,511 cases of prostate malignancy reported in the National Cancer Database between 2004 and 2018. About 6.3% of these patients were younger than 50 years (N=52,890). Among the younger patients, 74.0% were whites, and 21.3% were Blacks. These compare to the control of adults older than 50 years, with 84.3% whites and only 11.3% Blacks. On multivariate analysis, Black patients have a longer diagnosis to definitive treatment time and overall longer hospital stay but no racial disparity in overall survival. Significant predictors of overall survival among the young prostate cancer survivors were patients with private insurance and higher income quintiles (see table). Conclusions: Insurance and income rather than race/ethnicity or education level appear to constitute a significant predictor of survival among young prostate cancer patients in the United States.[Table: see text]

Investigating the impact of demographic disparities on clinical outcomes in cutaneous T-cell lymphoma (CTCL): A multicenter retrospective cohort analysis.

7573 Background: Black patients have been shown to have a higher incidence of cutaneous T-cell lymphomas (CTCL) and display unique clinicopathologic features at diagnosis, however, drivers of these disparities and the role of social determinants of health (SDoH) remain poorly understood. Methods: To further characterize the prognostic relevance of racial and demographic disparities in CTCL, we performed a retrospective review of 1,198 patients seen at 8 different academic treatment centers in the United States between 2000-2020. Clinical variables included demographics, disease characteristics, and survival. Race and ethnicity were stratified into 2 groups for this analysis: non-Hispanic Black (B) and Non-Black (NB). Distance to center was stratified into short, intermediate, or long commute ( &lt; 10, 10-50, &gt; 50 miles, respectively) based on home zip code. The primary endpoint was overall survival (OS). Univariate association and multivariable analyses were assessed using Cox proportional hazards models. Results: Among 1,198 total patients, 42.4% identified as B and 58.6% as NB. B patients presented younger, had a shorter commute, lower income, but no difference in insurance compared to NB patients. There was no difference in survival by race (Median OS 74 months (95% CI 65-84) compared to 65 (95% CI 58-75) for NB patients). Distance to center was strongly associated with survival and remained significant on multivariate analyses after controlling for age, race, and other SDoH. Longer commute was associated with worse OS compared to short commute for both B and NB counterparts (median 55 months [95% CI 49-66] vs. 79 [95% CI 69-90] and 75 [95% CI 63-86], respectively, p = 0.006). Conclusions: We characterized the impact of race and SDoH on overall survival (OS) in a diverse, multicenter cohort of patients with CTCL. We found that distance to cancer center was the most important factor contributing to disparities in OS in this study. This highlights the importance of improving access to care, particularly in rare and clinically heterogeneous diseases such as CTCL.

Abstract 1914: Pancreatic cancer and racial disparity in Hampton Roads

Abstract Background: Pancreatic cancer is one of the most lethal diseases, with a dismal five-year survival rate of 9% and a median post-diagnosis survival of 6 months. It is currently the third leading cause of cancer-related death in the United States. The dismal prognosis of patients diagnosed with pancreatic cancer points to our limited arsenal of effective anticancer therapies and screening tools. Pancreatic cancer disproportionately affects the Black and Jewish populations; nationally we see lower survival and later stage at diagnosis among the black population when compared to their white counterparts. Objectives: This study aims to measure racial disparity in overall survival, diagnosis, and treatment regimens of pancreatic cancer in Hampton Roads Virginia in comparison to the national average. We hope to highlight the similarities/differences of cancer disparity in the two major racial groups in our local Pancreatic Ductal Adenocarcinoma (PDAC) cohort. Methods: This retrospective study uses a cohort of 640 patients diagnosed with pancreatic cancer between 2008 and 2016 within the Sentara Healthcare and/or Virginia Oncology Associates (VOA) system in Hampton Roads. The cohort was stratified into two groups: 191 patients diagnosed with operable disease who underwent surgical resection, and 449 patients diagnosed with inoperable disease; and then further separated into a white and black populations. Survival was calculated from date of initial diagnosis to date of last follow-up or death from all-cause mortality. Clinical and pathological parameters (TNM classification) and standard treatment modalities were reviewed, validated, and compared using electronic medical records at Sentara EPIC and VOA iKnow Medicine. Results: Of the 191 pancreatic cancer patients, 45 underwent surgical resection only, 100 received surgery and adjuvant chemotherapy, and 46 received NACT and surgery. In the operable cohort, 41.5% of the PDAC patients are African American (AA) and 55.8% are Caucasians. Thus, pancreatic cancer incidence among black patients was over-represented in Hampton Roads Virginia that has a 31.3% AA population. Treatment provided and stage of diagnosis for pancreatic cancer are comparable in the two major race groups. The total length of survival of our black patients was not worse when compared to the white patients in both operable and inoperable cohorts, however white patients more frequently met the 5-year survival milestone. Conclusion: Our PDAC patients of the two race groups still have a lower 5-year survival as compared to that of the national average (SEER data). The underlying factors contributing to the dismal 5-year survival rate and higher incidence are likely multifactorial, possibly explained by unhealthy diet, genetic factors, mutant carriers, social economic status, insurance, and increased risk behaviors as compared to national averages. Citation Format: Zakary L. Kolkey. Pancreatic cancer and racial disparity in Hampton Roads [abstract]. In: Proceedings of the American Association for Cancer Research Annual Meeting 2023; Part 1 (Regular and Invited Abstracts); 2023 Apr 14-19; Orlando, FL. Philadelphia (PA): AACR; Cancer Res 2023;83(7_Suppl):Abstract nr 1914.

The influencing factors of renal response in newly diagnosed multiple myeloma patients with renal impairment

Objective: To investigate the causative factors of renal function in newly diagnosed multiple myeloma (MM) patients with renal inadequacy. Methods: 181 MM patients with renal impairment from August 2007 to October 2021 at Peking Union Medical College Hospital were recruited, whose baseline chronic kidney disease (CKD) stage was 3-5. Statistical analysis was performed based on laboratory tests, treatment regimens, hematological responses, and survival among various renal function efficacy groups. A logistic regression model was employed in multivariate analysis. Results: A total of 181 patients were recruited, and 277 patients with CKD stages 1-2 were chosen as controls. The majority choose the BCD and VRD regimens. The progression-free survival (PFS) (14.0 months vs 24.8 months, P<0.001) and overall survival (OS) (49.2 months vs 79.7 months, P<0.001) of patients with renal impairment was considerably shorter. Hypercalcemia (P=0.013, OR=5.654) , 1q21 amplification (P=0.018, OR=2.876) , and hematological response over a partial response (P=0.001, OR=4.999) were independent predictive factors for renal function response. After treatment, those with improvement in renal function had a longer PFS than those without (15.6 months vs 10.2 months, P=0.074) , but there was no disparity in OS (56.5 months vs 47.3 months, P=0.665) . Conclusion: Hypercalcemia, 1q21 amplification, and hematologic response were independent predictors of the response of renal function in NDMM patients with renal impairment. MM patients with CKD 3-5 at baseline still have worse survival. Improvement in renal function after treatment is attributed to the improvement in PFS.

Downstaging locally advanced hepatocellular carcinoma with selective internal radiation therapy.

536 Background: Locally advanced HCC (beyond BCLC A, including PVT but without extra-hepatic metastases) that are unresectable because of inadequate future liver remnant may be downstaged by selective internal radiation therapy (SIRT) with Yttrium-90 to subsequently receive interval surgical resection. We hypothesized that HCC that required downstaging before resection will have some disparity in overall survival (OS) and recurrence-free survival (RFS) compared to HCCs that were resected upfront. Methods: We reviewed all patients who underwent surgical resection for HCC between 1st January 2000 and 31st December 2019 and identified those that had locally advanced HCC and were downstaged with Y90-SIRT and referred for consideration of surgical resection. OS and RFS of patients resected upfront for early and locally advanced HCC and those resected after downstaging were obtained using the Kaplan Meier method and compared using Log-rank (Mantel-Cox) test after propensity score matching. Results: 1141 patients had surgical resection for HCC within the study period. 245 patients were excluded for other primary cancers or metastatic disease at diagnosis. 875 were resected upfront (473 early, 402 locally advanced) and 23 locally advanced HCC were downstaged with SIRT before resection. Locally advanced HCC patients downstaged with Y90 before resection have significantly better OS and RFS than locally advanced HCC with upfront resection (5-year OS of 69.0% versus 47.5% p = 0.048; 5-year RFS of 53.5% vs 27.0%, p = 0.047) and similar OS and RFS with resected early HCC (5-year OS of 69.0% versus 62.6% p=0.475; 5-year RFS of 53.5% vs 39.0%, p = 0.736). Conclusions: In addition to downstaging HCC to resection, Y90-SIRT also produces a change in tumour biology that favours better prognosis. A randomised controlled trial to the role of SIRT as neoadjuvant therapy in locally advanced HCC is justified and can potentially change practice.