Addressing Social Risks to Accelerate Health Equity in Cancer Prevention and Control.

Addressing social risks in cancer prevention and control presents a new opportunity for accelerating cancer health equity. As members of the American Society of Preventive Oncology (ASPO) Cancer Health Disparities Special Interest Group, we describe the current state of science on social risks in oncology research and practice. To reduce and eliminate the unjust burden of cancer, we also provide recommendations for multilevel research examining social risks as contributors to inequities and the development of social risks-focused interventions. Suggestions for research and practice are provided within levels of the socio-ecological model, including the interpersonal, organizational, community, and policy levels.

Age at diagnosis and social risks among Black cancer survivors: Results from the Detroit Research on Cancer Survivors cohort.

BACKGROUND: Social risks are common among cancer survivors who have the fewest financial resources; however, little is known about how prevalence differs by age at diagnosis, despite younger survivors' relatively low incomes and wealth. METHODS: The authors used data from 3703 participants in the Detroit Research on Cancer Survivors (ROCS) cohort of Black cancer survivors. Participants self-reported several forms of social risks, including food insecurity, housing instability, utility shut-offs, not getting care because of cost or lack of transportation, and feeling unsafe in their home neighborhood. Modified Poisson models were used to estimate prevalence ratios and 95% confidence intervals (CIs) of social risks by age at diagnosis, controlling for demographic, socioeconomic, and cancer-related factors. RESULTS: Overall, 35% of participants reported at least one social risk, and 17% reported two or more risks. Social risk prevalence was highest among young adults aged 20-39 years (47%) followed by those aged 40-54 years (43%), 55-64 years (38%), and 65 years and older (24%; p for trend < .001). Compared with survivors who were aged 65 years and older at diagnosis, adjusted prevalence ratios for any social risk were 1.75 (95% CI, 1.42-2.16) for survivors aged 20-39 years, 1.76 (95% CI, 1.52-2.03) for survivors aged 40-54 years, and 1.41 (95% CI, 1.23-1.60) for survivors aged 55-64 years at diagnosis. Similar associations were observed for individual social risks and experiencing two or more risks. CONCLUSIONS: In this population of Black cancer survivors, social risks were inversely associated with age at diagnosis. Diagnosis in young adulthood and middle age should be considered a risk factor for social risks and should be prioritized in work to reduce the financial effects of cancer on financially vulnerable cancer survivors.

Improving Uptake of Cancer Genetic Risk Assessment in a Remote Tailored Risk Communication and Navigation Intervention: Large Effect Size but Room to Grow.

PURPOSE: Cancer genetic risk assessment (CGRA) is recommended for women with ovarian cancer or high-risk breast cancer, yet fewer than 30% receive recommended genetic services, with the lowest rates among underserved populations. We hypothesized that compared with usual care (UC) and mailed targeted print (TP) education, CGRA uptake would be highest among women receiving a phone-based tailored risk counseling and navigation intervention (TCN). METHODS: In this three-arm randomized trial, women with ovarian or high-risk breast cancer were recruited from statewide cancer registries in Colorado, New Jersey, and New Mexico. Participants assigned to TP received a mailed educational brochure. Participants assigned to TCN received the mailed educational brochure, an initial phone-based psychoeducational session with a health coach, a follow-up letter, and a follow-up navigation phone call. RESULTS: Participants' average age was 61 years, 25.4% identified as Hispanic, 5.9% identified as non-Hispanic Black, and 17.5% lived in rural areas. At 6 months, more women in TCN received CGRA (18.7%) than those in TP (3%; odds ratio, 7.4; 95% CI, 3.0 to 18.3; P < .0001) or UC (2.5%; odds ratio, 8.9; 95% CI, 3.4 to 23.5; P < .0001). There were no significant differences in CGRA uptake between TP and UC. Commonly cited barriers to genetic counseling were lack of provider referral (33.7%) and cost (26.5%), whereas anticipated difficulty coping with test results (14.0%) and cost (41.2%) were barriers for genetic testing. CONCLUSION: TCN increased CGRA uptake in a group of geographically and ethnically diverse high-risk breast and ovarian cancer survivors. Remote personalized interventions that incorporate evidence-based health communication and behavior change strategies may increase CGRA among women recruited from statewide cancer registries.

The Balance Between Food and Medical Care: Experiences of Food Insecurity Among Cancer Survivors and Informal Caregivers.

Defined as an inability to acquire enough food because of insufficient money or other resources, the prevalence of food insecurity is markedly higher among cancer survivors than the general population. The objective of this qualitative study was to understand and characterize the experience of food insecurity from the perspective of cancer survivors' and their informal caregivers using qualitative interviews. Barriers to healthy eating, behaviors and strategies in times of food shortage, and unmet educational needs shaped the experience of food insecurity. These experiences and insights for addressing food insecurity in oncology practice have broad implications for future interventions.

A sequential explanatory study of the employment experiences of population-based breast, colorectal, and prostate cancer survivors.

PURPOSE: Cancer treatment often leads to work disruptions including loss of income, resulting in long-term financial instability for cancer survivors and their informal caregivers. METHODS: In this sequential explanatory study, we conducted a cross-sectional survey of employment experiences among ethnically diverse, working-age individuals diagnosed with breast, colorectal, or prostate cancer. Following the survey, we conducted semi-structured interviews with cancer survivors and informal caregivers to explore changes in employment status and coping techniques to manage these changes. RESULTS: Among employed survivors (n = 333), cancer caused numerous work disruptions including issues with physical tasks (53.8%), mental tasks (46.5%) and productivity (76.0%) in the workplace. Prostate cancer survivors reported fewer work disruptions than female breast and male and female colorectal cancer survivors. Paid time off and flexible work schedules were work accommodations reported by 52.6% and 36.3% of survivors, respectively. In an adjusted regression analysis, household income was positively associated with having received a work accommodation. From the qualitative component of the study (survivors n = 17; caregivers n = 11), three key themes emerged: work disruptions, work accommodations, and coping mechanisms to address the disruptions. Survivors and caregivers shared concerns about lack of support at work and resources to navigate issues caused by changes in employment. CONCLUSIONS: This study characterized employment changes among a diverse group of cancer survivors. Work accommodations were identified as a specific unmet need, particularly among low-income cancer survivors. Addressing changes in employment among specific groups of cancer survivors and caregivers is critical to mitigate potential long-term consequences of cancer.

Unmet Care Needs and Financial Hardship in Patients With Metastatic Non-Small-Cell Lung Cancer on Immunotherapy or Chemoimmunotherapy in Clinical Practice.

PURPOSE: Immunotherapy or chemoimmunotherapy is now standard treatment for most patients with metastatic non-small-cell lung cancer (mNSCLC), yet patient supportive care needs (SCNs) on immunotherapy are not well defined. This study characterized the SCNs and financial hardship of patients with mNSCLC treated with immunotherapy or chemoimmunotherapy and examined the relationship between patient and caregiver cancer-related employment reductions and patient financial hardship. METHODS: Patients with mNSCLC on immunotherapy or chemoimmunotherapy from a single academic medical center completed the SCNs Survey-34, items indexing material, psychological, and behavioral financial hardship, and the Comprehensive Score for Financial Toxicity. Univariate and bivariate analyses examined care needs, financial hardship, and impact of cancer-related employment reductions on patient financial hardship. RESULTS: Sixty patients (40% male; 75% White, mean age = 62.5 years, 57% on immunotherapy alone) participated. Fifty-five percent reported unmet needs in physical or daily living and psychological domains. Financial hardship was common (33% material, 63% psychological, and 57% behavioral). Fifty-two percent reported hardship in at least two domains. Forty percent reported a caregiver cancer-related employment reduction. Caregiver employment reduction was related to patient financial hardship (68% of those reporting caregiver employment reduction reported at least two domains of hardship v 40% of those without reduction, P = .03) and patient financial distress (mean Comprehensive Score for Financial Toxicity = 19.6 among those with caregiver employment reduction v 26.8 without, P = .01). CONCLUSION: Patients with mNSCLC treated with immunotherapy or chemoimmunotherapy report multiple unmet care needs and financial hardship. Psychological, functional, financial, and caregiver concerns merit assessment and intervention in this population.

Determinants of Guideline-Discordant Breast Cancer Care.

BACKGROUND: Evidence-based breast cancer treatment guidelines recommend the most appropriate course of therapy based on tumor characteristics and extent of disease. Evaluating the multilevel factors associated with guideline discordance is critical to identifying strategies to eliminate breast cancer survival disparities. METHODS: We identified females diagnosed with a first primary, stage I-III breast cancer between the ages of 20-69 years of age from the population-based Seattle-Puget Sound Surveillance, Epidemiology, and End Results registry. Participants completed a survey about social support, utilization of patient support services, hypothesized barriers to care, and initiation of breast cancer treatment. We used logistic regression to estimate odds ratios and 95% confidence intervals (CI). RESULTS: Among 1,390 participants, 10% reported guideline-discordant care. In analyses adjusted for patient-level sociodemographic factors, individuals who did not have someone to go with them to appointments or drive them home (OR 1.96; 95% CI, 1.09-3.59) and those who had problems talking to their doctors or their staff (OR 2.03; 95% CI, 1.13-3.64) were more likely to be guideline discordant than those with social support or without such problems, respectively. Use of patient support services was associated with a 43% lower odds of guideline discordance (OR 0.57; 95% CI, 0.36-0.88). CONCLUSIONS: Although guideline discordance in this cohort of early-stage breast cancer survivors diagnosed <70 years of age was low, instrumental social support, patient support services, and communication with doctors and their staff emerged as potential multilevel intervention targets for improving breast cancer care delivery. IMPACT: This study supports extending the reach of interventions designed to improve guideline concordance.

Social needs and health-related quality of life among African American cancer survivors: Results from the Detroit Research on Cancer Survivors study.

BACKGROUND: Social needs may affect cancer survivors' health-related quality of life (HRQOL) above and beyond sociodemographic and cancer-related factors. The purpose of this study was to estimate associations between social needs and HRQOL. METHODS: Results included data from 1754 participants in the Detroit Research on Cancer Survivors cohort, a population-based study of African American survivors of breast, colorectal, lung, and prostate cancer. Social needs included items related to food insecurity, utility shutoffs, housing instability, not getting health care because of cost or a lack of transportation, and perceptions of neighborhood safety. HRQOL was measured with the validated Functional Assessment of Cancer Therapy-General (FACT-G). Linear regression models controlled for demographic, socioeconomic, and cancer-related factors. RESULTS: More than one-third of the survivors (36.3%) reported social needs including 17.1% of survivors reported 2 or more. The prevalence of social needs ranged from 14.8% for food insecurity to 8.9% for utility shutoffs. FACT-G score differences associated with social needs were -12.2 (95% confidence interval [CI] to -15.2 to -9.3) for not getting care because of a lack of transportation, -11.3 (95% CI, -14.2 to -8.4) for housing instability, -10.1 (95% CI, -12.7 to -7.4) for food insecurity, -9.8 (95% CI, -12.7 to -6.9) for feeling unsafe in the neighborhood, -8.6 (95% CI, -11.7 to -5.4) for utility shutoffs, and -6.7 (95% CI, -9.2 to -4.1) for not getting care because of cost. CONCLUSIONS: Social needs were common in this cohort of African American cancer survivors and were associated with clinically significant differences in HRQOL. Clinical oncology care and survivorship care planning may present opportunities to screen for and address social needs to mitigate their impact on survivors' HRQOL.

Food Insecurity and Forgone Medical Care Among Cancer Survivors.

PURPOSE: Financial hardship is increasingly understood as a negative consequence of cancer and its treatment. As patients with cancer face financial challenges, they may be forced to make a trade-off between food and medical care. We characterized food insecurity and its relationship to treatment adherence in a population-based sample of cancer survivors. METHODS: Individuals 21 to 64 years old, diagnosed between 2008 and 2016 with stage I-III breast, colorectal, or prostate cancer were identified from the New Mexico Tumor Registry and invited to complete a survey, recalling their financial experience in the year before and the year after cancer diagnosis. Multivariable logistic regression was used to estimate odds ratios (ORs) and 95%CIs. RESULTS: Among 394 cancer survivors, 229 (58%) were food secure in both the year before and the year after cancer diagnosis (persistently food secure), 38 (10%) were food secure in the year before and food insecure in the year after diagnosis (newly food insecure), and 101 (26%) were food insecure at both times (persistently food insecure). Newly food-insecure (OR, 2.82; 95% CI, 1.02 to 7.79) and persistently food-insecure (OR, 3.04; 95% CI,1.36 to 6.77) cancer survivors were considerably more likely to forgo, delay, or make changes to prescription medication than persistently food-secure survivors. In addition, compared with persistently food-secure cancer survivors, newly food-insecure (OR, 9.23; 95% CI, 2.90 to 29.3), and persistently food-insecure (OR, 9.93; 95% CI, 3.53 to 27.9) cancer survivors were substantially more likely to forgo, delay, or make changes to treatment other than prescription medication. CONCLUSION: New and persistent food insecurity are negatively associated with treatment adherence. Efforts to screen for and address food insecurity among individuals undergoing cancer treatment should be investigated as a strategy to reduce socioeconomic disparities in cancer outcomes.

Obstetric Outcomes in Young Women with Breast Cancer: Prior, Postpartum, and Subsequent Pregnancies.

OBJECTIVE: This study aimed to describe obstetric outcomes in a large cohort of young women with breast cancer, considering the chronological relationship of pregnancies with breast cancer diagnosis. STUDY DESIGN: From a population-based cohort study of young women with breast cancer from 2004 to 2010, we conducted secondary interviews to obtain detailed obstetric histories. Pregnancies were categorized based on timing of breast cancer diagnosis: prior, postpartum, and subsequent pregnancies after breast cancer diagnosis. A generalized estimated equation model was used to account for correlated data. RESULTS: In this cohort (n = 366), median age at breast cancer diagnosis was 40.1 years, and 84.7% were Caucasian. Tumor type was notable for 25.1% triple negative, and 56.1% had Stage I disease. There were 922 prior pregnancies, 21 with postpartum diagnosis of breast cancer, and 24 pregnancies subsequent to breast cancer diagnosis. Non-live birth outcomes occurred significantly more often in the postpartum group (p-value: 0.001) compared with the other groups, which had higher live birth rates, after adjustment for maternal age, parity, body mass index, and race. CONCLUSION: Overall, pregnancy outcomes before and after breast cancer diagnosis are reassuring.

Relationship between Insurance Type at Diagnosis and Hepatocellular Carcinoma Survival.

BACKGROUND: For individuals with hepatocellular carcinoma (HCC), type of insurance may be an important prognostic factor because of its impact on access to care. This study investigates the relationship between insurance type at diagnosis and stage-specific survival. METHODS: This retrospective cohort analysis used data from 18 Surveillance, Epidemiology, and End Results Program cancer registries. Individuals ages 20 to 64 years, diagnosed with primary HCC between 2010 and 2015, with either private, Medicaid, or no insurance were eligible for cohort inclusion. Adjusted Cox proportional-hazards regression models were used to generate HRs and 95% confidence intervals (CI) for associations between insurance type at diagnosis and overall survival. All models were stratified by stage at diagnosis. RESULTS: This analysis included 14,655 cases. Compared with privately insured individuals with the same stage of disease, those with Medicaid had a 43% (HR = 1.43; 95% CI, 1.13-1.32), 22% (HR = 1.22; 95% CI, 1.13-1.32), and 7% higher risk of death for localized, regional, and distant stage, respectively. Uninsured individuals had an 88% (HR = 1.88; 95% CI, 1.65-2.14), 59% (HR = 1.59; 95% CI, 1.41-1.80), and 35% (HR = 1.35; 95% CI, 1.18-1.55) higher risk of death for localized, regional, and distant stage, respectively, compared with privately insured individuals. CONCLUSIONS: Disparities in survival exist by the type of insurance that individuals with HCC have at the time of diagnosis. IMPACT: These findings support the need for additional research on access to and quality of cancer care for Medicaid and uninsured patients.

Correlates of poor adherence to a healthy lifestyle among a diverse group of colorectal cancer survivors.

PURPOSE: Lifestyle factors may have a synergistic effect on health. We evaluated the correlates of poor adherence to a healthy lifestyle among a diverse sample of colorectal cancer (CRC) survivors to inform future lifestyle promotion programs. METHODS: Lifestyle questions from a cross-sectional survey were completed by 283 CRC survivors (41% Hispanic, 40% rural, 33% low income). Adherence to recommendations (yes/no) for physical activity, fruit and vegetable servings/day, avoiding tobacco, and healthy weight was summed to create an overall lifestyle quality score. Polytomous logistic regression was used to evaluate correlates of good (reference group), moderate, and poor overall lifestyle quality. Potential correlates included sociodemographic characteristics, cancer-related factors, and indicators of health and well-being. RESULTS: CRC survivors with poor adherence were 2- to 3.4-fold significantly more likely to report multiple comorbidities, poor physical functioning, fatigue, anxiety/depressive symptoms, and poor social participation. In multivariable analyses, poor physical functioning was the only significant correlate of poor adherence to lifestyle recommendations, compared to good adherence [OR (95% CI) 3.4 (1.8-6.4)]. The majority of survivors, 71% and 78%, indicated interest in receiving information on exercise and eating a healthy diet, respectively. CONCLUSION: Future lifestyle promotion programs for CRC survivors should carefully consider indicators of physical and psychosocial health and well-being, especially poor physical functioning, in the design, recruitment, and implementation of these health programs.

Intensity modulated radiation therapy following lumpectomy in early-stage breast cancer: Patterns of use and cost consequences among Medicare beneficiaries.

PURPOSE: In 2013, the American Society for Radiation Oncology (ASTRO) issued a Choosing Wisely recommendation against the routine use of intensity modulated radiotherapy (IMRT) for whole breast irradiation. We evaluated IMRT use and subsequent impact on Medicare expenditure in the period immediately preceding this recommendation to provide a baseline measure of IMRT use and associated cost consequences. METHODS AND MATERIALS: SEER records for women ≥66 years with first primary diagnosis of Stage I/II breast cancer (2008-2011) were linked with Medicare claims (2007-2012). Eligibility criteria included lumpectomy within 6 months of diagnosis and radiotherapy within 6 months of lumpectomy. We evaluated IMRT versus conventional radiotherapy (cRT) use overall and by SEER registry (12 sites). We used generalized estimating equations logit models to explore adjusted odds ratios (OR) for associations between clinical, sociodemographic, and health services characteristics and IMRT use. Mean costs were calculated from Medicare allowable costs in the year after diagnosis. RESULTS: Among 13,037 women, mean age was 74.4, 50.5% had left-sided breast cancer, and 19.8% received IMRT. IMRT use varied from 0% to 52% across SEER registries. In multivariable analysis, left-sided breast cancer (OR 1.75), living in a big metropolitan area (OR 2.39), living in a census tract with ≤$90,000 median income (OR 1.75), neutral or favorable local coverage determination (OR 3.86, 1.72, respectively), and free-standing treatment facility (OR 3.49) were associated with receipt of IMRT (p<0.001). Mean expenditure in the year after diagnosis was $8,499 greater (p<0.001) among women receiving IMRT versus cRT. CONCLUSION: We found highly variable use of IMRT and higher expenditure in the year after diagnosis among women treated with IMRT (vs. cRT) with early-stage breast cancer and Medicare insurance. Our findings suggest a considerable opportunity to reduce treatment variation and cost of care while improving alignment between practice and clinical guidelines.

Socioeconomic disparities in health-related quality of life among colorectal cancer survivors.

PURPOSE: Improvements in colorectal cancer (CRC) prevention, early detection, and treatment have resulted in substantial gains in survival. However, the health-related quality of life (HRQoL) of CRC survivors often depends on access to supportive care, which differs by survivors' socioeconomic characteristics. The purpose of this study was to investigate the relationship between socioeconomic characteristics and HRQoL in a diverse group of CRC survivors. METHODS: We conducted a population-based, cross-sectional study to examine the association between socioeconomic factors (household income, health literacy, and insurance status) and HRQoL domains of pain interference, fatigue, physical function, sleep disturbance, anxiety, and depression. PROMIS® Short Forms v.2.0 were used to assess domains of HRQoL. Linear regression modeling was used to estimate the coefficient representing the average HRQoL domain score and its 95% confidence interval (CI). RESULTS: Three hundred one CRC survivors participated in the survey. Low-income (≤ $30,000) CRC survivors had, on average, a 4.70-point (95% CI 1.10-8.28) higher pain interference score, a 7.02-point (95% CI 3.27-10.77) higher fatigue score, a 5.13-point (95% CI - 8.56 to - 1.71) lower physical function score, and a 4.44-point (95% 1.40-7.49) higher depression score than CRC survivors with an income ≥ $70,000. Survivors with Medicaid insurance reported significantly greater pain interference and worse physical function than privately insured survivors. Survivors with low health literacy reported significantly greater pain interference compared with survivors with high health literacy. CONCLUSIONS: Substantial socioeconomic disparities in HRQoL were observed in this diverse population of CRC survivors. IMPLICATIONS FOR CANCER SURVIVORS: Designing supportive care interventions to improve HRQoL among low-income and Medicaid-insured CRC survivors is critical for eliminating disparities in CRC outcomes.

Promoting guideline-based cancer genetic risk assessment for hereditary breast and ovarian cancer in ethnically and geographically diverse cancer survivors: Rationale and design of a 3-arm randomized controlled trial.

BACKGROUND: Although national guidelines for cancer genetic risk assessment (CGRA) for hereditary breast and ovarian cancer (HBOC) have been available for over two decades, less than half of high-risk women have accessed these services, especially underserved minority and rural populations. Identification of high-risk individuals is crucial for cancer survivors and their families to benefit from biomedical advances in cancer prevention, early detection, and treatment. METHODS: This paper describes community-engaged formative research and the protocol of the ongoing randomized 3-arm controlled Genetic Risk Assessment for Cancer Education and Empowerment (GRACE) trial. Ethnically and geographically diverse breast and ovarian cancer survivors at increased risk for hereditary cancer predisposition who have not had a CGRA are recruited through the three statewide cancer registries. The specific aims are to: 1) compare the effectiveness of a targeted intervention (TP) vs. a tailored counseling and navigation(TCN) intervention vs. usual care (UC) on CGRA utilization at 6 months post-diagnosis (primary outcome); compare the effectiveness of the interventions on genetic counseling uptake at 12 months after removal of cost barriers (secondary outcome); 2) examine potential underlying theoretical mediating and moderating mechanisms; and 3) conduct a cost evaluation to guide dissemination strategies. DISCUSSION: The ongoing GRACE trial addresses an important translational gap by developing and implementing evidence-based strategies to promote guideline-based care and reduce disparities in CGRA utilization among ethnically and geographically diverse women. If effective, these interventions have the potential to reach a large number of high-risk families and reduce disparities through broad dissemination. TRIAL REGISTRATION NUMBER: NCT03326713; clinicaltrials.gov.

Rural Disparities in Treatment-Related Financial Hardship and Adherence to Surveillance Colonoscopy in Diverse Colorectal Cancer Survivors.

Background: Cancer survivors increasingly report financial hardship as a consequence of the high cost of cancer care, yet the financial experience of rural cancer survivors remains largely unstudied. The purpose of this study was to investigate potential rural disparities in the likelihood of financial hardship and nonadherence to surveillance colonoscopy.Methods: Individuals diagnosed with localized or regional colorectal cancer between 2004 and 2012 were ascertained by the population-based New Mexico Tumor Registry. Participants completed a mailed questionnaire or telephone survey about their colorectal cancer survivorship experience, including treatment-related financial hardship and receipt of surveillance colonoscopy. Multivariable logistic regression was used to estimate adjusted odds ratios (ORs) and 95% confidence intervals (CIs).Results: Compared with urban colorectal cancer survivors (n = 168), rural colorectal cancer survivors (n = 109) were slightly older; more likely to be married (65% vs. 59%) and have an annual income <$30,000 (37% vs. 27%); and less likely to be employed (35% vs. 41%), have a college degree (28% vs. 38%), or a high level of health literacy (39% vs. 51%). Rural survivors were twice as likely as urban survivors to report treatment-related financial hardship (OR, 1.86; 95% CI, 1.06-3.28) and nonadherence to surveillance colonoscopy guidelines (OR, 2.28; 95% CI, 1.07-4.85). In addition, financial hardship was independently associated with nonadherence to surveillance colonoscopy (OR, 2.17; 95% CI, 1.01-4.85).Conclusions: Substantial rural disparities in the likelihood of financial hardship and nonadherence to surveillance colonoscopy exist.Impact: Treatment-related financial hardship among rural colorectal cancer survivors may negatively affect adherence to guideline-recommended follow-up care. Cancer Epidemiol Biomarkers Prev; 27(11); 1275-82. ©2018 AACR.

Indian Health Service Care System and Cancer Stage in American Indians and Alaska Natives.

PURPOSE: We aimed to determine whether the association between late-stage cancer and American Indian/Alaska Native (AI/AN) race differed by enrollment in the Indian Health Service Care System (IHSCS). METHODS: We used Surveillance, Epidemiology, and End Results (SEER) data linked to Medicare files to compare the odds of late-stage breast, colorectal, lung, or prostate cancer between non-Hispanic Whites (NHWs) (n=285,993) and AI/ANs with (n=581) and without (n=543) IHSCS enrollment. RESULTS: For AI/ANs without IHSCS enrollment, the odds of late-stage disease were higher in AI/ANs compared with NHWs for breast (OR=3.17, 95%CI: 1.82-5.53) and for prostate (OR=2.59, 95%CI:1.55-4.32) cancer, but not for colorectal or lung cancers. Among AI/ANs with IHSCS enrollment, there was not a significant association between late-stage disease and AI/AN race for any of the four cancers evaluated. CONCLUSION: Our results suggest that enrollment in the IHSCS reduced the disparity between AI/ANs and NHWs with respect to late-stage cancer diagnoses.

The Clinical and Economic Impacts of Skeletal-Related Events Among Medicare Enrollees With Prostate Cancer Metastatic to Bone.

BACKGROUND: Approximately 40% of men diagnosed with metastatic prostate cancer experience one or more skeletal-related events (SREs), defined as a pathological fracture, spinal cord compression, or surgery or radiotherapy to the bone. Accurate assessment of their effect on survival, health care resource utilization (HCRU), and cost may elucidate the value of interventions to prevent SREs. MATERIALS AND METHODS: Men older than age 65 years with prostate cancer and bone metastasis diagnosed between 2004 and 2009 were identified from linked Surveillance Epidemiology and End Results-Medicare records. Hazard ratios (HRs) and 95% confidence intervals (CIs) for the risk for death associated with SREs were calculated by using Cox regression. HCRU and costs (in 2013 U.S. dollars) were evaluated in a propensity score-matched cohort by using Poisson regression and Kaplan-Meier sample average estimators, respectively. RESULTS: Among 3,297 men with prostate cancer metastatic to bone, 40% experienced ≥1 SRE (median follow-up, 19 months). Compared with men who remained SRE-free, men with ≥1 SRE had a twofold higher risk for death (HR, 2.29; 95% CI, 2.09-2.51). Pathological fracture was associated with the highest risk for death (HR, 2.77; 95% CI, 2.38-3.23). Among men with ≥1 SRE, emergency department visits were twice as frequent (95% CI, 1.77-2.28) and hospitalizations were nearly four times as frequent (95% CI, 3.20-4.40). The attributable cost of ≥1 SRE was $21,191 (≥1 SRE: $72,454 [95% CI, $67,362-$76,958]; SRE-free: $51,263 [95% CI, $45,439-$56,100]). CONCLUSION: Among men with prostate cancer metastatic to bone, experiencing ≥1 SRE is associated with poorer survival, increased HCRU, and increased costs. These negative effects emphasize the importance of SRE prevention in this population.

Long-term statin use and risk of ductal and lobular breast cancer among women 55 to 74 years of age.

BACKGROUND: Mechanistic studies largely support the chemopreventive potential of statins. However, results of epidemiologic studies investigating statin use and breast cancer risk have been inconsistent and lacked the ability to evaluate long-term statin use. METHODS: We used data from a population-based case-control study of breast cancer conducted in the Seattle-Puget Sound region to investigate the relationship between long-term statin use and breast cancer risk. Nine hundred sixteen invasive ductal carcinoma (IDC) and 1,068 invasive lobular carcinoma (ILC) cases in patients 55 to 74 years of age diagnosed between 2000 and 2008 were compared with 902 control women. All participants were interviewed in-person and data on hypercholesterolemia and all episodes of lipid-lowering medication use were collected through a structured questionnaire. We assessed the relationship between statin use and IDC and ILC risk using polytomous logistic regression. RESULTS: Current users of statins for 10 years or longer had a 1.83-fold increased risk of IDC [95% confidence interval (CI): 1.14-2.93] and a 1.97-fold increased risk of ILC (95% CI: 1.25-3.12) compared with never users of statins. Among women diagnosed with hypercholesterolemia, current users of statins for 10 years or longer had more than double the risk of both IDC (OR: 2.04, 95% CI: 1.17-3.57) and ILC (OR: 2.43, 95% CI: 1.40-4.21) compared with never users. CONCLUSION: In this contemporary population-based case-control study, long-term use of statins was associated with increased risks of both IDC and ILC. IMPACT: Additional studies with similarly high frequencies of statin use for various durations are needed to confirm this novel finding.

Evaluation of seasonality in the diagnosis of acute myeloid leukaemia among adults in the United States, 1992-2008.

Recent studies have suggested seasonal variation in the diagnosis of acute myeloid leukaemia (AML), and the aetiological role seasonal factors may play in this group of haematological neoplasms remains unclear. We evaluated potential seasonality of AML diagnosis among adults. Cases included were ascertained from the Surveillance, Epidemiology, and End Results (SEER) 13 registries from 1992-2008. Chi-square analysis for heterogeneity and multiple Poisson regression using parametric harmonic modelling and bootstrap testing were used to detect possible monthly variation. Months of peak diagnoses were December and January, although some variation was present by sex and age. Heterogeneity across months was statistically significant (P < 0·001). In stratified analyses, monthly variation was detected only among males (P = 0·009) and in cases aged 65 years and older (P = 0·031). Poisson regression found no seasonal effect among all cases when fit to the sinusoidal model (P = 0·110). However, similar variation among males (P = 0·009) and cases aged 65 years and older (P = 0·018) was present. There is growing evidence of seasonality in AML diagnosis, particularly among older persons and men. Investigation of specific seasonal risk factors would be informative in explaining the aetiology behind the observed variation.