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Bekele BB, Lian M, Schmaltz C, Greever-Rice T, Shrestha P, Liu Y. Preexisting Diabetes and Breast Cancer Treatment Among Low-Income Women. JAMA Netw Open 2024; 7:e249548. [PMID: 38717774 PMCID: PMC11079686 DOI: 10.1001/jamanetworkopen.2024.9548] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/05/2023] [Accepted: 02/26/2024] [Indexed: 05/12/2024] Open
Abstract
IMPORTANCE Diabetes is associated with poorer prognosis of patients with breast cancer. The association between diabetes and adjuvant therapies for breast cancer remains uncertain. OBJECTIVE To comprehensively examine the associations of preexisting diabetes with radiotherapy, chemotherapy, and endocrine therapy in low-income women with breast cancer. DESIGN, SETTING, AND PARTICIPANTS This population-based cohort study included women younger than 65 years diagnosed with nonmetastatic breast cancer from 2007 through 2015, followed up through 2016, continuously enrolled in Medicaid, and identified from the linked Missouri Cancer Registry and Medicaid claims data set. Data were analyzed from January 2022 to October 2023. EXPOSURE Preexisting diabetes. MAIN OUTCOMES AND MEASURES Logistic regression was used to estimate odds ratios (ORs) of utilization (yes/no), timely initiation (≤90 days postsurgery), and completion of radiotherapy and chemotherapy, as well as adherence (medication possession ratio ≥80%) and persistence (<90-consecutive day gap) of endocrine therapy in the first year of treatment for women with diabetes compared with women without diabetes. Analyses were adjusted for sociodemographic and tumor factors. RESULTS Among 3704 women undergoing definitive surgery, the mean (SD) age was 51.4 (8.6) years, 1038 (28.1%) were non-Hispanic Black, 2598 (70.1%) were non-Hispanic White, 765 (20.7%) had a diabetes history, 2369 (64.0%) received radiotherapy, 2237 (60.4%) had chemotherapy, and 2505 (67.6%) took endocrine therapy. Compared with women without diabetes, women with diabetes were less likely to utilize radiotherapy (OR, 0.67; 95% CI, 0.53-0.86), receive chemotherapy (OR, 0.67; 95% CI, 0.48-0.93), complete chemotherapy (OR, 0.71; 95% CI, 0.50-0.99), and be adherent to endocrine therapy (OR, 0.71; 95% CI, 0.56-0.91). There were no significant associations of diabetes with utilization (OR, 0.95; 95% CI, 0.71-1.28) and persistence (OR, 1.09; 95% CI, 0.88-1.36) of endocrine therapy, timely initiation of radiotherapy (OR, 1.09; 95% CI, 0.86-1.38) and chemotherapy (OR, 1.09; 95% CI, 0.77-1.55), or completion of radiotherapy (OR, 1.25; 95% CI, 0.91-1.71). CONCLUSIONS AND RELEVANCE In this cohort study, preexisting diabetes was associated with subpar adjuvant therapies for breast cancer among low-income women. Improving diabetes management during cancer treatment is particularly important for low-income women with breast cancer who may have been disproportionately affected by diabetes and are likely to experience disparities in cancer treatment and outcomes.
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Affiliation(s)
- Bayu Begashaw Bekele
- Division of Public Health Sciences, Department of Surgery, Washington University School of Medicine, St Louis, Missouri
| | - Min Lian
- Alvin J. Siteman Cancer Center, Washington University School of Medicine, St Louis, Missouri
- Division of General Medical Sciences, Department of Medicine, Washington University School of Medicine, St Louis, Missouri
| | - Chester Schmaltz
- Department of Health Management and Informatics, University of Missouri School of Medicine, Columbia
| | | | - Pratibha Shrestha
- Division of Public Health Sciences, Department of Surgery, Washington University School of Medicine, St Louis, Missouri
| | - Ying Liu
- Division of Public Health Sciences, Department of Surgery, Washington University School of Medicine, St Louis, Missouri
- Alvin J. Siteman Cancer Center, Washington University School of Medicine, St Louis, Missouri
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Impact of diabetes (type 2) and glycemic control on health-related outcomes of patients receiving chemotherapy for non-metastatic breast cancer: a retrospective analysis. Support Care Cancer 2023; 31:114. [PMID: 36637522 DOI: 10.1007/s00520-022-07563-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2022] [Accepted: 12/21/2022] [Indexed: 01/14/2023]
Abstract
PURPOSE To examine the impact of diabetes (type 2) and glycemic control on healthcare-related outcomes (healthcare utilization, adverse effects, and treatment modifications) in non-metastatic breast cancer (NMBC) patients during chemotherapy treatment. METHODS This was a retrospective study of 243 NMBC patients (stages 1-3) with/without diabetes receiving neoadjuvant or adjuvant cytotoxic chemotherapy. The primary study endpoint was to compare healthcare utilization between NMBC patients with and without diabetes. Secondary study endpoints included adverse events and chemotherapy treatment modifications. Additional analyses were conducted to compare these health-related outcomes by glycemic control status. RESULTS NMBC patients with diabetes had higher utilization of emergency department (ED) services (52% vs. 33%, p = 0.013) and a higher frequency of unplanned inpatient admissions (35% vs. 19%, p = 0.014). Additionally, NMBC patients with diabetes had a higher incidence of infection and treatment modifications. NMBC patients, regardless of diabetes diagnosis, who had poor glycemic control, specifically hyperglycemia (per random blood glucose), during the study period also had increased healthcare utilization, adverse effects, and treatment modifications. Patients with a baseline HbA1c ≥ 7 had a greater number of ED visits and a higher incidence of infection than those without diabetes. CONCLUSION Diabetes and glycemic control may impact the health-related outcomes of NMBC patients. Additional studies are needed to confirm these findings and determine optimal monitoring and management strategies for NMBC patients with diabetes and/or poor glycemic control during cytotoxic chemotherapy.
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Siembida EJ, Smith AW, Potosky AL, Graves KD, Jensen RE. Examination of individual and multiple comorbid conditions and health-related quality of life in older cancer survivors. Qual Life Res 2021; 30:1119-1129. [PMID: 33447956 PMCID: PMC7808400 DOI: 10.1007/s11136-020-02713-0] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/15/2020] [Indexed: 01/31/2023]
Abstract
PURPOSE Older cancer survivors (≥ 65 years at diagnosis) are at high-risk for multimorbidity (2 + comorbid conditions). However, few studies have utilized a generalizable sample of older cancer survivors to understand how individual comorbid conditions, as opposed to total comorbidity burden, are associated with health-related quality of life (HRQOL). We examined associations between HRQOL outcomes (pain, fatigue, physical function), individual comorbidities (cardiovascular disease [CVD], lung disease, diabetes, arthritis) and total comorbidity (cancer-only, cancer + 1 condition, cancer + 2 or more conditions). METHODS Utilizing a population-based sample of 2019 older cancer survivors, we tested associations between comorbid conditions and the HRQOL outcomes using generalized linear models. HRQOL domains were assessed using Patient-Reported Outcome Measurement Information System® (PROMIS®) measures. Comorbidity was assessed via self-report. RESULTS Cancer survivors with lung disease reported significantly worse physical functioning (β = - 4.96, p < 0.001), survivors with arthritis reported significantly higher pain (β = 4.37, p < 0.001), and survivors with CVD reported significantly higher fatigue (β = 3.45, p < 0.001) compared to survivors without each condition. Having cancer + 1 condition was not as strongly associated with all outcomes as when individual conditions were tested (e.g. pain: β = 3.09, p < 0.001). Having 2+ comorbidities had a stronger association with all outcomes (e.g. physical function: β = - 7.51, p < 0.001) than examining conditions individually. CONCLUSIONS Knowing the specific comorbid condition profile of an older cancer survivor provides insight into specific HRQOL outcomes that may be impaired in cancer survivorship, but understanding total comorbidity burden, regardless of the specific conditions, sheds light on survivors at-risk for multiple impairments in HRQOL. This information, taken together, can inform risk-stratified survivorship care.
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Affiliation(s)
- Elizabeth J. Siembida
- Division of Cancer Control and Population Sciences, National Cancer Institute, Rockville, MD USA ,Cancer Prevention Fellowship Program, National Cancer Institute, Rockville, MD USA ,Center for Health Innovation and Outcomes Research, Feinstein Institute for Medical Research, Northwell Health, 600 Community Drive, Suite 403, Manhasset, NY 11030 USA
| | | | - Arnold L. Potosky
- Cancer Prevention and Control Program, Lombardi Comprehensive Cancer Center, Washington, DC USA
| | - Kristi D. Graves
- Cancer Prevention and Control Program, Lombardi Comprehensive Cancer Center, Washington, DC USA
| | - Roxanne E. Jensen
- Outcomes Research Branch, National Cancer Institute, Rockville, MD USA
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Nyrop KA, Damone EM, Deal AM, Carey LA, Lorentsen M, Shachar SS, Williams GW, Brenizer AT, Wheless A, Muss HB. Obesity, comorbidities, and treatment selection in Black and White women with early breast cancer. Cancer 2020; 127:922-930. [PMID: 33284988 DOI: 10.1002/cncr.33288] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2020] [Revised: 07/27/2020] [Accepted: 07/28/2020] [Indexed: 12/26/2022]
Abstract
BACKGROUND This study investigates obesity and comorbidity in Black and White women with early breast cancer (stages I-III) and their potential impact on treatment decisions for patients with hormone receptor-positive (HR+)/human epidermal growth factor receptor 2-negative (HER2-) tumors. METHODS In this retrospective chart review, comparisons of frequencies for Black and White patients were calculated with the Fisher exact test. Log binomial regression was used to estimate prevalence ratios (PRs) with 95% confidence intervals for total and individual comorbidities, and multivariable modeling was used to estimate PRs adjusted for age and body mass index (BMI). RESULTS In a sample of 548 patients, 26% were Black, and 74% were White. Sixty-two percent of Black patients and 32% of White patients were obese (BMI ≥ 30 kg/m2 ; P < .0001). Seventy-five percent of Black patients and 87% of White patients had HR+ tumors (P = .001). Significant intergroup differences were seen for 2 or more total comorbidities (62% of Blacks vs 47% of Whites; P = .001), 2 or more obesity-related comorbidities (33% vs 10%; P < .0001), hypertension (60% vs 32%; P < .0001), diabetes mellitus (23% vs 6%; P < .0001), hypercholesterolemia or hyperlipidemia (28% vs 18%; P = .02), and hypothyroidism (4% vs 11%; P = .012). In women with HR+/HER2- tumors, there were no intergroup differences in treatment decisions regarding the type of surgery, chemotherapy regimen, radiation, or endocrine treatment despite significant differences in the prevalence of obesity and comorbidities. CONCLUSIONS This study documents significant disparities between Black and White women with early breast cancer with regard to high rates of obesity, overall comorbidities, and obesity-related comorbidities, and it highlights the prevalence of competing risks that may complicate outcomes in breast cancer.
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Affiliation(s)
- Kirsten A Nyrop
- School of Medicine, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina.,Lineberger Comprehensive Cancer Center, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina
| | - Emily M Damone
- Gillings School of Global Public Health, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina
| | - Allison M Deal
- Lineberger Comprehensive Cancer Center, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina
| | - Lisa A Carey
- School of Medicine, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina.,Lineberger Comprehensive Cancer Center, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina
| | - Michael Lorentsen
- School of Medicine, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina
| | | | - Grant W Williams
- School of Medicine, University of Alabama at Birmingham, Birmingham, Alabama
| | - Addison Tucker Brenizer
- Lineberger Comprehensive Cancer Center, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina
| | - Amy Wheless
- Lineberger Comprehensive Cancer Center, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina
| | - Hyman B Muss
- School of Medicine, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina.,Lineberger Comprehensive Cancer Center, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina
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Association of Diabetes and Other Clinical and Sociodemographic Factors With Guideline-concordant Breast Cancer Treatment for Breast Cancer. Am J Clin Oncol 2020; 43:101-106. [PMID: 31850918 DOI: 10.1097/coc.0000000000000638] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
BACKGROUND Women with breast cancer have worse health outcomes with co-occurring type 2 diabetes, possibly due to suboptimal breast cancer treatment. METHODS We created a cohort of women ages 66 to 85 y with stage I to III breast cancer from 1993 to 2012 from an integrated health care delivery system (n=1612) and fee-for-service Medicare beneficiaries (n=98,915), linked to Surveillance, Epidemiology, and End Results (SEER) data (total n=100,527). We evaluated associations between type 2 diabetes and other factors with undergoing guideline-concordant cancer treatment. We estimated χ tests for univariate analysis and relative risks (RRs) using multivariable log-binomial models for outcomes of (1) overall guideline-concordant treatment, (2) definitive surgical therapy (mastectomy or lumpectomy with radiation), (3) chemotherapy if indicated, and (4) endocrine therapy. RESULTS Our cohort included 60% of subjects with stage 1 tumors, one quarter below 70 years old, 23% had diabetes, 35% underwent overall guideline-concordant treatment, 24% chemotherapy, and 83% endocrine therapy. Women with diabetes were less likely to undergo overall guideline-concordant treatment (RR: 0.96; 95% confidence interval: 0.94-0.98), and only slightly less likely to undergo guideline-concordant definitive surgical therapy (RR: 0.99; 95% confidence interval: 0.99-1.00). No differences were found for chemotherapy or endocrine therapy. Other factors significantly associated with a lower risk of guideline-concordant care were cancer stages II to III (vs. I; RR=0.47-0.69, P<0.0001), older age (vs. 66 to 69 y; RR=0.56-0.90, P<0.0001), higher comorbidity burden, and Medicaid dual-eligibility. CONCLUSIONS Diabetes was associated with lower adherence to overall guideline-concordant breast cancer treatment. However, higher stage, older age, higher comorbidity burden, and Medicaid insurance were more strongly associated with lower use of guideline-concordant treatment. Given the heavy burden of breast cancer and diabetes, long-term outcomes analysis should consider guideline-concordant treatment. IMPACT Other factors besides diabetes are more strongly associated with guideline-concordant breast cancer treatment.
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Lu S, Wang A, Miao S, Zhang X, Jing S, Shan T, Guo Y, Liu Y. Association between type 2 diabetes and cancer incidence in China: data in hospitalized patients from 2006 to 2013. ANNALS OF TRANSLATIONAL MEDICINE 2020; 8:176. [PMID: 32309323 PMCID: PMC7154402 DOI: 10.21037/atm.2020.01.101] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Background Evidence of a role for type 2 diabetes in overall cancer risk is limited in ethnic Chinese populations. We therefore investigated whether there is an association between diabetes and cancer incidence. Methods All type 2 diabetes and cancer hospitalized patients from the First Affiliated Hospital of Nanjing Medical University between 2006.01 and 2013.12 were eligible for the study. Our research used healthcare information technology and statistical methods to analyze the clinical data of hospitalized patients and explored the relationship between diabetes and cancer. Participants with fasting glucose ≥126 mg/dL, or taking hypoglycemic medications, were classed as having type 2 diabetes. Cancer incidence was established through regular follow-up interviews and medical records. Data were entered into Excel and a database was set up with ACCESS software. Clinical information such as demographics like gender, age, occupation, marriage, insurance and etc., diagnoses, and prescription record were chosen and analyzed. SPSS software was also used for statistical analysis. Results The number of patients with both diabetes and cancer rose from 220 cases in 2006 to 1,623 cases in 2013. The proportion of cancer patients with diabetes has also increased every year. Younger participants (aged ≤50 years) with diabetes had a greater risk of all cancers [P<0.005, odds ratio (OR) >3.4]. And cancer patients with diabetes occurs more frequently in male patients than in female patients, especially since 2009 the proportion has increased more evidently (P<0.005, OR >1.4). Further analysis showed that the level of blood lipid in patients with diabetes mellitus and cancer was significantly different from that in patients with simple diabetes mellitus (P<0.05). Conclusions Our results clearly demonstrate a positive association between diabetes and cancer, especially in younger individuals aged less than 50 years. This finding highlights a need for greater awareness among public health workers and physicians of the importance of effective control of diabetes in the younger population.
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Affiliation(s)
- Shan Lu
- Health Education Section of the Outpatient Department, the First Affiliated Hospital, Nanjing Medical University, Nanjing 210029, China
| | - Anzhi Wang
- Engineering Research Center of Health Service System Based on Ubiquitous Wireless Networks, Ministry of Education, Nanjing University of Posts and Telecommunications, Nanjing 210023, China
| | - Shumei Miao
- Department of Information, the First Affiliated Hospital, Nanjing Medical University, Nanjing 210029, China
| | - Xin Zhang
- Department of Information, the First Affiliated Hospital, Nanjing Medical University, Nanjing 210029, China
| | - Shenqi Jing
- Department of Information, the First Affiliated Hospital, Nanjing Medical University, Nanjing 210029, China
| | - Tao Shan
- Department of Information, the First Affiliated Hospital, Nanjing Medical University, Nanjing 210029, China
| | - Yongan Guo
- Engineering Research Center of Health Service System Based on Ubiquitous Wireless Networks, Ministry of Education, Nanjing University of Posts and Telecommunications, Nanjing 210023, China
| | - Yun Liu
- Department of Information, the First Affiliated Hospital, Nanjing Medical University, Nanjing 210029, China
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Lega IC, Austin PC, Fischer HD, Fung K, Krzyzanowska MK, Amir E, Lipscombe LL. The Impact of Diabetes on Breast Cancer Treatments and Outcomes: A Population-Based Study. Diabetes Care 2018; 41:755-761. [PMID: 29351960 DOI: 10.2337/dc17-2012] [Citation(s) in RCA: 49] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/26/2017] [Accepted: 12/19/2017] [Indexed: 02/03/2023]
Abstract
OBJECTIVE Women with breast cancer and diabetes face worse outcomes than those with breast cancer without diabetes; however, the contribution of comorbidity to these disparities remains unclear. We evaluated the impact of diabetes on receipt of cancer treatments as well as mortality while accounting for other comorbidities. RESEARCH DESIGN AND METHODS Ontario administrative databases were used to compare the rate of receipt of breast cancer treatments between women with and without diabetes. We also performed adjusted cause-specific hazard models to account for comorbidities when evaluating differences in treatments received and mortality outcomes between the two groups. RESULTS Women with diabetes and stage III breast cancer were slightly less likely to receive chemotherapy (relative risk [RR] 0.93 [95% CI 0.89-0.97]), although this difference was not significant when we adjusted for comorbidities (adjusted hazard ratio [aHR] 1.03 [95% CI 0.93-1.13]). We saw similar trends for receipt of guideline-adherent radiotherapy (RR 0.97 [0.95-0.99], aHR 0.98 [0.94-1.02]). All-cause mortality was increased in women with diabetes after adjusting for comorbidities (aHR 1.16 [1.06-1.27]), but breast cancer-specific mortality was not increased overall. Women with a longer duration of diabetes and those with preexisting cardiovascular disease had increased all-cause and cancer-specific mortality. CONCLUSIONS Although cancer treatments received were similar between women with and without diabetes, breast cancer-specific mortality remains higher among women with diabetes who have longer diabetes duration or preexisting cardiovascular disease. This study uncovers new information about key risk factors for poorer prognosis in women with diabetes and breast cancer.
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Affiliation(s)
- Iliana C Lega
- Women's College Research Institute, University of Toronto, Toronto, Ontario, Canada
| | - Peter C Austin
- Institute for Clinical Evaluative Sciences, Toronto, Ontario, Canada
| | - Hadas D Fischer
- Institute for Clinical Evaluative Sciences, Toronto, Ontario, Canada
| | - Kinwah Fung
- Institute for Clinical Evaluative Sciences, Toronto, Ontario, Canada
| | - Monika K Krzyzanowska
- University Health Network-Princess Margaret Cancer Centre, University of Toronto, Toronto, Ontario, Canada
| | - Eitan Amir
- University Health Network-Princess Margaret Cancer Centre, University of Toronto, Toronto, Ontario, Canada
| | - Lorraine L Lipscombe
- Women's College Research Institute, University of Toronto, Toronto, Ontario, Canada.,Institute for Clinical Evaluative Sciences, Toronto, Ontario, Canada
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Shao S, Gill AA, Zahm SH, Jatoi I, Shriver CD, McGlynn KA, Zhu K. Diabetes and Overall Survival among Breast Cancer Patients in the U.S. Military Health System. Cancer Epidemiol Biomarkers Prev 2017; 27:50-57. [PMID: 29097445 DOI: 10.1158/1055-9965.epi-17-0439] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2017] [Revised: 07/26/2017] [Accepted: 10/09/2017] [Indexed: 11/16/2022] Open
Abstract
Background: Although research suggests that type II diabetes mellitus (DM-2) is associated with overall and breast cancer-specific decreased survival, most prior studies of breast cancer survival investigated the effect of preexisting DM-2 without assessing the effect of DM-2 diagnosed at or after breast cancer diagnosis. This study examined the relationship between DM-2 diagnosed before and after breast cancer diagnosis and overall survival.Methods: This study uses linked Department of Defense cancer registry and medical claims data from 9,398 women diagnosed with breast cancer between 1998 and 2007. Cox proportional hazards models were used to assess the association between DM-2 and overall survival.Results: Our analyses showed that women with DM-2 diagnosed before breast cancer diagnosis tended to have a higher risk of mortality compared with women without diabetes [HR = 1.17; 95% confidence interval (CI), 0.95-1.44] after adjustment for potential confounders. Similarly, patients diagnosed with DM-2 at or after breast cancer diagnosis had increased mortality compared with women without DM-2 (HR = 1.39; 95% CI, 1.16-1.66). The similar tendency was also observed among most subgroups when results were stratified by race, menopausal status, obesity, tumor hormone receptor status, and stage.Conclusions: Using data from a health system that provides universal health care to its beneficiaries, this study showed an increased risk of death associated with DM-2, regardless of whether it was diagnosed before or at/after breast cancer diagnosis.Impact: These results suggest the potential effects of factors independent of the timing of DM-2 clinical diagnosis on the association of DM-2 with overall survival. Cancer Epidemiol Biomarkers Prev; 27(1); 50-57. ©2017 AACR.
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Affiliation(s)
- Stephanie Shao
- John P. Murtha Cancer Center at Walter Reed National Military Medical Center, Bethesda, Maryland
| | - Abegail A Gill
- John P. Murtha Cancer Center at Walter Reed National Military Medical Center, Bethesda, Maryland
| | - Shelia H Zahm
- Division of Cancer Epidemiology and Genetics, NCI, Bethesda, Maryland
| | - Ismail Jatoi
- The University of Texas Health Science Center at San Antonio, San Antonio, Texas
| | - Craig D Shriver
- John P. Murtha Cancer Center at Walter Reed National Military Medical Center, Bethesda, Maryland.,General Surgery Service, Walter Reed National Military Medical Center, Bethesda, Maryland.,Uniformed Services University, Bethesda, Maryland
| | | | - Kangmin Zhu
- John P. Murtha Cancer Center at Walter Reed National Military Medical Center, Bethesda, Maryland. .,Uniformed Services University, Bethesda, Maryland
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Influence of comorbidity on chemotherapy use for early breast cancer: systematic review and meta-analysis. Breast Cancer Res Treat 2017; 165:17-39. [DOI: 10.1007/s10549-017-4295-4] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2017] [Accepted: 05/13/2017] [Indexed: 10/19/2022]
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Nickel KB, Wallace AE, Warren DK, Ball KE, Mines D, Fraser VJ, Olsen MA. Modification of claims-based measures improves identification of comorbidities in non-elderly women undergoing mastectomy for breast cancer: a retrospective cohort study. BMC Health Serv Res 2016; 16:388. [PMID: 27527888 PMCID: PMC4986377 DOI: 10.1186/s12913-016-1636-7] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2015] [Accepted: 08/04/2016] [Indexed: 11/25/2022] Open
Abstract
Background Accurate identification of underlying health conditions is important to fully adjust for confounders in studies using insurer claims data. Our objective was to evaluate the ability of four modifications to a standard claims-based measure to estimate the prevalence of select comorbid conditions compared with national prevalence estimates. Methods In a cohort of 11,973 privately insured women aged 18–64 years with mastectomy from 1/04–12/11 in the HealthCore Integrated Research Database, we identified diabetes, hypertension, deficiency anemia, smoking, and obesity from inpatient and outpatient claims for the year prior to surgery using four different algorithms. The standard comorbidity measure was compared to revised algorithms which included outpatient medications for diabetes, hypertension and smoking; an expanded timeframe encompassing the mastectomy admission; and an adjusted time interval and number of required outpatient claims. A χ2 test of proportions was used to compare prevalence estimates for 5 conditions in the mastectomy population to national health survey datasets (Behavioral Risk Factor Surveillance System and the National Health and Nutrition Examination Survey). Medical record review was conducted for a sample of women to validate the identification of smoking and obesity. Results Compared to the standard claims algorithm, use of the modified algorithms increased prevalence from 4.79 to 6.79 % for diabetes, 14.75 to 24.87 % for hypertension, 4.23 to 6.65 % for deficiency anemia, 1.78 to 12.87 % for smoking, and 1.14 to 6.31 % for obesity. The revised estimates were more similar, but not statistically equivalent, to nationally reported prevalence estimates. Medical record review revealed low sensitivity (17.86 %) to capture obesity in the claims, moderate negative predictive value (NPV, 71.78 %) and high specificity (99.15 %) and positive predictive value (PPV, 90.91 %); the claims algorithm for current smoking had relatively low sensitivity (62.50 %) and PPV (50.00 %), but high specificity (92.19 %) and NPV (95.16 %). Conclusions Modifications to a standard comorbidity measure resulted in prevalence estimates that were closer to expected estimates for non-elderly women than the standard measure. Adjustment of the standard claims algorithm to identify underlying comorbid conditions should be considered depending on the specific conditions and the patient population studied. Electronic supplementary material The online version of this article (doi:10.1186/s12913-016-1636-7) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Katelin B Nickel
- Division of Infectious Diseases, Department of Medicine, Washington University School of Medicine, 660 South Euclid Ave. Campus Box 8051, St. Louis, MO, 63110, USA
| | - Anna E Wallace
- HealthCore, Inc., 123 Justison St Suite 200, Wilmington, DE, 19801, USA
| | - David K Warren
- Division of Infectious Diseases, Department of Medicine, Washington University School of Medicine, 660 South Euclid Ave. Campus Box 8051, St. Louis, MO, 63110, USA
| | - Kelly E Ball
- Division of Infectious Diseases, Department of Medicine, Washington University School of Medicine, 660 South Euclid Ave. Campus Box 8051, St. Louis, MO, 63110, USA
| | - Daniel Mines
- HealthCore, Inc., 123 Justison St Suite 200, Wilmington, DE, 19801, USA
| | - Victoria J Fraser
- Division of Infectious Diseases, Department of Medicine, Washington University School of Medicine, 660 South Euclid Ave. Campus Box 8051, St. Louis, MO, 63110, USA
| | - Margaret A Olsen
- Division of Infectious Diseases, Department of Medicine, Washington University School of Medicine, 660 South Euclid Ave. Campus Box 8051, St. Louis, MO, 63110, USA. .,Division of Public Health Sciences, Department of Surgery, Washington University School of Medicine, 660 South Euclid Ave. Campus Box 8100, St. Louis, MO, 63110, USA.
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Associations between diabetes medication use and risk of second breast cancer events and mortality. Cancer Causes Control 2015; 26:1065-77. [PMID: 25956271 DOI: 10.1007/s10552-015-0599-z] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2014] [Accepted: 05/03/2015] [Indexed: 12/18/2022]
Abstract
PURPOSE Diabetes and certain diabetes medications have been shown to influence breast cancer (BC) risk. Less is known about their relation to BC outcomes. Our objective was to evaluate the effects of diabetes and diabetes medications on risk of second breast cancer events (SBCE) and mortality. METHODS This population-based cohort study was conducted among women diagnosed with early-stage (I-II) BC and enrolled in an integrated health plan. Exposures of interest were diabetes and medication classes including insulin, metformin, and sulfonylureas. Outcomes of interest were SBCE defined as recurrence or second primary BC, BC-specific mortality, and all-cause mortality. We used multivariable Cox proportional hazards models to estimate hazard ratios (HR) and 95 % confidence intervals (CI) for diabetes and medication use while accounting for potential confounders and competing risks. RESULTS Among 4,216 women, 13 % developed SBCE during a median follow-up of 6.3 years. 610 women had diabetes of which 76 % used oral diabetes medication and/or insulin. Findings suggested that diabetes increased the risk of recurrence (HR = 1.57; 95 % CI 1.09-2.25) but not overall SBCE (HR = 1.29; 95 % CI 0.94-1.76) or second primary BC (HR = 0.74; 95 % CI 0.39-1.41). Among women with diabetes, insulin use was associated with increased risks of recurrence (HR = 1.94; 95 % CI 1.08-3.48) and all-cause mortality (HR = 2.33; 95 % CI 1.70-3.20). Metformin use was associated with lower all-cause mortality (HR = 0.55; 95 % CI 0.38-0.79). CONCLUSIONS Our findings show an association between diabetes and increased recurrence risk, and risk may be greater among insulin users. Metformin may reduce all-cause mortality among BC survivors. Given the growing breast cancer survivor population, further research in larger, more diverse populations is warranted.
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Comorbidities and Their Management: Potential Impact on Breast Cancer Outcomes. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2015; 862:155-75. [DOI: 10.1007/978-3-319-16366-6_11] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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