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Research Studies is a compilation of published research articles funded by AHRQ or authored by AHRQ researchers.
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1 to 19 of 19 Research Studies DisplayedChilders CP, Childers KK, Maggard-Gibbons M
National estimates of genetic testing in women with a history of breast or ovarian cancer.
In the United States, 3.8 million women have a history of breast (BC) or ovarian cancer (OC). Up to 15 percent of cases are attributable to heritable mutations, which, if identified, provide critical knowledge for treatment and preventive care. This study found that fewer than one in five individuals with a history of BC or OC meeting select National Cancer Comprehensive Network criteria have undergone genetic testing.
AHRQ-funded; HS025079.
Citation: Childers CP, Childers KK, Maggard-Gibbons M .
National estimates of genetic testing in women with a history of breast or ovarian cancer.
J Clin Oncol 2017 Dec 1;35(34):3800-06. doi: 10.1200/jco.2017.73.6314.
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Keywords: Cancer, Cancer: Breast Cancer, Cancer: Ovarian Cancer, Family Health and History, Genetics, Quality of Care, Screening, Women
Kelly G, Wang SY, Lucas G
Facilitating meaningful engagement on community advisory committees in patient-centered outcome research.
In this study, the investigators conducted a process evaluation of ongoing activities of a Patient Advisory Committee (PAC) formed around the development of an individualized decision aid for older women with early stage breast cancer. They indicated that their results suggested that engaging committee members in a process of evaluation and collective reflection during a research collaboration can break down barriers to collaboration, build relationships, create opportunities for co-learning and strengthen researchers' capacity to engage meaningfully with stakeholders.
AHRQ-funded; HS023900.
Citation: Kelly G, Wang SY, Lucas G .
Facilitating meaningful engagement on community advisory committees in patient-centered outcome research.
Prog Community Health Partnersh 2017;11(3):243-51. doi: 10.1353/cpr.2017.0029..
Keywords: Cancer, Cancer: Breast Cancer, Patient-Centered Healthcare, Patient-Centered Outcomes Research, Research Methodologies
Rauscher GH, Dabbous F, Dolecek TA
Absence of an anticipated racial disparity in interval breast cancer within a large health care organization.
The researchers sought to estimate the extent of an anticipated racial disparity in interval breast cancer (IBC) within a single, large health care organization. Contrary to expectation, in patient-adjusted models, there was no IBC racial disparity. The sorting of patients by race across facilities appears to have mitigated an otherwise anticipated disparity in IBC.
AHRQ-funded; HS018366.
Citation: Rauscher GH, Dabbous F, Dolecek TA .
Absence of an anticipated racial disparity in interval breast cancer within a large health care organization.
Ann Epidemiol 2017 Oct;27(10):654-58. doi: 10.1016/j.annepidem.2017.09.002.
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Keywords: Cancer: Breast Cancer, Cancer, Disparities, Racial and Ethnic Minorities, Women, Screening, Screening, Imaging
Farias AJ, Du XL
Racial differences in adjuvant endocrine therapy use and discontinuation in association with mortality among Medicare breast cancer patients by receptor status.
The purpose of this study was to determine whether racial/ethnic differences in use and discontinuation of adjuvant endocrine therapy (AET) differed by hormone receptor status and whether discontinuation was associated with mortality. There are racial/ethnic differences in AET use and discontinuation. Discontinuing treatment was associated with higher risk of all-cause and cancer-specific mortality regardless of hormone receptor status.
AHRQ-funded; HS018956.
Citation: Farias AJ, Du XL .
Racial differences in adjuvant endocrine therapy use and discontinuation in association with mortality among Medicare breast cancer patients by receptor status.
Cancer Epidemiol Biomarkers Prev 2017 Aug;26(8):1266-75. doi: 10.1158/1055-9965.epi-17-0280.
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Keywords: Cancer: Breast Cancer, Disparities, Elderly, Mortality, Racial and Ethnic Minorities
Wang SY, Kelly G, Gross C
Information needs of older women with early-stage breast cancer when making radiation therapy decisions.
The researchers identified the information older women with early-stage breast cancer need when making radiation therapy decisions, and who patients identify as the main decision maker. They found that older women consider themselves to be the main decision maker; they desire information and have more agency and input in the decision-making process than prior literature would suggest.
AHRQ-funded; HS023900.
Citation: Wang SY, Kelly G, Gross C .
Information needs of older women with early-stage breast cancer when making radiation therapy decisions.
Int J Radiat Oncol Biol Phys 2017 Jul 15;98(4):733-40. doi: 10.1016/j.ijrobp.2017.02.001.
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Keywords: Cancer: Breast Cancer, Decision Making, Education: Patient and Caregiver, Treatments
Ballard TNS, Zhong L, Momoh AO
Improved rates of immediate breast reconstruction at safety net hospitals.
Although disparities in receipt of breast reconstruction persist at the patient level, the extent to which hospital factors contribute to these differences remains unclear. This study concluded that, after accounting for sociodemographic factors, women undergoing mastectomies at safety net hospitals remain less likely to undergo immediate breast reconstruction. However, the differences in rates of reconstruction between safety net and non-safety net hospitals have narrowed over time.
AHRQ-funded; HS023313.
Citation: Ballard TNS, Zhong L, Momoh AO .
Improved rates of immediate breast reconstruction at safety net hospitals.
Plast Reconstr Surg 2017 Jul;140(1):1-10. doi: 10.1097/prs.0000000000003412.
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Keywords: Healthcare Cost and Utilization Project (HCUP), Cancer: Breast Cancer, Cancer, Surgery
Aliu O, Zhong L, Chetta MD
Comparing health care resource use between implant and autologous reconstruction of the irradiated breast: a national claims-based assessment.
Nationwide data were used to examine health care resource use associated with implant and autologous reconstruction. Thirty-two percent of implant reconstructions failed, compared with 5 percent of autologous cases. In aggregate, failures constituted more than 20 percent of the cumulative costs of implant reconstruction compared with less than 5 percent for autologous reconstruction.
AHRQ-funded; HS023313.
Citation: Aliu O, Zhong L, Chetta MD .
Comparing health care resource use between implant and autologous reconstruction of the irradiated breast: a national claims-based assessment.
Plast Reconstr Surg 2017 Jun;139(6):1224e-31e. doi: 10.1097/prs.0000000000003336.
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Keywords: Cancer: Breast Cancer, Healthcare Costs, Surgery
Taylor C, Correa C, Duane FK
Estimating the risks of breast cancer radiotherapy: evidence from modern radiation doses to the lungs and heart and from previous randomized trials.
The researchers estimated the absolute long-term risks of modern breast cancer radiotherapy. They concluded that, for long-term smokers, the absolute risks of modern radiotherapy may outweigh the benefits, yet for most nonsmokers (and ex-smokers), the benefits of radiotherapy far outweigh the risks. Hence, smoking can determine the net effect of radiotherapy on mortality, but smoking cessation substantially reduces radiotherapy risk.
AHRQ-funded; HS021681.
Citation: Taylor C, Correa C, Duane FK .
Estimating the risks of breast cancer radiotherapy: evidence from modern radiation doses to the lungs and heart and from previous randomized trials.
J Clin Oncol 2017 May 20;35(15):1641-49. doi: 10.1200/jco.2016.72.0722.
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Keywords: Adverse Events, Cancer: Breast Cancer, Risk, Treatments
Vyas A, Madhavan SS, Sambamoorthi U
Differences in Medicare expenditures between Appalachian and nationally representative cohorts of elderly women with breast cancer: an application of decomposition technique.
The objective of this study was to determine Medicare expenditures during the initial phase of care among women in West Virginia (WV) who were Medicare beneficiaries with BC and compare them with national estimates. It found that the difference in average Medicare expenditures between the elderly beneficiaries with BC from a rural state (WV) and their national counterparts narrowed but remained significantly lower after multivariate adjustment.
AHRQ-funded; HS018622.
Citation: Vyas A, Madhavan SS, Sambamoorthi U .
Differences in Medicare expenditures between Appalachian and nationally representative cohorts of elderly women with breast cancer: an application of decomposition technique.
J Natl Compr Canc Netw 2017 May;15(5):578-87.
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Keywords: Cancer: Breast Cancer, Elderly, Healthcare Costs, Medicare, Rural Health
Inrig SJ, Higashi RT, Tiro JA
Assessing local capacity to expand rural breast cancer screening and patient navigation: an iterative mixed-method tool.
To expand rural breast cancer screening , the researchers proposed a regional hub-and-spoke model, partnering with local providers to expand access across North Texas. Their capacity assessment tool enabled the hub to establish partnerships with county organizations by tailoring support to local capacity and needs.
AHRQ-funded; HS022418.
Citation: Inrig SJ, Higashi RT, Tiro JA .
Assessing local capacity to expand rural breast cancer screening and patient navigation: an iterative mixed-method tool.
Eval Program Plann 2017 Apr;61:113-24. doi: 10.1016/j.evalprogplan.2016.11.006.
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Keywords: Access to Care, Cancer: Breast Cancer, Patient-Centered Healthcare, Rural Health, Screening
Chetta MD, Aliu O, Zhong L
Reconstruction of the irradiated breast: a national claims-based assessment of postoperative morbidity.
This study aims to assess the morbidity associated with various breast reconstruction techniques in irradiated patients. It found that overall complication rates were 45.3 percent and 30.8 percent for patients with implant and autologous reconstruction, respectively. Failure of reconstruction occurred in 29.4 percent of patients with implant reconstruction compared with 4.3 percent of patients with autologous reconstruction.
AHRQ-funded; HS023313.
Citation: Chetta MD, Aliu O, Zhong L .
Reconstruction of the irradiated breast: a national claims-based assessment of postoperative morbidity.
Plast Reconstr Surg 2017 Apr;139(4):783-92. doi: 10.1097/prs.0000000000003168.
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Keywords: Cancer, Cancer: Breast Cancer, Surgery, Adverse Events, Patient-Centered Outcomes Research
Kao CJ, Wurz GT, Lin YC
Repurposing ospemifene for potentiating an antigen-specific immune response.
The overall objective of the present series of preclinical studies was to evaluate the immunomodulatory activity of ospemifene in combination with a peptide cancer vaccine. The authors concluded that, taken together, ospemifene's dose response and schedule-dependent immune modulating activity offers a method of tailoring and augmenting the efficacy of previously failed antigen-specific cancer vaccines for a wide range of malignancies.
AHRQ-funded; HS022236.
Citation: Kao CJ, Wurz GT, Lin YC .
Repurposing ospemifene for potentiating an antigen-specific immune response.
Menopause 2017 Apr;24(4):437-51. doi: 10.1097/gme.0000000000000776.
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Keywords: Cancer: Breast Cancer, Cancer: Lung Cancer, Medication, Vaccination
Dabbous FM, Dolecek TA, Berbaum ML
Impact of a false-positive screening mammogram on subsequent screening behavior and stage at breast cancer diagnosis.
Researchers sought to examine the impact of a false positive (FP) screening mammogram on the subsequent screening mammography behavior. They found that experiencing a FP mammogram increases the risk of late stage at diagnosis compared with prior true negative (TN) mammogram Also, women with a FP mammogram were more likely to delay their subsequent screening compared with women with a TN mammogram.
AHRQ-funded; HS018366.
Citation: Dabbous FM, Dolecek TA, Berbaum ML .
Impact of a false-positive screening mammogram on subsequent screening behavior and stage at breast cancer diagnosis.
Cancer Epidemiol Biomarkers Prev 2017 Mar;26(3):397-403. doi: 10.1158/1055-9965.epi-16-0524.
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Keywords: Cancer: Breast Cancer, Cancer, Imaging, Screening, Diagnostic Safety and Quality, Women, Prevention
Harowicz MR, Robinson TJ, Dinan MA
Algorithms for prediction of the Oncotype DX recurrence score using clinicopathologic data: a review and comparison using an independent dataset.
This study analyzed 305 patients with invasive breast cancer who had Oncotype DX recurrence scores (ODX RS) available. Five equations were selected that provide a surrogate measure of ODX by Klein (Magee equations 1-3), Gage et al., and Tang et al. Although commonly available surrogates for ODX appear to predict high-risk ODX RS, the study was unable to reliably rule out the presence of patients with intermediate-risk disease by ODX.
AHRQ-funded; HS022189.
Citation: Harowicz MR, Robinson TJ, Dinan MA .
Algorithms for prediction of the Oncotype DX recurrence score using clinicopathologic data: a review and comparison using an independent dataset.
Breast Cancer Res Treat 2017 Feb;162(1):1-10. doi: 10.1007/s10549-016-4093-4.
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Keywords: Cancer, Cancer: Breast Cancer, Genetics, Women
Farias AJ, Du XL
Association between out-of-pocket costs, race/ethnicity, and adjuvant endocrine therapy adherence among Medicare patients with breast cancer.
This study aimed to determine whether there are racial/ethnic differences in 1-year adherence to adjuvant endocrine therapy (AET) and whether out-of-pocket costs explain the racial/ethnic disparities in adherence. It concluded that racial/ethnic disparities in AET adherence were largely explained by women's differences in socioeconomic status and out-of-pocket medication costs.
AHRQ-funded; HS018956.
Citation: Farias AJ, Du XL .
Association between out-of-pocket costs, race/ethnicity, and adjuvant endocrine therapy adherence among Medicare patients with breast cancer.
J Clin Oncol 2017 Jan;35(1):86-95.
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Keywords: Cancer: Breast Cancer, Healthcare Costs, Patient Adherence/Compliance, Racial and Ethnic Minorities, Social Determinants of Health
Boland MR, Miotto R, Gao J
Feasibility of feature-based indexing, clustering, and search of clinical trials. A case study of breast cancer trials from ClinicalTrials.gov.
Searching through a large collection of clinical trials using existing technology is a daunting task. This study extracted 1,437 eligibility features from 80 stage III breast cancer clinical trials and found that it is feasible to develop feature-based indexing and clustering methods for clinical trials to identify trials with similar target populations and to improve trial search efficiency.
AHRQ-funded; HS019853.
Citation: Boland MR, Miotto R, Gao J .
Feasibility of feature-based indexing, clustering, and search of clinical trials. A case study of breast cancer trials from ClinicalTrials.gov.
Methods Inf Med. 2013;52(5):382-94. doi: 10.3414/ME12-01-0092..
Keywords: Cancer: Breast Cancer, Data, Education: Patient and Caregiver
Boothe DL, Coplowitz S, Greenwood E
Transforming growth factor beta-1 (TGF-beta1) is a serum biomarker of radiation induced fibrosis in patients treated with intracavitary accelerated partial breast irradiation: preliminary results of a prospective study.
This study examined a relationship between serum transforming growth factor b-1 (TGF-b1) values and radiation-induced fibrosis (RIF). The results suggest that serum TGF-b1 levels before surgery, and during radiation therapy, and after radiation therapy could signal whether a patient is at risk for the development of moderate to severe RIF.
AHRQ-funded; HS016075.
Citation: Boothe DL, Coplowitz S, Greenwood E .
Transforming growth factor beta-1 (TGF-beta1) is a serum biomarker of radiation induced fibrosis in patients treated with intracavitary accelerated partial breast irradiation: preliminary results of a prospective study.
Int J Radiat Oncol Biol Phys 2013 Dec 1;87(5):1030-6. doi: 10.1016/j.ijrobp.2013.08.045..
Keywords: Adverse Events, Cancer, Cancer: Breast Cancer, Risk
Percac-Lima S, Ashburner JM, Bond B
Decreasing disparities in breast cancer screening in refugee women using culturally tailored patient navigation.
The goal of this research was to evaluate whether a patient navigator (PN) program for refugee women decreases disparities in breast cancer screening. Results showed that linguistically and culturally tailored PN decreased disparities over time in breast cancer screening among female refugees from Somalia, the Middle East, and Bosnia.
AHRQ-funded; HS018161.
Citation: Percac-Lima S, Ashburner JM, Bond B .
Decreasing disparities in breast cancer screening in refugee women using culturally tailored patient navigation.
J Gen Intern Med 2013 Nov;28(11):1463-8. doi: 10.1007/s11606-013-2491-4.
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Keywords: Cancer: Breast Cancer, Cultural Competence, Disparities, Racial and Ethnic Minorities, Screening
Nurgalieva ZZ, Franzini L, Morgan RO
Utilization of lymph node dissection, race/ethnicity, and breast cancer outcomes.
This study reports on the impact of nodal surgery utilization on survival among white, African American, Hispanic, and Asian women in a large population of women with breast cancer. It found that the disparities in survival among African American and Hispanic women with breast cancer are not explained by nodal surgery utilization among women with micrometastasis and macrometastasis in sentinel lymph nodes.
AHRQ-funded; HS018956.
Citation: Nurgalieva ZZ, Franzini L, Morgan RO .
Utilization of lymph node dissection, race/ethnicity, and breast cancer outcomes.
Am J Manag Care 2013 Oct;19(10):805-10..
Keywords: Cancer: Breast Cancer, Comparative Effectiveness, Disparities, Patient-Centered Outcomes Research, Racial and Ethnic Minorities
