Association of Inflammatory and Noninflammatory Breast Cancer with Socioeconomic Characteristics in the Surveillance, Epidemiology, and End Results Database, 2000–2007
- 1 January 2012
- journal article
- research article
- Published by American Association for Cancer Research (AACR) in Cancer Epidemiology, Biomarkers & Prevention
- Vol. 21 (1), 155-165
- https://doi.org/10.1158/1055-9965.epi-11-0833
Abstract
Background: Inflammatory breast cancer (IBC) is a rare and highly aggressive form of primary breast cancer. Little is known about the risk factors for IBC, specifically the association with socioeconomic position (SEP). Methods: The association between breast cancer type (IBC vs. non-IBC) with county-level SEP in the Surveillance, Epidemiology, and End Results database for cases diagnosed from 2000 to 2007 was examined. County-level SEP characteristics included metropolitan versus non-metropolitan residence, percentage below the poverty level, percentage less than high-school graduate, and an index combining the poverty and high-school variables. IBC and non-IBC age-adjusted incidence rates were calculated, stratified on SEP and race/ethnicity. The odds of IBC versus non-IBC given a particular SEP characteristic, adjusting for age and race/ethnicity, was examined through fitting of hierarchical logistic regression models (HLM). Results: Incidence rates for IBC generally increased as SEP decreased, whereas the opposite was found for non-IBC. HLM results showed that low SEP is associated with higher odds of IBC: highest (≥20%) versus lowest (28.76%) versus lowest (≤15.99%) persons less than high-school graduate [OR (95% CI) = 1.25 (1.10–1.42)]; and low SEP as measured by poverty-high school index versus high SEP [OR (95% CI)= 1.26 (1.11–1.44)]. Conclusion: Overall breast cancer has been found to be positively associated with SEP, whereas in this analysis, IBC was associated with decreasing SEP. Impact: Studies focused on understanding the disparity in IBC incidence, as well as interventions to eliminate these differences are needed. Cancer Epidemiol Biomarkers Prev; 21(1); 155–65. ©2011 AACR.Keywords
This publication has 66 references indexed in Scilit:
- Inflammatory breast cancer: high risk of contralateral breast cancer compared to comparably staged non-inflammatory breast cancerBreast Cancer Research and Treatment, 2011
- International expert panel on inflammatory breast cancer: consensus statement for standardized diagnosis and treatmentAnnals Of Oncology, 2010
- Does Rurality Affect Quality of Life Following Treatment for Breast Cancer?The Journal of Rural Health, 2010
- Socioeconomic disparities in breast cancer survival: relation to stage at diagnosis, treatment and raceBMC Cancer, 2009
- Recent trends in breast cancer incidence in US white women by county-level urban/rural and poverty statusBMC Medicine, 2009
- Urban–rural differences in breast cancer incidence by hormone receptor status across 6 years in EgyptBreast Cancer Research and Treatment, 2009
- Analysis of RhoC expression and lymphovascular emboli in inflammatory vs non-inflammatory breast cancers in Egyptian patientsThe Breast, 2009
- Qualitative age interactions (or effect modification) suggest different cancer pathways for early-onset and late-onset breast cancersCancer Causes & Control, 2007
- Inter- and intra-ethnic differences for female breast carcinoma incidence in the continental United States and in the state of HawaiiBreast Cancer Research and Treatment, 2005
- Molecular portraits of breast cancer: tumour subtypes as distinct disease entitiesEuropean Journal of Cancer, 2004