Title: Healthcare access, socioeconomic factors and late-stage cancer diagnosis: an exploratory spatial analysis and public policy implication

Authors: Fahui Wang, Lan Luo, Sara McLafferty

Addresses: Department of Geography and Anthropology, Louisiana State University, Baton Rouge, LA 70803 USA. ' Department of Geography, University of Illinois, Urbana-Champaign, Urbana, IL 61801-3671 USA. ' Department of Geography, University of Illinois, Urbana-Champaign, Urbana, IL 61801-3671 USA

Abstract: Patients diagnosed with late-stage cancer have lower survival rates than those with early-stage cancer. This paper examines possible associations between several risk factors and late-stage diagnosis for four types of cancer in Illinois: breast cancer, prostate cancer, colorectal cancer, and lung cancer. Potential risk factors are composed of spatial factors and nonspatial factors. The spatial factors include accessibility to primary healthcare and distance or travel time to the nearest cancer screening facility. A set of demographic and socioeconomic variables are consolidated into three nonspatial factors by factor analysis. The Bayesian model with convolution priors is utilised to analyse the relationship between the above risk factors and each type of late-stage cancer while controlling for spatial autocorrelation. The results for breast cancer suggest that people living in neighbourhoods with socioeconomic disadvantages and cultural barriers are more likely to be diagnosed at a late stage. In regard to prostate cancer, people in regions with low socioeconomic status are also more likely to be diagnosed at a late stage. Diagnosis of late-stage colorectal or lung cancer is not significantly associated with any of the abovementioned risk factors. The results have important implications in public policy.

Keywords: late-stage cancer; healthcare access; Poisson regression; spatial autocorrelation; Bayesian model; convolution priors; USA; United States; socioeconomic factors; breast cancer; prostate cancer; colorectal cancer; lung cancer; primary healthcare; travel time; cancer screening; demographics; cultural barriers; public policy.

DOI: 10.1504/IJPP.2010.030606

International Journal of Public Policy, 2010 Vol.5 No.2/3, pp.237 - 258

Published online: 26 Dec 2009 *

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