Spatial Access to Health Care Services and Disparities in Colorectal Cancer Stage at Diagnosis in Texas

Early diagnosis of colorectal cancer (CRC) is important for improving the survival rate of the disease. Disparities in CRC diagnosis among different population groups have persisted in the United States. This study examines whether spatial access to medical services contributes to disparities of late-stage diagnosis of CRC in Texas. Analysis results suggest that there are significant disparities in late-stage CRC diagnosis by race/ethnicity, socioeconomic status, and geographic location in Texas. It is concluded that spatial access to primary care is associated with CRC stage at diagnosis, but not with racial/ethnic and socioeconomic disparities.

[1]  E. PeñaydelaPeña,et al.  [Cancer of the rectum]. , 1955, Revista de sanidad militar.

[2]  J. Kalbfleisch,et al.  Between- and within-cluster covariate effects in the analysis of clustered data. , 1998, Biometrics.

[3]  Xiao-Li Meng,et al.  Disparities in defining disparities: Statistical conceptual frameworks , 2008, Statistics in medicine.

[4]  D. Mackinnon,et al.  Equivalence of the Mediation, Confounding and Suppression Effect , 2000, Prevention Science.

[5]  L. Clegg,et al.  Impact of socioeconomic status on cancer incidence and stage at diagnosis: selected findings from the surveillance, epidemiology, and end results: National Longitudinal Mortality Study , 2008, Cancer Causes & Control.

[6]  A. Diez-Roux Multilevel analysis in public health research. , 2000, Annual review of public health.

[7]  Wei Luo,et al.  Using a GIS-based floating catchment method to assess areas with shortage of physicians. , 2004, Health & place.

[8]  P. Lee,et al.  Health system reform and the generalist physician , 1995, Academic medicine : journal of the Association of American Medical Colleges.

[9]  K. Askland,et al.  Cancer of the colorectum in Maine, 1995-1998: determinants of stage at diagnosis in a rural state. , 2007, The Journal of rural health : official journal of the American Rural Health Association and the National Rural Health Care Association.

[10]  M Kulldorff,et al.  Evaluation of spatial filters to create smoothed maps of health data. , 2000, Statistics in medicine.

[11]  R. Cooper,et al.  Seeking a balanced physician workforce for the 21st century. , 1994, JAMA.

[12]  M. Banerjee,et al.  Race, socioeconomic status and stage at diagnosis for five common malignancies , 2003, Cancer Causes & Control.

[13]  D. Mackinnon Introduction to Statistical Mediation Analysis , 2008 .

[14]  M. Coleman,et al.  Cancer survival in Kentucky and health insurance coverage. , 2003, Archives of internal medicine.

[15]  Xiaocheng Wu,et al.  Associations of subsite‐specific colorectal cancer incidence rates and stage of disease at diagnosis with county‐level poverty, by race and sex , 2006, Cancer.

[16]  I. Kodner,et al.  Colorectal cancer: risk factors and recommendations for early detection. , 1999, American family physician.

[17]  Neng Wan,et al.  A relative spatial access assessment approach for analyzing potential spatial access to colorectal cancer services in Texas , 2012 .

[18]  Jarvis T. Chen,et al.  Geocoding and monitoring of US socioeconomic inequalities in mortality and cancer incidence: does the choice of area-based measure and geographic level matter?: the Public Health Disparities Geocoding Project. , 2002, American journal of epidemiology.

[19]  Qiang Cai,et al.  Validation tests of an improved kernel density estimation method for identifying disease clusters , 2012, J. Geogr. Syst..

[20]  J. Mandelblatt,et al.  The late-stage diagnosis of colorectal cancer: demographic and socioeconomic factors. , 1996, American journal of public health.

[21]  C. Morgan Cancer of the rectum. , 1951, Annals of the Royal College of Surgeons of England.

[22]  Fahui Wang,et al.  Late-Stage Breast Cancer Diagnosis and Health Care Access in Illinois , 2008, The Professional geographer : the journal of the Association of American Geographers.

[23]  Matthew Richard McGrail,et al.  Measuring spatial accessibility to primary care in rural areas: Improving the effectiveness of the two-step floating catchment area method , 2009 .

[24]  Fahui Wang,et al.  Assessing spatial and nonspatial factors for healthcare access: towards an integrated approach to defining health professional shortage areas. , 2005, Health & place.

[25]  A. Nattinger,et al.  Colorectal cancer screening behavior and health insurance status (United States) , 2005, Cancer Causes & Control.

[26]  Yi Qi,et al.  An enhanced two-step floating catchment area (E2SFCA) method for measuring spatial accessibility to primary care physicians. , 2009, Health & place.

[27]  Lu Wang,et al.  Immigration, ethnicity, and accessibility to culturally diverse family physicians. , 2007, Health & place.

[28]  R. C. Lee,et al.  Current approaches to shortage area designation. , 1991, The Journal of rural health : official journal of the American Rural Health Association and the National Rural Health Care Association.

[29]  F. Shepherd,et al.  Influence of sex on toxicity and treatment outcome in small-cell lung cancer. , 2005, Journal of clinical oncology : official journal of the American Society of Clinical Oncology.

[30]  C. Gupta,et al.  Endoscopic Ultrasound in Esophageal Cancer Staging , 2006, The American Journal of Gastroenterology.

[31]  Kevin A. Henry,et al.  Colorectal cancer stage at diagnosis and area socioeconomic characteristics in New Jersey. , 2009, Health & place.

[32]  P. Albert,et al.  Models for longitudinal data: a generalized estimating equation approach. , 1988, Biometrics.

[33]  M. Guagliardo,et al.  International Journal of Health Geographics Open Access Spatial Accessibility of Primary Care: Concepts, Methods and Challenges , 2022 .

[34]  Bin Huang,et al.  Does distance matter? Distance to mammography facilities and stage at diagnosis of breast cancer in Kentucky. , 2009, The Journal of rural health : official journal of the American Rural Health Association and the National Rural Health Care Association.

[35]  Sharan Campleman,et al.  Colorectal cancer stage at diagnosis by socioeconomic and urban/rural status in California, 1988–2000 , 2006, Cancer.

[36]  L. Hutchins,et al.  Racial differences in the outcome of patients with colorectal carcinoma , 2003, Cancer.

[37]  G. Rushton,et al.  Exploratory spatial analysis of birth defect rates in an urban population. , 1996, Statistics in medicine.

[38]  Purushottam W. Laud,et al.  Disparities in colon cancer screening in the Medicare population. , 2007, Archives of internal medicine.

[39]  E. Ellerbeck,et al.  Disparities in colorectal cancer screening: a guideline-based analysis of adherence. , 2006, Ethnicity & disease.

[40]  M. Saif,et al.  Disparities in colorectal cancer in African-Americans vs Whites: before and after diagnosis. , 2009, World journal of gastroenterology.

[41]  P. Diggle Analysis of Longitudinal Data , 1995 .