Statistical analysis. We used the cancer patient data
from the two data sources to create two types of CAs. We
first used the state cancer registry (VCR) data to create a CA
map for diagnosis at MCC during 2009–2011. We then used
the VCUHS billing data (MCC data) to create CA maps for
diagnosis or treatment at MCC during 2009–2011 and during
2009–2012. The first diagnosis/treatment CA analysis was
limited in time (2009–2011) to correspond with the temporal
range of VCR data, and the second diagnosis/treatment
CA analysis (2009–2012) was intended to identify any change
over time in the CA. For each patient dataset, we aggregated
the data spatially to the county level to facilitate models with
population subgroups based on patient demographics. CAs
based on units smaller than a county were not of interest for
the research presented here.