Skip to main content

Table 1 Variable definitions, sources and measures and characteristics of the Virginia localities

From: Spatial analysis of colorectal cancer outcomes and socioeconomic factors in Virginia

Variable Name Variable Type Data Source; details Measure Mean [Minimum, Maximum]
Incidence Outcome State Cancer Profiles 2011–2015 [12]; annual estimate of invasive cancer diagnoses with 95% confidence interval. Age adjusted incidence based on 2000 US standard population. Annual CRC diagnoses per 100,000 population 39.4 (22.7,70.0)
Mortality Outcome State Cancer Profiles 2011–2015 [12]; annual estimate of CRC attributable deaths with 95% confidence interval. Age adjusted incidence based on 2000 US standard population. Annual CRC deaths, per 100,000 population 16.5 (8.2,32.5)
Mortality- incidence ratio (MIR) Outcome CRC mortality rate divided by incidence rate for each locality for which both data points were available Ratio expressed as decimal 0.43 (0.26,1.08)
AA population Independent Racial category in US Census data 2010 [32] Percent of population 18.9 (0.10,79.10)
Rural-urban status Independent US Department of Agriculture Economic Research Service 2013 [33]; Rural Urban Continuum Codes based on urban population within locality and adjacency to other metropolitan areas Ordinal scores 1–9; 1–3 are metropolitan, 4–9 are non-metro 3.72 (1,9)
SES index Independent Appalachian Regional Commission 2017 [34]; composite index of unemployment, per capita income, poverty. Index value based on 100 as US average; lower index indicates higher SES 101.6 (47.2166.7)
CRC screening rate Independent Small Area Estimates 2008–2010 [35]; estimates based on Behavioral Risk Factor Surveillance Survey question on self-reported previous screening. Percent of population 63.1 (33.2,88.8)
PCP density Independent HRSA Area Health Resource Files 2011–2015 [36]; count for each year by locality PCPs per 100,000 population; sum of PCPs for each year, divided by locality population for each year, then multiplied by 100,000 61.9 (0,323.2)
GI density Independent HRSA Area Health Resource Files 2011–2015 [36]; count for each year by locality GIs per 100,000 population; sum of GIs for each year, divided by locality population for each year, then multiplied by 100,000 2.7 (0,43.3)