Census Maps

Population estimates are from the 2010 US Census. All other demographic data are from the 2013 5-year American Community Survey.

The maps shown include data from the TFACTS MEGA Reports for all months of 2014 and incorporate demographic information collected from the 2010 US Census and the 2013 5-year American Community Survey. MEGA Report incidence serves as a proxy for child abuse incidence.


For the discrete color scheme, brackets indicate inclusion of values while parentheses indicate exclusion. For example, (10,45] would include the value 45 but not the value 10. Interval cut points correspond to variable quartiles.

TFACTS MEGA Report data

For each client, removal address, as reported within the MEGA Reports, was used to represent the client's location. Clients without removal addresses, those with addresses outside of the state, or those over the age of 21 were excluded from the analysis. If a client had multiple removal addresses, a single address was selected from those that met the afore mentioned criteria. The final dataset used in the analysis contains only one entry per client.

To geocode each address, a valid street address, city, and zip code are required. Each client was matched to their corresponding census information using their GEOid number, a 12-digit number that specifies the 2-digit state code, followed by the 3-digit county code, the 6-digit census tract number, and finally the 1-digit census block number. GEOid numbers were collected using the mapquest.geocoder function found in the R package demogromatics.

Data cleaning yielded the following quantities:

* 49 MEGA reports between January, 2014 and December, 2014.

* Total of 419,893 records from all 49 MEGA reports

* 354 records removed due to missing or out-of-state removal addresses

* 25,688 unique client/removal address combinations

* 8 records removed for over 21 years

* 13,023 unique individuals with valid removal addresses

* 65 failed to geocode correctly

* 12,958 observations used in the analysis


Calculation of children entering state custody

For each geographic area, the number of children entering into state custody per 1,000 is calculated by dividing the number of unique individuals with MEGA Reports in 2014 by the number of people living in the corresponding geographic area, and multiplying by 1,000. Since each MEGA report corresponds to an instance of child abuse, the number of children entering state custody serves as an estimate of the number of individuals 21 or younger, per 1,000 living in a geographic area between the ages of 0-21, who experienced at least one incident of child abuse in 2014.


Regional Classification

MEGA report removal counties were ascertained from the GEOid and grouped into regions according to the following classification. Davidson, Knox, and Shelby counties represent themselves. Regional estimates using census data were also classified into regions from census blocks according to the same classification scheme.

* Northeast: Carter, Greene, Hancock, Hawkins, Johnson, Sullivan, Unicoi, Washington

* Smoky Mountain: Blount, Claiborne, Claiborn, Cocke, Grainger, Hamblen, Jefferson, Sevier

* East: Anderson, Campbell, Loudon, Monroe, Morgan, Roane, Scott, Union

* South Central: Bedford, Coffee, Giles, Hickman, Lawrence, Lewis, Lincoln, Marshall, Maury, Moore, Perry, Wayne, Franklin, Grundy

* Tennessee Valley: Hamilton, Bledsoe, Bradley, McMinn, Marion, Meigs, Polk, Rhea, Sequatchie

* Mid-Cumberland: Cheatham, Montgomery, Robertson, Rutherford, Sumner, Trousdale, Williamson, Wilson

* Upper Cumberland: Cannon, Clay, Cumberland, DeKalb, Fentress, Jackson, Macon, Overton, Pickett, Putnam, Smith, Van Buren, Warren, White

* Northwest: Benton, Carroll, Crockett, Dyer, Gibson, Henry, Lake, Obion, Stewart, Weakley, Dickson, Houston, Humphreys

* Southwest: Chester, Decatur, Fayette, Hardeman, Hardin, Haywood, Henderson, Lauderdale, McNairy, Madison, Tipton

Census data definitions

Census data containing population count estimates were collected from the '2010 SF1 100% Data' section of the 2010 US Census. Data on all other variables were collected from the 2009-2013 American Community Survey (ACS) 5-year estimates. Source tables for variables from the 2010 US Census and 2009-2013 American Community survey were accessed at http://api.census.gov/data/2010/sf1/variables.html and http://api.census.gov/data/2013/acs5/variables.html , respectively. Tables of these estimates are publically available at http://factfinder.census.gov/faces/nav/jsf/pages/index.xhtml.

For each variable, the following list includes the corresponding American Fact Finder (AFF) table/description, source variable codes, and form expressed in the report. For example, the poverty estimates used within the report can be viewed in the American Fact Finder table C17002, titled 'Ratio of income to poverty level in the past 12 months.' Source variable codes used for the variables extracted from the table were 'total number of families' C17002_001E 'Under 0.50' C17002_002E '0.51 to 0.99' C17002_003E .


Estimated 2010 population counts

AFF table: P12

Table description: 'Sex by Age'

Form: count

Variable codes: P0120003 - P0120009; P0120027 - P0120033


Families with income to poverty ratios <1 in last 12 months

AFF table: C17002

Table description: 'Ratio of income to poverty level in the past 12 months'

Form: percentage. The Census Bureau calculates the poverty ratio by dividing a person or family's income by their poverty threshold (ex: a household with an income of $20,000 and corresponding poverty level of $25,000 has a ratio of 0.8). We selected variables corresponding to the total number of families, and poverty ratios 'under 0.50' and '0.51 to 0.99'. 'Percent below poverty level' was calculated by summing the number of families with incomes less than the poverty level as a percent of the total number of families.

Variable codes: C17002_001E, C17002_002E, C17002_003E


Single mother/father households

AFF table: B11003

Table description: 'Family type by presence and age of own children under 18 years'

Form: percentage. Numerator is given by 'Female/male housholder, no husband present: with own children under 18 years old'. Denominator is given by total number of families in the census block.

Variable codes: B11003_001E, B11003_010E, B11003_016E


Civilian labor force unemployed

AFF table: B23025

Table description: 'Employment status for the population 16 years and older'

Form: percentage. Numerator is given by 'Civilian labor force: unemployed'. Denominator is given by 'Total: in civilian labor force'.

Variable codes: B23025_003E, B23025_005E


College educated

AFF table: B15002

Table description: 'Sex by educational attainment for the population 25 years and over'

Form: percentage. Numerator is given by total count of males and females with an Associate degree or higher. This includes Bachelors, Masters, Professional school, and Doctorate. 'Some college' is excluded. Denominator is given by total population ages 25 and older.

Variable codes: B15002_001E, B15002_014E - B15002_018E, B15002_031E - B15002_035E


Population Density

AFF table: B25014

Table description: 'Tenure by Occupants per Room'

Form: percentage. Numerator is given by number of households in each census block with more than 1 occupant per room. Denominator is given by total number of households in the census block. Includes 'owner occupied' and 'renter occupied' properties.

Variable codes: B25014_001E, B25014_005E, B25014_006E, B25014_007E, B25014_011E, B25014_012E, B25014_013E