The chart below outlines the various variables/inputs used in each index. Variables are listed in the same row to denote that they are similar; this does not imply that the variables are identical.
More information on these variables can be found on the various index detail pages.
*The FEMA National Risk Index (NRI) contains both CDC SVI and BRIC as variables. Therefore, the table below lists both CDC SVI and BRIC variables in the NRI column.
Demographic
Variables/Inputs
% Persons 65 years of age and older
% Persons under 5 years or 65 years and over
% Population age 65 and older
Pre-retirement age: % Population between 15 to 65 years of age
% Persons 65 years of age and older
--
Pre-retirement age: % Population between 15 to 65 years of age
% Persons 17 years of age or younger
--
--
--
% Persons 17 years of age or younger
--
Median age
--
--
--
% Minority
--
--
--
% Minority
--
% Asian population
--
--
--
--
% African American population
--
--
--
--
% Hispanic population
--
--
--
--
% Native American population
--
--
--
--
Nursing Home Residents per capita
--
--
--
% Persons in group quarters
--
--
--
% Persons in group quarters
% Persons civilian with a disability
--
% Population with a disability
Non-special needs: % Population without sensory, physical, or mental disability
% Persons civilian with a disability
--
Non-special needs: % Population without sensory, physical, or mental disability
--
--
--
Place attachment-not recent immigrants: % Population not foreign-born persons who came to US within previous 5 years
Place attachment-not recent immigrants: % Population not foreign-born persons who came to US within previous 5 years
--
--
--
Place attachment-native born
residents: % Population born in state of current residence
Place attachment-native born
residents: % Population born in state of current residence
% Households with limited English proficiency
% Population speaking English as a second language with limited English proficiency
% Households with limited English proficiency
English language competency: % Population proficient English speakers
% Households with limited English proficiency
--
English language competency: % Population proficient English speakers
% Persons with no high school diploma
% Population with less than a 12th grade education
Educational attainment: % Population without a High School diploma
Educational attainment equality: % Population over 25 with college education or more
% Persons with no high school diploma
--
Educational attainment equality: % Population over 25 with college education or more
Economic
Variables/Inputs
Per capita income
Per capita income
--
--
Per capita income
--
--
Median household Income
--
--
--
--
Income inequality: Gini Index
Race/ethnicity income equality: Gini coefficient (Inverted)
Race/ethnicity income equality: Gini coefficient (Inverted)
% Persons living below 150% poverty
% Persons living in poverty
% Persons living in poverty
--
% Persons living below 150% poverty
--
% of Households spending more than 40% of their income on housing expenses (tract level only)
--
--
--
--
--
--
Gender income equality: Absolute difference between male and female median income divided by annual income (Inverted)
Gender income equality: Absolute difference between male and female median income divided by annual income (Inverted)
--
% Families earning more than $200,000 per year
--
--
% Families earning more than $200,000 per year
--
--
--
Energy Burden: Average Energy Burden (% income), (Inverted)
Energy Burden: Average Energy Burden (% income), (Inverted)
--
% Households receiving Social Security benefits
--
--
--
Household Composition
Variables/Inputs
% Male or female householder, no spouse present, with children under 18
--
% Single-parent households as a function of all families
--
% Male or female householder, no spouse present, with children under 18
--
% Children living in 2-parent families
--
--
--
Crowding (at household level, more people than rooms)
Average number of people per housing unit
--
--
Crowding (at household level, more people than rooms)
--
% Female
--
--
--
--
% Female-headed households
--
--
--
--
% Renter-occupied housing units
--
--
--
--
--
Home ownership: % Owner- occupied housing units
Home ownership: % Owner- occupied housing units
Home Ownership: % Owner- occupied housing units
% Multi-unit structures
--
--
--
% Multi-unit structures
--
Median gross rent
--
--
--
--
Median housing value
--
--
--
% Mobile homes
% Mobile Homes
Mobile Homes: % Mobile homes as a function of total housing
Sturdier housing types: % Housing units not mobile homes
% Mobile homes
--
Sturdier housing types: % Housing units not mobile homes
--
% Unoccupied housing units
--
--
--
--
--
--
Temporary housing availability: % Vacant housing units that are for rent
Temporary housing availability: % Vacant housing units that are for rent
--
--
--
Housing stock construction quality: % Housing units built prior to 1970 or after 2000
Housing stock construction quality: % Housing units built prior to 1970 or after 2000
--
--
Households without a smart phone
--
--
Employment
Variables/Inputs
% Civilian labor force unemployed
% Civilian labor force unemployed
% Civilian labor force unemployed
--
% Civilian labor force unemployed
--
--
--
Employment rate: % Labor force employed
Employment rate:% Labor force employed
--
% Employment in extractive industries (fishing, farming, mining, etc.)
--
Non-dependence on primary/tourism sectors: % Employees not in farming, fishing, forestry, extractive industry, or tourism
Non-dependence on primary/tourism sectors: % Employees not in farming, fishing, forestry, extractive industry, or tourism
--
% Female participation in the labor force
--
--
--
--
--
% Unemployed women in the labor force
--
--
--
% Employment in service occupations
--
--
--
--
--
--
Federal employment: % Labor force employed by federal government
Federal employment: % Labor force employed by federal government
Transportation
Variables/Inputs
No vehicle available
% Housing units with no car available
Mobility: % Households without a vehicle
--
No vehicle available
--
--
--
Transportation Access: % Households with at least one vehicle
Transportation Access: % Households with at least one vehicle
--
--
--
Evacuation routes: Intersection density
Evacuation routes: Intersection density
--
--
--
Industrial re-supply potential: Rail miles per square mile
Industrial re-supply potential: Rail miles per square mile
Community
Variables/Inputs
--
--
Presence of Civic and Social Organizations
Civic Organizations: # Civic organizations per capita
Civic Organizations: # Civic organizations per capita
--
--
Population without Religious Affiliation
Religious Organizations: # Religious organizations per capita
Religious Organizations: # Religious organizations per capita
--
--
--
Disaster Volunteerism: # AmeriCorps volunteers per capita
Disaster Volunteerism: # AmeriCorps volunteers per capita
--
--
% of Inactive Voters (defined differently by state)
--
--
--
--
--
Temporary shelter availability: # Hotels/motels per capita
Temporary shelter availability: # Hotels/motels per capita
--
--
% Population change
Population change over previous 5-year period (Inverted)
Population change over previous 5-year period (Inverted)
--
--
--
Large retail-regional/national geographic distribution: Large retail stores per capita
Large retail-regional/national geographic distribution: Large retail stores per capita
--
--
--
Business size 1: Ratio of large to small businesses
Business size 1: Ratio of large to small businesses
--
--
--
Business size 2: Ratio of employees to establishments
Business size 2: Ratio of employees to establishments
--
--
--
School restoration potential: # Public schools per capita
School restoration potential: # Public schools per capita
Health
Variables/Inputs
--
% Population without health insurance
% Population without health insurance
--
--
--
--
--
Health insurance: % Population under age 65 with health insurance
Health insurance: % Population under age 65 with health insurance
--
--
--
Mental health support: Psychosocial support facilities per capita
Mental health support: Psychosocial support facilities per capita
--
--
Medical professional capacity: Number of health-diagnosing and treating practitioners per 1,000 population
Physician access: Physicians per capita
Physician access: Physicians per capita
--
--
--
Medical care capacity: # Hospital beds per capita
Medical care capacity: # Hospital beds per capita
--
% Hospitals per capita
Hospital capacity: Number of hospitals per 10,000 people
--
--
--
--
--
Food provisioning capacity: Food security rate (Inverted)
Food provisioning capacity: Food security rate (Inverted)
--
--
--
Local food suppliers: Farms marketing products through Community Supported Agriculture per capita
Local food suppliers: Farms marketing products through Community Supported Agriculture per capita
Government/
Infrastructure
Variables/Inputs
--
--
--
Mitigation spending: 10-year average per capita spending for mitigation projects
Mitigation spending: 10-year average per capita spending for mitigation projects
--
--
--
Communication capacity: % Households with telephone service available
Communication capacity: % Households with telephone service available
--
--
--
High-speed internet infrastructure: % Population with access to broadband internet service
High-speed internet infrastructure: % Population with access to broadband internet service
--
--
--
Flood insurance coverage: % Housing units covered by National Flood Insurance Program
Flood insurance coverage: % Housing units covered by National Flood Insurance Program
--
--
--
Performance regimes-state capital: Distance from county seat to state capital (Inverted)
Performance regimes-state capital: Distance from county seat to state capital (Inverted)
--
--
--
Performance regimes-nearest metro area: Distance from county seat to nearest county seat within a Metropolitan Statistical Area (Inverted)
Performance regimes-nearest metro area: Distance from county seat to nearest county seat within a Metropolitan Statistical Area (Inverted)
--
--
--
Political and jurisdictional fragmentation: # Governments and special districts per 10,000 persons (Inverted)
Political and jurisdictional fragmentation: # Governments and special districts per 10,000 persons (Inverted)
--
--
--
Political engagement: % Voting age population participating in recent election
Political engagement: % Voting age population participating in recent election
--
--
--
Disaster aid experience: # Presidential Disaster Declarations divided by # of loss-causing hazard events for 10-year period
Disaster aid experience: # Presidential Disaster Declarations divided by # of loss-causing hazard events for 10-year period
--
--
--
Local disaster training: % Population in communities covered by Citizen Corps programs
Local disaster training: % Population in communities covered by Citizen Corps programs
--
--
--
Nuclear plant accident planning: % Population within 10 miles of nuclear power plant
Nuclear plant accident planning: % Population within 10 miles of nuclear power plant
--
--
--
Crop insurance coverage: # Crop insurance policies per square mile
Crop insurance coverage: # Crop insurance policies per square mile
Environmental/
Energy
Variables/Inputs
--
--
--
Natural flood buffers: % Land in wetlands
Natural flood buffers: % Land in wetlands
--
--
--
Efficient energy use: Megawatt hours per energy consumer (Inverted)
Efficient energy use: Megawatt hours per energy consumer (Inverted)
--
--
--
Pervious surfaces: Average percent perviousness
Pervious surfaces: Average percent perviousness
--
--
--
Efficient water use: Water Supply Stress Index (Inverted)
Efficient water use: Water Supply Stress Index (Inverted)
National Alliance for Public Safety GIS Foundation