The TBI Model Systems Neighborhood Socioeconomic Disadvantage Index (TBIMS-NSDI) variable was calculated in 2019 using the first dimension of a principal components analysis of eight census tract-based socioeconomic indicators (Percent Unemployed, Percent Single Parent Led Households, Percent No HS or GED, Percent Bachelor’s Degree or Higher, Percent Below the Poverty Line, Percent of Households that Were on Food Stamps/SNAP, Median Household Income, Median Family Income). This variable contains a value that indicates the neighborhood disadvantage of a census tract. Its value can be negative or positive; positive values indicate more disadvantage.

The specifics of this variable’s creation can be found in Kumar RG, Delgado A, Corrigan JD, Eagye CB, Whiteneck GG, Juengst SB, Callender L, Bogner J, Pinto SM, Rabinowitz AR, Perrin PB, Venkatesan UM, Botticello AL, Lequerica AH, Taylor S, Zafonte RD, Dams-O’Connor K. (2024). The TBI Model Systems Neighborhood Socioeconomic Disadvantage Index (TBIMS-NSDI): Development and Comparison to Individual Socioeconomic Characteristics. J Head Trauma Rehabil. There will be a new TBIMS_NSDI variable every ten years, separate from this one, denoted by the 4-digit year at the end of the variable name.

The zip file below contain the NSDI and its component variables and can be downloaded for use with any dataset that contains unique 11-digit U.S. Census Tracts.

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