Table 1.
Univariate statistics for key variables.
| Variable | Valid N | Mean | Median | SD |
| Proportion mentally disabled, 2000a | 3136 | .048 | .046 | .012 |
| Poor mental health daysb | 3014 | 3.804 | 3.773 | .466 |
| Frequent mental distress (% frequent)b | 3014 | 11.592 | 11.486 | 1.502 |
| Suicide rate, smoothed for 2008–2014c | 3136 | 12.501 | 12.053 | 3.535 |
| Geographic isolation indexd | 3137 | 5.211 | 4.969 | 1.678 |
| Social isolation indexa | 3014 | .007 | .026 | .381 |
| Index of county socio-economic statusa | 3137 | .577 | .534 | .639 |
| Income inequality indexb | 3014 | 4.763 | 4.702 | .767 |
| Mean elevation in feete | 3137 | 851.091 | 628.478 | 1155.650 |
| Mental health providersb | 3000 | 216.519 | 194.197 | 143.059 |
| Percent white (non-Hispanic)a | 3014 | 17.373 | 10.217 | 17.112 |
| Proportion living out of county 5 yrs earlier a | 3136 | .212 | .205 | .074 |
| Residential white/non-white segregation indexa | 3000 | 37.832 | 35.836 | 11.727 |
| Instruments | ||||
| Air pollution particulate matterb | 2993 | 10.026 | 9.900 | 1.916 |
| Proportion county that is watera | 3136 | .102 | .029 | .157 |
| Proportion driving alone to workb | 3014 | 76.607 | 79.459 | 11.926 |
NOTES: Weighted by relative county population.
U.S. Census (2000). STF-3 Datafile. Downloaded from “FTP Download” https://www.census.gov/census2000/sumfile3.html.
Robert Wood Johnson Foundation. (2018). County Health Rankings and Roadmaps. State Rankings Data & Reports. Downloaded fromwww.countyhealthrankings.org/explore-health-rankings/rankings-data-documentation.
Center for Disease Control. WISQARS (2008–2014), Fatal Injury Mapping. Downloaded from: http://wisqars.cdc.gov:8443/cdcMapFramework.
Doogan, N.J., Roberts, M.E., Tanenbaum, E.R., Mumford, E.A., & Stillman, F.A. (2017). Validation of a New Geographic Isolation Scale and Urban-Rural Continuum. (2018, in press). Social Science & Medicine, Data file provided by N.J. Doogan.
United States Board on Geographic Names. (2018). States, Territories, Associated Areas of the United States. Datafile: NationalFile_20180801.zip, downloaded from https://geoname.usgs.gov/domestic/download_data.htm.
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