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. Author manuscript; available in PMC: 2022 Sep 1.
Published in final edited form as: Prev Med. 2021 Jun 1;150:106669. doi: 10.1016/j.ypmed.2021.106669

Table 4.

Descriptive statistics of quantitative sample: Reasons for Geographic and Racial Differences in Stroke Study (2006-2017).

Variable Mean/proportion Std. deviation
Cognitive function score 0.015 2.355
Number of parks 3.819 6.086
Businesses per square mile 260.941 658.704
Recreation center kernel density 3e-07 9e-07
Age (at baseline test, in years) 66.995 8.825
Black 0.398 -
Female 0.556 -
Education: less than high school 0.089 -
Education: high school 0.237 -
Education: some college 0.269 -
Education: college degree or higher 0.405 -
Census tract: proportion of housing owner occupied 0.634 0.205
Census tract: proportion non-Hispanic Black 0.425 0.351
Census tract: proportion earning below poverty line 0.188 0.133
Years since baseline test 3.445 3.177
Number of cognitive tests contributed to sample 3.462 1.713

Note. Respondents (n = 21,151) contributed 73,228 observations to the sample and were clustered within 12,669 unique census tracts. Summaries for recreation center kernel density are given in scientific notation, given their scale relative to the other covariates. 53% of respondents contributed between 3 to 5 cognitive tests to the sample. 16% of respondents contributed only 1 test, while 4% of respondents contributed 7 tests. No respondent contributed more than 7 cognitive test the data.