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. 2010 Apr 23;9:20. doi: 10.1186/1476-072X-9-20

Table 2.

Means and standard deviations for connectivity variables in Los Angeles (n = 8542) and San Diego (N = 1942) counties.

Los Angeles San Diego
Variable Mean S.D. Mean S.D.
Link Node Ratio 1.828 0.263 1.627 0.268
Connected Node Ratio 0.863 0.123 0.751 0.133
Intersection Density 47.05 21.72 39.25 18.28
Street Density 11.96 2.853 10.16 3.179
Block Density 37.51 20.49 29.01 19.36
Average Block Length 0.168 0.053 0.181 0.110
Median Block Length 0.160 0.055 0.156 0.089
Alpha* 0.163 0.084 0.113 0.090
Gamma* 0.449 0.056 0.416 0.060

N = 8414 and 1852 for alpha and 8536 and 1911 for gamma in Los Angeles and San Diego counties respectively

Note values for all variables are significantly different between counties (p < 0.0001).