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. Author manuscript; available in PMC: 2011 Jul 21.
Published in final edited form as: Geospat Health. 2008 May;2(2):215–225. doi: 10.4081/gh.2008.245

Table 1.

Unadjusted non-parametric correlation of local West Nile virus case density with local environmental landscape features, housing age, and other human population factors within 4 mile2 grid cells of Cuyahoga County

Variable Rank Correlation P value
Total population    0.042 NS
Population over 65 yr    0.265 < 0.001
Median income    0.182 0.002
Median age of housing    0.131 0.03
Road density    0.390 < 0.001
Parkland density − 0.203 0.001
Percent open/agricultural area − 0.394 < 0.001
Percent urban/suburban areas    0.513 < 0.001
Percent open water − 0.218 < 0.001
Percent shrub/scrub areas − 0.224 < 0.001
Percent forest/wooded − 0.005 NS
Percent non-forested wetland − 0.390 < 0.001
Percent barren land    0.017 NS
Case density 1.00 Comparison