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Table 8 Cell counts from a hypothetical case-control study of the association between distance to the nearest highway and coronary heart disease mortality

From: Accuracy of commercial geocoding: assessment and implications

Distance

Case

Non-Case

< 100 m

a* = 88

b* = 108

≥ 100 m

c* = 137

d* = 294

  1. OR* = (a* × d*) ÷ (b* × c*) = 1.8