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Table 2 Contingency table of census tracts, according their spatial relative risks and the presence/absence of TRI sites, stratified by the proportion of LDS (proxy for smoking)

From: Spatio-temporal patterns of bladder cancer incidence in Utah (1973-2004) and their association with the presence of toxic release inventory sites

LDS TRI sites Persistent spatial relative risks
   Cases Controls
   Both genders/Males Both genders/Males
(0.29;0.58] Presence 6/6 6/6
  Absence 71/69 166/170
(0.58;0.88] Presence 2/2 7/8
  Absence 14/8 211/224
Total   93/84 390/408