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Fig. 1 | Environmental Health

Fig. 1

From: Ozone and childhood respiratory disease in three US cities: evaluation of effect measure modification by neighborhood socioeconomic status using a Bayesian hierarchical approach

Fig. 1

Study area maps for main analyses. Gray areas represent the ZCTAs included in analyses (≥50 respiratory disease ED visits). Hash mark areas represent excluded ZCTAs (<50 respiratory disease ED visits). a represents the Atlanta study area; b represents the Dallas study area; c represents the St. Louis study area. Abbreviations: ED, Emergency Department; ZCTA, ZIP Code Tabulation Area

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