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Table 3 Summary of extreme heat exposure estimated by logic regression and their short-term associations with warm-season emergency department visits in Atlanta, 1993 to 2012. Relative risk estimates and 95% confidence intervals (CI) were from time-series models adjusting for truncated continuous temperature. Within each outcome, each row of the extreme heat exposure corresponds to an “or” statement derived from the logic regression tree. “Not” statement is indicated by a superscript c

From: Using logic regression to characterize extreme heat exposures and their health associations: a time-series study of emergency department visits in Atlanta

ED Visit Outcome Heat Metric and Quantile Extreme Heat Exposure lag0 lag1 lag2 lag3 Frequency (days) Relative Risk (95% CI)
HEAT ATMN95 (lag0 and lag1) Y Y    237 1.400 (1.269, 1.544)
OR (lag1 and lag3)   Y   Y   
FLEL ATMN95 lag1   Y    335 1.030 (1.016, 1.045)
RENAL ATMN95 (lag0 and lag3) Y    Y 255 1.025 (1.011, 1.039)
OR (lag2C and lag3)    N Y   
ARF ATMN95 lag0 and lag1 Y Y    190 1.052 (1.021, 1.085)
STK TMX98 lag0 and lag1 and lag2C and lag3 Y Y N Y 5 1.257 (1.061, 1.477)
CIRC ATMX95 lag1   Y    363 0.996 (0.987, 1.004)
HT ATMX95 lag0 and lag1 and lag3C Y Y   N 128 0.988 (0.977, 0.999)
   OR (lag1 and lag2 and lag3C)   Y Y N   
IHD TMN99 lag0 Y     63 1.013 (0.986, 1.041)
MI TMN99 lag0 Y     63 1.044 (0.964, 1.131)
CHF ATMN98 lag0 Y     146 0.976 (0.947, 1.007)
DIA TMN95 lag2    Y   238 1.009 (0.996, 1.021)
INTERN ATMN95 lag3     Y 335 1.008 (1.002, 1.015)
  1. HEAT heat illness, STK ischemic stroke, ARF Acute renal failure, RENAL all renal disease, FLEL Fluid and electrolyte imbalance, CIRC all circulatory system disease, CHF Congestive heart failure, IHD Ischemic heart disease, MI Myocardial infarction, DIA Diabetes, HT Hypertension, ITERN all internal causes)