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Table 1 Descriptive statistics for mean and range of meteorological variables, mortality and ED visits during the 2011 heat wave and summer in Harris County, Texas

From: Impact of the 2011 heat wave on mortality and emergency department visits in Houston, Texas

Variable’s description Unit 2011 Heat-wave period Reference perioda Differences 2011 Summer periodb Reference periodc Differences
Daily minimum temperature °C 26.3 (23.9, 27.8) 24.9 (22.2, 28.3) 1.4 25.3 (21.1, 28.3) 24.5 (17.8, 28.3) 0.9
Daily mean temperature °C 32.3 (29.4, 34.7) 29.7 (25.0, 32.8) 2.5 30.9 (25.0, 34.7) 29.2 (24.4, 33.1) 1.7
Daily maximum temperature °C 38.2 (34.4, 42.2) 34.5 (27.2, 38.3) 3.7 36.5 (28.9, 42.2) 34.0 (27.2, 39.4) 2.5
Daily all-cause mortality counts Counts 52 (40, 67) 51 (32, 68) 1 52 (32, 67) 51 (32, 74) 2
Daily all-cause mortality counts among person less than 6 years old Counts 1 (0, 4) 1 (0, 4) 0 1 (0, 4) 1 (0, 4) 0
Daily all-cause mortality counts among person between 6 and 65 years old Counts 16 (10, 26) 16 (6, 30) 0 16 (7, 26) 17 (6, 30) 0
Daily all-cause mortality counts among person above 65 years old Counts 35 (25, 47) 34 (22, 50) 1 35 (18, 47) 33 (18, 59) 2
Daily counts of all-cause ED visits Counts 2064 (1795, 2406) 1786 (1476, 2110) 278 2039 (1795, 2406) 1795 (1476, 2199) 244
Daily counts of all-cause ED visits among person less than 6 years old Counts 303 (248, 404) 271 (202, 425) 32 311 (239, 404) 284 (202, 449) 27
Daily counts of all-cause ED visits among person between 6 and 65 years old Counts 1456 (1242, 1712) 1272 (1058, 1527) 184 1422 (1226, 1712) 1265 (1016, 1621) 157
Daily counts of all-cause ED visits among person above 65 years old Counts 305 (236, 351) 243 (188, 302) 63 306 (236, 366) 246 (85, 329) 60
  1. a2–30 August during 2007–2010; b1 June to 31 August 2011; c1 June to 31 August during 2007–2010.