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Table 1 Daily asthma HAs, ambient O3 concentrations, pollen counts, and meteorological variables in Dallas, Houston, and Austin, Texas, from 2003 to 2011

From: Ambient ozone and asthma hospital admissions in Texas: a time-series analysis

Variable name N of days with data Mean SD Minimum 10th Percentile 25th Percentile Median 75th Percentile 90th Percentile Maximum
Daily asthma HAs, all ages (N) 9861 7.6 5.1 0 2 3 7 11 15 32
Daily asthma HAs, 5–14 years (N) 9861 1.7 2.0 0 0 0 1 3 4 17
Daily asthma HAs, 15–64 years (N) 9861 4.2 3.0 0 1 2 4 6 8 19
Daily asthma HAs, 65+ years (N) 9861 1.7 1.6 0 0 0 1 3 4 12
Daily 8-h maximum O3 (ppb) 9839 41.8 14.5 2.0 24.9 31.3 39.7 51.3 62.3 107.0
Daily total pollen counts (N) 9861 283.5 1007.6 0 0 3 26 163 664 30,961
Temperature (° F) 9840 68.1 14.3 16.6 47.2 57.9 70.3 80.1 84.6 97.7
Dew point temperature (° F) 9845 55.1 15.4 6 31.6 43.5 59.5 68.2 72 76.8
  1. HA hospital admission, ppb parts per billion, SD standard deviation, O 3  ozone