Table 1 Statistical summary of daily air pollutants, meteorological factors and outpatient visits in Fujian, China, 2016–2018
Variable | Mean ± SD | Minimum | Percentile | Maximum | ||
|---|---|---|---|---|---|---|
25th | 50th | 75th | ||||
Total | ||||||
 Respiratory disease | 82 ± 32 | 1 | 60 | 83 | 104 | 180 |
 Upper respiratory disease | 49 ± 20 | 0 | 35 | 49 | 63 | 113 |
 Lower respiratory disease | 16 ± 8 | 0 | 10 | 16 | 22 | 47 |
 Circulatory disease | 174 ± 83 | 0 | 105 | 191 | 231 | 382 |
 NO2 (μg/m3) | 27.38 ± 11.18 | 3.83 | 19.55 | 25.14 | 33.14 | 79.57 |
 O3-8h (μg/m3) | 89.60 ± 33.94 | 16.71 | 64.02 | 87.36 | 112.00 | 208.43 |
 PM2.5 (μg/m3) | 26.07 ± 13.14 | 2.43 | 16.57 | 23.86 | 32.71 | 83.57 |
 PM10 (μg/m3) | 49.68 ± 22.62 | 7.43 | 33.33 | 46.49 | 63.89 | 167.57 |
 Temperature (°C) | 21.54 ± 7.08 | 2.60 | 15.60 | 22.00 | 28.00 | 32.80 |
 Relative humidity (%) | 72 ± 11 | 33 | 65 | 72 | 79 | 99 |
 Air pressure (hpa) | 1010 ± 8 | 983 | 1003 | 1009 | 1016 | 1034 |
Cold season | ||||||
 Respiratory disease | 91 ± 34 | 1 | 70 | 96 | 114 | 166 |
 Upper respiratory disease | 55 ± 22 | 0 | 43 | 56 | 70 | 106 |
 Under respiratory disease | 18 ± 9 | 0 | 12 | 19 | 25 | 46 |
 Circulatory disease | 175 ± 84 | 0 | 108 | 195 | 236 | 367 |
 NO2 (μg/m3) | 33.11 ± 11.55 | 10.43 | 24.57 | 31.72 | 41.34 | 79.57 |
 O3-8h (μg/m3) | 74.21 ± 26.59 | 16.71 | 53.66 | 73.72 | 92.97 | 168.14 |
 PM2.5 (μg/m3) | 30.42 ± 14.44 | 2.43 | 19.86 | 28.14 | 38.50 | 82.14 |
 PM10 (μg/m3) | 52.28 ± 23.48 | 7.43 | 33.72 | 50.79 | 68.54 | 134.14 |
 Temperature (°C) | 14.66 ± 4.11 | 2.60 | 11.60 | 14.30 | 14.30 | 24.70 |
 Relative humidity (%) | 72 ± 12 | 33 | 63 | 73 | 80 | 98 |
 Air pressure (hpa) | 1017 ± 6 | 1001 | 1013 | 1016 | 1021 | 1034 |
Warm season | ||||||
 Respiratory disease | 76 ± 29 | 11 | 56 | 77 | 95 | 180 |
 Upper respiratory disease | 45 ± 18 | 5 | 33 | 44 | 56 | 113 |
 Under respiratory disease | 15 ± 8 | 0 | 10 | 15 | 20 | 47 |
 Circulatory disease | 173 ± 81 | 13 | 103 | 189 | 229 | 382 |
 NO2 (μg/m3) | 23.32 ± 8.92 | 3.83 | 17.74 | 22.00 | 27.20 | 73.29 |
 O3-8h (μg/m3) | 100.48 ± 34.39 | 30.00 | 75.04 | 99.24 | 124.14 | 208.43 |
 PM2.5 (μg/m3) | 22.99 ± 11.17 | 4.86 | 15.14 | 21.00 | 28.86 | 83.57 |
 PM10 (μg/m3) | 47.84 ± 21.82 | 10.29 | 33.04 | 44.14 | 60.03 | 167.57 |
 Temperature (°C) | 26 ± 4 | 14.50 | 23.53 | 27.10 | 27.10 | 32.80 |
 Relative humidity (%) | 72 ± 11 | 41 | 65 | 72 | 79 | 99 |
 Air pressure (hpa) | 1005 ± 6 | 983 | 1001 | 1004 | 1008 | 1022 |
O3concentrations exceeding 100 μg/m3 | ||||||
 Respiratory disease | 82 ± 30 | 12 | 61 | 84 | 102 | 163 |
 Upper respiratory disease | 49 ± 19 | 7 | 36 | 47 | 62 | 103 |
 Lower respiratory disease | 17 ± 8 | 0 | 11 | 17 | 23 | 47 |
 Circulatory disease | 181 ± 81 | 18 | 115.5 | 194.5 | 238.75 | 382 |
 NO2 (μg/m3) | 25.16 ± 7.56 | 10.14 | 20.14 | 23.745 | 28.2825 | 56.14 |
 O3-8h (μg/m3) | 126.36 ± 20.89 | 100.14 | 109.86 | 121.71 | 136.66 | 208.43 |
 PM2.5 (μg/m3) | 29.81 ± 10.97 | 6.43 | 21.74 | 27.86 | 35.57 | 70.43 |
 PM10 (μg/m3) | 59.81 ± 19.55 | 15.29 | 45.895 | 57.43 | 70.86 | 164.14 |
 Temperature (°C) | 24.36 ± 6.46 | 8.5 | 19.75 | 26 | 26 | 32.8 |
 Relative humidity (%) | 66 ± 9 | 41 | 60 | 66 | 72 | 96 |
 Air pressure (hpa) | 1007 ± 7 | 992 | 1002 | 1006 | 1013 | 1031 |