Research Article
Rainfall-Associated Bronchospasm Epidemics: The Epidemiological Effects of Air Pollutants and Weather Variables
Table 2
Comparing the levels of air pollutants and climate factors during the epidemic and nonepidemic periods in Ahvaz from 2011 to 2015.
| | Variable | Period | Mean | SD | | value |
| | O3 (ppm) | Epidemic | 32.4356 | 26.5714 | | 0.001 | | Nonepidemic | 26.5714 | 8.67588 | | PM10 (µ g/m3) | Epidemic | 170.660 | 250.3346 | | 0.034 | | Nonepidemic | 228.906 | 384.5480 | | NO (ppm) | Epidemic | 29.2710 | 22.67823 | | <0.001 | | Nonepidemic | 44.1286 | 46.19925 | | NO2 (ppm) | Epidemic | 27.7016 | 17.01837 | | <0.001 | | Nonepidemic | 39.3536 | 24.76065 | | NOx (ppm) | Epidemic | 53.2486 | 37.36753 | | <0.001 | | Nonepidemic | 80.4071 | 63.98548 | | CO (ppm) | Epidemic | 1025.5676 | 839.06828 | | 0.124 | | Nonepidemic | 930.6324 | 604.64199 | | SO2 (ppm) | Epidemic | 17.7463 | 8.34030 | | 0.066 | | Nonepidemic | 16.2249 | 11.10837 | | Temperature (°C) | Epidemic | 19.250 | 3.8260 | | 0.055 | | Nonepidemic | 17.200 | 2.6142 | | Relative humidity (%) | Epidemic | 58.86 | 9.591 | | 0.041 | | Nonepidemic | 55.86 | 8.328 | | Total rainfall (mm) | Epidemic | 35.329 | 34.2287 | | <0.001 | | Nonepidemic | 23.407 | 22.7236 | | Total evaporation (mm) | Epidemic | 104.429 | 40.8523 | | <0.001 | | Nonepidemic | 119.286 | 36.0956 | | Wind speed (m/s) | Epidemic | 12.50 | 9.452 | | 0.102 | | Nonepidemic | 13.57 | 6.745 |
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