Table 3.
Empirical results of the associations of air pollutants, AQI, and weather factors with daily confirmed COVID-19 cases from 1 January to 30 March 2020 in the BMR, Thailand.
| Type of correlation coefficients | Parameters | Daily of COVID-19 cases |
|---|---|---|
| Spearman's rank correlation coefficients | CO (μg/m3) | – 0.582* |
| NO (μg/m3) | – 0.062 | |
| NO2 (μg/m3) | – 0.525* | |
| SO2 (μg/m3) | – 0.599* | |
| O3 (μg/m3) | – 0.330* | |
| PM10 (μg/m3) | – 0.506* | |
| PM2.5 (μg/m3) | – 0.460* | |
| Air quality index (AQI) | – 0.458* | |
| Temperature (°C) | 0.431* | |
| Relative humidity (%) | 0.244* | |
| Absolute humidity (g/m3) | 0.453* | |
| Wind speed (m/s) | 0.487* | |
| Rainfall (mm) | – 0.088 | |
| Kendall's rank correlation coefficients | CO (μg/m3) | – 0.445* |
| NO (μg/m3) | – 0.049 | |
| NO2 (μg/m3) | – 0.415* | |
| SO2 (μg/m3) | – 0.473* | |
| O3 (μg/m3) | – 0.230* | |
| PM10 (μg/m3) | – 0.397* | |
| PM2.5 (μg/m3) | – 0.360* | |
| Air quality index (AQI) | – 0.359* | |
| Temperature (°C) | 0.318* | |
| Relative humidity (%) | 0.171* | |
| Absolute humidity (g/m3) | 0.335* | |
| Wind speed (m/s) | 0.381* | |
| Rainfall (mm) | – 0.080 |
* Statistically significant at p < 0.05.