Table 1.
Descriptive statistics for the basic reproductive numbers (R0), three ozone metrics and weather conditions across 154 Chinese cities.
| Mean | SD | Min | 25th | 50th | 75th | Max | IQR | |
|---|---|---|---|---|---|---|---|---|
| COVID −19 transmissibility | ||||||||
| R0 | 1.4 | 0.3 | 1.0 | 1.1 | 1.3 | 1.5 | 2.5 | 0.4 |
| O3 metrics (µg/m3) | ||||||||
| Daily average | 43.9 | 7.4 | 27.1 | 38.6 | 43.2 | 48.3 | 71.7 | 9.6 |
| 1-h Maximum | 75.1 | 10.5 | 51.6 | 69.2 | 73.1 | 79 | 106.7 | 9.7 |
| 8-h Maximum | 48.3 | 7.7 | 30.1 | 42.4 | 47.8 | 52.9 | 77.1 | 10.5 |
| Weather conditions | ||||||||
| Temperature ( °C) | 4.3 | 8.3 | −22.5 | 0.4 | 6.2 | 9.3 | 19.1 | 8.9 |
| AH (g/m3) | 7.2 | 3.9 | 0.7 | 4.2 | 7.4 | 9.4 | 18.7 | 5.2 |
Abbreviation: R0, basic reproductive number; O3, ozone; AH, absolute humidity; SD, standard deviation; Min, minimum value; Max, maximum value; IQR, interquartile range.