Table 1.
City characteristics. Median, minimum, and maximum values amongst the included cities are displayed for SARS-CoV-2 cases, city demographics and pollution levels.
| City parameter | Min | 1st quartile | Median | Mean | 3rd quartile | Max |
|---|---|---|---|---|---|---|
| Total confirmed cases (#) | 1218 | 5733 | 11,546 | 21,323 | 21,562 | 314,953 |
| Cases per day (#) | 0 | 3 | 16 | 87.3 | 71.0 | 6732 |
| City population sizes (#) | 64,986 | 382,112 | 640,152 | 1,185,579 | 1,127,277 | 5,444,389 |
| Density (# per km2) | 8.8 | 41.6 | 151.4 | 411.0 | 347.7 | 4849.7 |
| Percentage aged >65 yrs. | 8.7 | 14.3 | 17.2 | 17.7 | 20.2 | 27.2 |
| PM2.5 (μg/m3) | 8.1 | 10.5 | 11.8 | 13.5 | 14.5 | 33.4 |