Characteristics of analyzed geopolitical areas (n = 144)
| Variables | Median or n | IQR or % |
|---|---|---|
| No. of cases | 558 | 221–1419 |
| Case count (per 1 000 000 inhabitants) | 87.6 | 31.4–193.7 |
| Rate ratio | 3.56 | 2.41–4.66 |
| Latitude (degrees) | 38.4 | 21.8–44.6 |
| Temperature (°C) | 12.8 | 7.3–21.2 |
| Relative humidity (%) | 69.0 | 60.3–76.6 |
| Absolute humidity (g/m3) | 7.1 | 5.2–10.8 |
| Altitude (m) | 82.5 | 16.0–274.0 |
| Passenger flights (passengers/capita/yr) | 2.3 | 1.0–4.7 |
| Urban density (1000 inhabitants/km2) | 3.6 | 1.8–6.2 |
| Population (1 000 000 inhabitants) | 7.1 | 3.1–20.6 |
| Percentage of inhabitants aged 65 yr or older | 14.0 | 8.3–17.2 |
| Life expectancy at birth, yr | 79 | 76–81 |
| GDP (1000 USD/inhabitant) | 40.1 | 8.4–56.3 |
| Health expenditure as percentage of GDP | 9.2 | 6.3–13.5 |
| Infectious Disease Vulnerability Index | 0.87 | 0.64–0.92 |
| Any public health intervention | 38 | 26.4% |
| Restrictions of mass gatherings | 24 | 16.7% |
| Social distancing | 10 | 6.9% |
| School closures | 25 | 17.4% |
| No. of public health interventions | ||
| 0 | 106 | 73.6% |
| 1 | 24 | 16.7% |
| 2 or 3 | 14 | 9.7% |
| Global region | ||
| Asia | 30 | 20.8% |
| Oceania | 6 | 4.2% |
| Europe | 36 | 25.0% |
| Africa | 10 | 6.9% |
| Americas | 62 | 43.1% |
| Closest distance to established epidemic (1000 km) | 4.3 | 1.3–8.0 |
Note: GDP = gross domestic product, IQR = interquartile rage, USD = United States dollars.