Table 1.
Outputs from selected OLS regression models predicting R0 within global cities (n = 359) and global cities excluding China (n = 274). CI = confidence interval, ΔAIC = change in Akaike Information Criterion when term excluded, LRT = Likelihood ratio test.
| Global analysis |
Global analysis excluding China |
|||||
|---|---|---|---|---|---|---|
| Covariate | Coefficient (95% CI) | ΔAIC | p(LRT) | Coefficient (95% CI) | ΔAIC | p(LRT) |
| Relative humidity (%) | −0.004 (−0.008, 0.000) | 1.49 | 0.062 | −0.003 (−0.007, 0.001) | 0.30 | 0.129 |
| Surface UV radiation (kJ/m2) | −0.005 (−0.007, −0.002) | 15.4 | <0.001 | −0.003 (−0.006, 0.000) | 3.57 | 0.018 |
| Calendar day | – | – | – | 0.004 (−0.001, 0.008) | 0.86 | 0.091 |
| Latitude (°) | −0.003 (−0.005, −0.001) | 4.69 | 0.010 | −0.003 (−0.005, −0.001) | 4.24 | 0.012 |
| Log(elevation (m)) | −0.067 (−0.118, −0.016) | 4.81 | 0.009 | −0.059 (−0.110, −0.007) | 3.24 | 0.022 |
| Log(population) | −0.113 (−0.200, −0.026) | 4.57 | 0.010 | −0.091 (−0.186, 0.005) | 1.63 | 0.057 |
| Log(population density (km−2)) | – | – | – | 0.167 (−0.015, 0.350) | 1.38 | 0.066 |
| Log(GDP per capita (USD)) | – | – | – | 0.160 (−0.038, 0.357) | 0.64 | 0.105 |
| Air pollution (μg/m3) | 0.008 (0.006, 0.009) | 83.6 | <0.001 | 0.006 (0.004, 0.008) | 25.0 | <0.001 |
| Stringency of government response | −0.009 (−0.012, −0.007) | 70.1 | <0.001 | −0.010 (−0.013, −0.007) | 39.5 | <0.001 |