Table 1.
Spearman correlation coefficients of 16 features with the incidence of COVID-19 at one-week lag in 202 countries*
| Features | Daily_AVG | Daily_MAX | Label_AVG | Label_MAX |
|---|---|---|---|---|
| Coronavirus |
0.59 |
0.88 |
0.78 |
0.93 |
| Pneumonia |
0.15 |
0.80 |
0.31 |
0.91 |
| Cough |
0.09 |
0.72 |
0.23 |
0.91 |
| Fever |
0.16 |
0.80 |
0.31 |
0.92 |
| Nasal congestion |
0.09 |
0.69 |
0.22 |
0.88 |
| Rhinorrhea |
0.16 |
0.76 |
0.35 |
0.92 |
| Diarrhea |
0.01 |
0.70 |
0.02 |
0.82 |
| Fatigue |
-0.03 |
0.52 |
-0.01 |
0.89 |
| Coronavirus_RE |
0.38 |
0.75 |
0.60 |
0.90 |
| Pneumonia_RE |
0.13 |
0.75 |
-0.16 |
0.77 |
| Cough_RE |
0.09 |
0.68 |
0.20 |
0.87 |
| Fever_RE |
0.04 |
0.47 |
0.27 |
0.59 |
| Nasal congestion_RE |
-0.06 |
0.43 |
-0.07 |
0.85 |
| Rhinorrhea_RE |
0.01 |
0.45 |
0.01 |
0.78 |
| Diarrhea_RE |
-0.04 |
0.29 |
0.23 |
0.88 |
| Fatigue_RE | -0.12 | 0.27 | -0.03 | 0.75 |
*Daily_AVG and Daily_MAX: the average and maximum Spearman correlation coefficient of Google search volume data of each feature and daily new confirmed cases at one week behind in 202 countries; Label_AVG and Label_MAX: the average and maximum Spearman correlation coefficient of the average weekly Google search volume data of each feature and the weekly epidemic alert level one week behind in 202 countries.