Table 2.
Syndrome | Type of data | Time lag (days) | Cross-correlation coefficient |
---|---|---|---|
Gastrointestinal | Emergency department visits | − 1 | 0.26 (0.02–0.50) |
ILI | Emergency department visits | − 1 | − 0.38 (− 0.62–0.14) |
Respiratory | Emergency department visits | − 1 | − 0.26 (− 0.50–0.02) |
Heat | Telephone health helpline calls | 0 | 0.43 (0.19–0.67)* |
Respiratory | Laboratory | 1 | 0.37 (0.12–0.61) |
Heat | Temperature | 0 | 0.53 (0.28–0.77)* |
*The maximum correlation is provided with the full range of correlations over a range of days included in Supplementary Table 2