Table 11. Comparison of Data Stream Rankings for Early Warning Surveillance Goal.
| Early Warning of a Health Threat | Final Rankings | Without Geo./Pop. Coverage | Varying the Utility Function | 3 Tiers of Metric Weights | Low Values for Metrics | Equal Weights | Highest Rank | Lowest Rank |
| ED/Hospital Records | 2 | 2 | 1 | 1 | 3 | 1 | 1 | 3 |
| Clinic/Healthcare Provider | 2 | 2 | 1 | 1 | 3 | 1 | 1 | 3 |
| Laboratory Records | 3 | 4 | 2 | 3 | 5 | 3 | 2 | 5 |
| Internet Search Queries | 1 | 1 | 3 | 2 | 1 | 2 | 1 | 3 |
| Official Reports | 9 | 8 | 11 | 7 | 8 | 7 | 7 | 11 |
| Personal Communication | 8 | 7 | 9 | 4 | 7 | 6 | 4 | 9 |
| Social Media | 6 | 5 | 7 | 6 | 4 | 5 | 4 | 7 |
| News Aggregators | 4 | 4 | 5 | 5 | 2 | 4 | 2 | 5 |
| Ambulance/EMT Records | 7 | 6 | 4 | 9 | 6 | 5 | 4 | 9 |
| Help Lines | 5 | 3 | 6 | 8 | 3 | 8 | 3 | 8 |
| Sales | 10 | 9 | 8 | 10 | 9 | 9 | 8 | 10 |
| Employment/School Records | 12 | 12 | 12 | 11 | 11 | 10 | 10 | 12 |
| Police/Fire Department Records | 11 | 10 | 10 | 12 | 10 | 12 | 10 | 12 |
| Financial Records | 12 | 11 | 15 | 12 | 13 | 11 | 11 | 15 |
| Established Databases | 13 | 13 | 14 | 13 | 12 | 8 | 8 | 14 |
| Prediction Markets | 14 | 14 | 13 | 14 | 14 | 13 | 13 | 14 |