Table 3. Event-Level Sensitivity and Positive Predictive Value of the Gun Violence Archive by Year and City, 2015-2020.
| Variable | Year | |||||
|---|---|---|---|---|---|---|
| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | |
| Sensitivity, % | ||||||
| Overall | 72.1 | 68.8 | 76.6 | 86.5 | 90.2 | 91.7 |
| Philadelphia, Pennsylvania | 47.3 | 50.3 | 49.2 | 93.4 | 96.6 | 99.5 |
| New York, New York | 55.3 | 51.9 | 59.2 | 58.2 | 82.1 | 84.8 |
| Chicago, Illinois | 92.2 | 80.9 | 94.2 | 94.9 | 93.5 | 95.7 |
| Cincinnati, Ohio | 60.5 | 52.0 | 55.9 | 60.1 | 63.2 | 50.2 |
| Positive predictive value, % | ||||||
| Overall | 98.9 | 99.0 | 98.8 | 98.9 | 98.7 | 99.6 |
| Philadelphia, Pennsylvania | 99.4 | 99.5 | 99.8 | 99.7 | 99.8 | 100.0 |
| New York, New York | 99.2 | 97.0 | 96.5 | 97.1 | 98.8 | 99.5 |
| Chicago, Illinois | 99.9 | 100.0 | 100.0 | 100.0 | 99.3 | 99.9 |
| Cincinnati, Ohio | 88.8 | 88.7 | 88.1 | 85.2 | 87.5 | 92.2 |