Appendix Table 1.

Sensitivity and Specificity for SaFETy Score Thresholds Between 1 and 10 in the Training Set

Threshold	Sensitivity (95% CI)	Specificity (95% CI)
1	186/189 = 98.4% (95.1%–99.6%)	29/173 = 16.8% (11.7%–23.4%)
2	160/189 = 84.7% (78.5%–89.3%)	77/173 = 44.5% (37.0%–52.2%)
3	132/189 = 69.8% (62.7%–76.2%)	125/173 = 72.3% (64.9%–78.6%)
4	122/189 = 64.6% (57.2%–71.3%)	134/173 = 77.5% (70.4%–83.3%)
5	109/189 = 57.7% (50.3%–64.7%)	140/173 = 80.9% (74.1%–86.3%)
6	74/189 = 39.2% (32.2%–46.5%)	162/173 = 93.6% (88.6%–96.6%)
7	35/189 = 18.5% (13.4%–25.0%)	167/173 = 96.5% (92.3%–98.6%)
8	19/189 = 10.1% (6.3%–15.5%)	171/173 = 98.8% (95.4%–99.8%)
9	15/189 = 7.9% (4.7%–13.0%)	173/173 = 100.0% (97.3%–100.0%)
10	10/189 = 5.3% (2.7%–9.8%)	173/173 = 100.0% (97.3%–100.0%)

SaFETy = Serious fighting, Friend weapon carrying, community Environment, and firearm Threats.