Table 3.
Risk thresholds (%) |
N below threshold (%) | N above threshold (%) | Sensitivity (95% CI) |
Negative LR (95% CI) |
Specificity (95% CI) |
Positive LR (95% CI) |
0.1 | 5495 (33.8) | 10 773 (66.2) | 0.97 (0.93 to 0.99) | 0.09 (0.03 to 0.23) | 0.34 (0.33 to 0.35) | 1.5 (1.4 to 1.5) |
0.2 | 8461 (52.0) | 7807 (48.0) | 0.93 (0.87 to 0.96) | 0.14 (0.08 to 0.26) | 0.52 (0.52 to 0.53) | 1.9 (1.9 to 2.1) |
0.25 | 9416 (57.9) | 6852 (42.1) | 0.90 (0.84 to 0.95) | 0.17 (0.10 to 0.28) | 0.58 (0.58 to 0.59) | 2.2 (2.0 to 2.3) |
0.5 | 12 200 (75.0) | 4068 (25.0) | 0.76 (0.67 to 0.83) | 0.32 (0.24 to 0.44) | 0.75 (0.75 to 0.76) | 3.1 (2.8 to 3.4) |
1.0 | 14 224 (87.4) | 2044 (12.6) | 0.59 (0.50 to 0.67) | 0.47 (0.39 to 0.58) | 0.88 (0.87 to 0.88) | 4.8 (4.1 to 5.6) |
2.0 | 15 279 (93.9) | 989 (6.1) | 0.48 (0.39 to 0.57) | 0.55 (0.47 to 0.65) | 0.94 (0.94 to 0.95) | 8.4 (6.9 to 10) |
5 | 15 831 (97.3) | 437 (2.7) | 0.36 (0.37 to 0.45) | 0.65 (0.57 to 0.74) | 0.98 (0.97 to 0.98) | 15 (12 to 19) |
LR, likelihood ratio.