Table 3.
30-day mortality | Cut-off | Sensitivity | Specificity | PPV | NPV | |
---|---|---|---|---|---|---|
CRB-65 | ||||||
0 | 1/376 (0) | ≥0 | 100 | 0 | 7 | NA |
1 | 18/471 (4) | ≥1† | 99 | 34 | 10 | 100 |
2 | 35/247 (14) | ≥2 | 76 | 76 | 19 | 98 |
3 | 24/74 (32) | ≥3 | 32 | 95 | 33 | 95 |
4 | 2/4 (50) | 4 | 2 | 100 | 50 | 93 |
DS CRB-65 | ||||||
0 | 0/295 (0) | ≥0 | 100 | 0 | 7 | NA |
1 | 2/301 (1) | ≥1 | 100 | 27 | 9 | 100 |
2 | 12/239 (5) | ≥2 | 98 | 54 | 14 | 100 |
3 | 19/195 (10) | ≥3 | 82 | 75 | 20 | 98 |
4 | 30/106 (28) | ≥4 | 59 | 91 | 33 | 97 |
5 | 16/34 (47) | ≥5 | 21 | 98 | 47 | 94 |
6 | 1/2 (50) | 6 | 1 | 100 | 50 | 93 |
*Data presented as number total (%).
†Cut-off point accepted as threshold to define high-risk groups according to original study design.9
CRB-65, PPV, positive predictive value; NPV, negative predictive value.