Table 2 Summary statistics of possible systolic blood pressure thresholds in predicting 7-day mortality for the three cohorts
Sensitivity | Specificity | PPV | NPV | LR+ | LR- | FP | FN | FP/FN trade-off* | |
|---|---|---|---|---|---|---|---|---|---|
Emergency department | |||||||||
<90 mmHg | 12 (11-14) | 99 (99-99) | 22 (20-25) | 98 (98-98) | 15 (14-18) | 0.89 (0.87-0.9) | 871 | 1815 | 1 (ref) |
<100 mmHg | 19 (17-20) | 98 (98-98) | 15 (14-16) | 98 (98-99) | 9.4 (8.5-10) | 0.83 (0.81-0.85) | 2193 | 1679 | 10 |
<110 mmHg | 27 (25-29) | 94 (94-95) | 8 (8-9) | 99 (99-99) | 4.8 (4.5-5.2) | 0.78 (0.76-0.8) | 6116 | 1512 | 17 |
<120 mmHg | 36 (33-38) | 87 (87-87) | 5 (5-5) | 99 (99-99) | 2.7 (2.6-2.9) | 0.74 (0.72-0.76) | 14329 | 1331 | 28 |
Ambulance | |||||||||
<90 mmHg | 10 (7-13) | 99 (98-99) | 13 (9-18) | 98 (98-98) | 6.7 (4.8-9.4) | 0.92 (0.88-0.95) | 228 | 321 | 1 (ref) |
<100 mmHg | 18 (14-22) | 97 (96-97) | 11 (8-13) | 98 (98-98) | 5.2 (4.1-6.5) | 0.85 (0.81-0.89) | 540 | 292 | 11 |
<110 mmHg | 27 (22-32) | 92 (92-93) | 7 (6-9) | 98 (98-98) | 3.4 (2.9-4.1) | 0.79 (0.74-0.84) | 1214 | 260 | 16 |
<120 mmHg | 37 (32-43) | 84 (83-84) | 5 (4-6) | 98 (98-99) | 2.3 (2-2.6) | 0.75 (0.69-0.81) | 2540 | 223 | 24 |
MECU | |||||||||
<90 mmHg | 16 (14-19) | 96 (96-97) | 21 (17-24) | 95 (95-95) | 4.3 (3.6-5.2) | 0.87 (0.84-0.9) | 440 | 588 | 1 (ref) |
<100 mmHg | 25 (22-29) | 93 (92-93) | 18 (16-21) | 95 (95-96) | 3.6 (3.1-4.2) | 0.8 (0.77-0.84) | 813 | 524 | 6 |
<110 mmHg | 34 (31-38) | 88 (87-88) | 14 (13-16) | 96 (95-96) | 2.7 (2.5-3.1) | 0.75 (0.71-0.79) | 1443 | 462 | 8 |
<120 mmHg | 43 (40-47) | 79 (78-80) | 11 (10-12) | 96 (95-96) | 2.1 (1.9-2.3) | 0.72 (0.67-0.76) | 2417 | 398 | 10 |