| | | | Sensitivity | CI | Specificity | CI | NPV | CI | PPV | CI |
| | Blunt head injury | 139/307 | 47.7 | (32.5, 63.3) | 55.1 | (48.9, 61.3) | 86.3 | (80.2, 91.1) | 15.1 | (9.6, 22.5) | | Dangerous mechanism | 105/285 | 33.3 | (19.6, 49.6) | 62.6 | (56.1, 68.7) | 84.4 | (78.3, 89.4) | 13.3 | (7.5, 21.4) | | Vomiting | 23/318 | 8.9 | (2.5, 21.2) | 93 | (89.4, 95.8) | 86.1 | (81.6, 89.3) | 17.4 | (5.0, 38.7) | | Coagulopathy | 36/280 | 8.3 | (1.8, 22.5) | 86.5 | (81.5, 90.5) | 86.5 | (81.5, 90.5) | 8.3 | (1.8, 22.5) | | Skull fracture | 21/319 | 11.6 | (3.8, 24.6) | 94.2 | (90.7, 96.64) | 86.9 | (82.6, 90.5) | 23.8 | (8.2, 47.2) | | Scalp hematoma | 81/319 | 26 | (14.2, 41.1) | 74.7 | (69.1, 79.8) | 85.7 | (80.6, 89.9) | 14.8 | (7.9, 24.5) | | Neuro deficit | 102/313 | 68.9 | (53.4, 81.8) | 73.5 | (67.8, 78.7) | 93.4 | (89.1, 96.3) | 30.4 | (21.7, 40.3) | | ALOC | 134/316 | 67.4 | (52.0, 80.5) | 61.9 | (55.8, 67.7) | 91.8 | (86.8, 95.3) | 23.1 | (16.3, 31.2) | | Abnormal behavior | 100/314 | 53.3 | (37.9, 68.3) | 71.8 | (66.0, 77.1) | 90.2 | (85.4, 93.8) | 24 | (16.0, 33.6) | | No spontaneous eye opening | 61/316 | 34.1 | (20.5, 49.9) | 83.1 | (78.1, 87.3) | 88.6 | (88.1, 92.3) | 24.6 | (14.5, 37.3) | | Not oriented | 189/305 | 65.1 | (49.1, 79.0) | 66.4 | (60.3, 72.1) | 92.1 | (87.3, 95.5) | 24.1 | (16.7, 33.0) | | Not following commands | 76/310 | 43.2 | (28.34, 59.0) | 78.6 | (73.2, 83.4) | 89.3 | (84.6, 93.0) | 25 | (15.8, 36.3) | | Amnestic | 28/224 | 18.5 | (6.3, 38.1) | 88.3 | (83.0, 92.5) | 88.8 | (83.5, 92.8) | 17.9 | (6.1, 36.9) | | Combined criteria | 271/322 | 95.7 | (85.5, 99.5) | 17.8 | (13.5, 22.9) | 96.1 | (86.5, 99.5) | 16.6 | (12.4, 21.6) | | Abnormal neuro exam | 207/321 | 87 | (73.7, 95.1) | 39.3 | (33.5, 45.3) | 94.7 | (88.9, 98.0) | 19.3 | (14.2, 25.4) | | Abnl neuro exam or vomiting | 217/321 | 87 | (73.7, 95.1) | 36 | (30.3, 42.0) | 94.3 | (88.0, 97.9) | 18.5 | (13.6, 24.4) |
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