Symptom | Patients | Non-missing, n | Risk in those symptom positive, % (95% CI) | Risk in those symptom negative, % (95% CI) | Relative risk* | 95% CI | p Value |
---|---|---|---|---|---|---|---|
Vomiting | All | 2634 | 15.95 (9.51 to 9.67) | 4.05 (3.34 to 4.90) | 3.94 | 2.32 to 6.70 | <0.001 |
GCS=15 only | 2237 | 9.84 (5.65 to 16.56) | 3.26 (2.58 to 4.11) | 3.00 | 1.68 to 5.41 | 0.001 | |
Amnesia | All | 2070 | 14.96 (11.54 to 19.16) | 3.47 (2.70 to 4.43) | 4.37 | 3.05 to 6.25 | <0.001 |
GCS=15 only | 1796 | 14.07 (10.36 to 18.83) | 2.87 (2.14 to 3.84) | 4.90 | 3.34 to 7.19 | <0.001 | |
Headache | All | 2023 | 7.66 (5.69 to 10.25) | 3.63 (2.79 to 4.71) | 2.11 | 1.33 to 3.34 | 0.001 |
GCS=15 only | 1723 | 5.64 (3.87 to 8.15) | 3.17 (2.33 to 4.30) | 1.78 | 0.97 to 3.26 | 0.062 | |
LOC† | All | 2914 | 14.82 (11.75 to 18.53) | 3.58 (2.91 to 4.38) | 4.14 | 2.92 to 5.88 | <0.001 |
GCS=15 only | 2475 | 10.48 (7.61 to 14.26) | 2.99 (2.35 to 3.80) | 3.50 | 2.26 to 5.41 | <0.001 |
*Compared with no symptoms.
†LOC=loss of consciousness.
GCS, Glasgow Coma Scale.