Table 4

Univariable analysis results grouped by neurological symptoms category

SymptomPatientsNon-missing, nRisk in those symptom positive, % (95% CI)Risk in those symptom negative, % (95% CI)Relative risk*95% CIp Value
VomitingAll263415.95 (9.51 to 9.67)4.05 (3.34 to 4.90)3.942.32 to 6.70<0.001
GCS=15 only22379.84 (5.65 to 16.56)3.26 (2.58 to 4.11)3.001.68 to 5.410.001
AmnesiaAll207014.96 (11.54 to 19.16)3.47 (2.70 to 4.43)4.373.05 to 6.25<0.001
GCS=15 only179614.07 (10.36 to 18.83)2.87 (2.14 to 3.84)4.903.34 to 7.19<0.001
HeadacheAll20237.66 (5.69 to 10.25)3.63 (2.79 to 4.71)2.111.33 to 3.340.001
GCS=15 only17235.64 (3.87 to 8.15)3.17 (2.33 to 4.30)1.780.97 to 3.260.062
LOC†All291414.82 (11.75 to 18.53)3.58 (2.91 to 4.38)4.142.92 to 5.88<0.001
GCS=15 only247510.48 (7.61 to 14.26)2.99 (2.35 to 3.80)3.502.26 to 5.41<0.001
  • *Compared with no symptoms.

  • †LOC=loss of consciousness.

  • GCS, Glasgow Coma Scale.