Table 2

Patient demographics

 All patientsMissing data
n (%)N (%)
Total3534
Gender0
 Males1738 (49.2)
Age group, years0
 <60251 (7.1)
 60–69313 (8.9)
 70–79925 (26.2)
 80–891674 (47.4)
 90+371 (10.5)
Symptoms, type
 Amnesia341 (9.6)1464 (41.4)
 Vomiting163 (4.6)900 (25.5)
 Loss of consciousness425 (12.0)620 (17.5)
 Headache535 (15.1)1511 (42.8)
Number of symptoms0
 02428 (68.7)
 1824 (23.3)
 2+282 (8.0)
Admitted0
 Yes2216 (62.7)
Length of stay, days0
 0341 (9.6)
 1–2975 (27.6)
 3–10413 (11.7)
 11+487 (13.8)
Glasgow Coma Scale0
 152871 (81.2)
 14275 (7.8)
 1323 (0.7)
 <1360 (1.7)
Not recorded at site305 (8.6)
INR78 (2.2)
 <2741 (21.0)
 2–41941 (54.9)
 >4252 (7.1)
Not performed at site522 (14.8)
CT scan performed0
 Yes2114 (59.8)
Time to scan (from ED attendance)195 (5.5)
 <1 hour199 (9.4)
 1–4 hours1210 (57.2)
 4+ hours610 (28.9)
CT grading135 (3.8)
 Intracranial abnormality likely to be due to injury192 (5.4)
 Other abnormality likely to be due to injury (eg, scalp haematoma, uncomplicated fracture)417 (11.8)
 Other abnormality unlikely to be due to injury909 (25.7)
 Normal CT scan461 (13.0)
Reversal therapy179 (5.1)
 Yes189 (5.3)
 Prothrombin complex30 (0.8)
 Intravenous vitamin K100 (2.8)
 Oral vitamin K16 (0.5)
 Other*42 (1.2)
Neurosurgical procedures36 (1.0)
 Yes18 (0.5)
Further hospital attendances0
 Head injury-related to original attendance37 (1.0)
Died0
 Yes249 (7.0)
 Head injury-related41 (1.2)
 Other158 (4.5)
 Not known50 (1.4)
Overall adverse outcome rate208 (5.9)
  • *Included combinations of reversal therapy given (prothrombin complex+vitamin K=38; prothrombin complex+vitamin K+platelets+tranexamic acid=1; fresh frozen plasma+vitamin K+platelets=1) and vitamin K (intravenous or oral not known)=1.

  • ED, emergency department; INR, international normalised ratio.