Table 3

Univariate regression analysis for complicated head injury

VariableOR*95% CI (mid-P exact)P values (two-tailed mid-P exact)
Trauma mechanism
 HET3.931.97 to 7.84<0.000
  Car vs pedestrian/bicycle1.7090.24 to 7.900.5134
  Fall >1 m1.0290.35 to 2.690.9307
  High impact1.2850.47 to 3.240.5935
 Fall0.680.35 to 1.370.2767
Trauma setting
 Home0.780.37 to 1.570.493
 Work1.3010.20 to 4.910.682
 School0.810.13 to 2.980.846
 Rec/sport0.370.09 to 1.110.080
 Traffic2.881.04 to 7.020.042
 Bicycle2.701.24 to 5.610.014
Contacts
 First encounter GP0.030.01 to 0.07<0.000
 First encounter ambulance22.1410.60 to 48.05<0.000
 GP only0.020.00 to 0.06<0.000
 Hospital only18.048.54 to 40.41<0.000
 GP/hospital3.151.29 to 7.070.0138
Patient characteristics
 Use of OAC4.101.75 to 9.030.002
 Alcohol intoxication4.301.38 to 11.530.015
 GCS <12 (excl. not reported)41.216.43 to 105.000.000
 Male gender0.690.35 to 1.370.292
 Age >60 years6.603.30 to 13.36<0.000
Age groups†<0.000
 0–1 year (reference group)
 2–5 years1.580.14 to 17.650.711
 6–15 years2.370.24 to 23.100.458
 16–40 years3.420.38 to 31.020.275
 41–60 years7.500.89 to 63.510.065
 >60 years19.272.5 to 146.130.004
  • *ORs are based on conditional maximum likelihood estimate.

  • †Significances of OR calculated are in relation to youngest age group.

  • GCS,Glasgow Coma Scale; GP, general practitioner; HET, high-energy transfer; OAC, oral anticoagulants.