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Table 1 Univariate logistic regression analysis of 1-year mortality

From: Death after discharge: prognostic model of 1-year mortality in traumatic brain injury patients undergoing decompressive craniectomy

  Total (n=230) Survivor (n=160) Non-survivor (n=70) Odds ratio 95% CI P value
Age, years 52.50 (42.00–60.00) 50.50 (38.00–58.00) 59.00 (50.00–65.00) 1.050 (1.025–1.076) <0.001
Female 58 (25.22%) 42 (26.25%) 16 (22.86%) 0.832 (0.430–1.610) 0.586
Mechanism of injury     0.855 (0.632, 1.158) 0.312
 Motor vehicle accident 114 (49.57%) 73 (45.63%) 41 (58.57%)   
 Fall 82 (36.65%) 63 (39.38%) 19 (27.14%)   
 Strike 7 (3.04%) 5 (3.13%) 2 (2.86%)   
 Others 27 (11.74%) 19 (11.88%) 8 (11.43%)   
GCS score 6.00 (4.00–8.00) 7.00 (4.00–8.00) 4.50 (3.00–7.00) 0.798 (0.704–0.904) <0.001
Fg (g/L) 1.86 (1.39–2.27) 1.86 (1.44–2.37) 1.81 (1.23–2.18) 0.769 (0.544–1.087) 0.137
D-dimer (mg/L) 42.56 (18.47–98.10) 37.26 (16.61–76.46) 75.17 (31.41–131.40) 1.009 (1.005–1.014) <0.001
Coagulopathy 51 (22.17%) 29 (18.13%) 22 (31.43%) 2.070 (1.086–3.947) 0.027
GLU >8.33mmol/L 159 (69.13%) 110 (68.75%) 49 (70.00%) 1.061 (0.576–1.954) 0.85
RBC (man >5.5×1012/L or <4.0×1012/L, woman >5.0 ×1012/L or <3.5×1012/L) 56 (24.56%) 40 (25.32%) 16 (22.86%) 0.874 (0.450–1.697) 0.691
N/L ratio 14.55 (8.29–24.57) 14.12 (8.59–22.09) 14.85 (7.38–27.08) 1.008 (0.987–1.030) 0.448
Midline shift >0 97 (42.17%) 73 (45.63%) 24 (34.29%) 0.622 (0.347, 1.114) 0.109
Completely effaced basal cisterns 40 (17.39%) 20 (12.50%) 20 (28.57%) 2.800 (1.392–5.632) 0.004
Subarachnoid hemorrhage (Fisher scales) 2.00 (0.00–3.00) 2.00 (0.50–3.00) 2.00 (0.00–3.00) 0.929 (0.759–1.138) 0.478
Contusion volume (cm3) 15.99 (0.00–40.82) 14.48 (0.00–44.20) 20.13 (0.00–38.01) 0.999 (0.993–1.005) 0.822
Perioperative bleeding >750 mL 178 (77.39%) 118 (73.75%) 60 (85.71%) 2.136 (1.002–4.550) 0.049
Mechanical ventilation 84 (36.52%) 53 (33.13%) 31 (44.29%) 1.605 (0.903–2.852) 0.107
Tracheotomy 102 (44.35%) 70 (43.75%) 32 (45.71%) 1.083 (0.616–1.904) 0.783
Deep venous thrombosis 22 (9.57%) 15 (9.38%) 7 (10.00%) 1.074 (0.418–2.762) 0.882
Use of noradrenaline to treat hypotension 39 (16.96%) 21 (13.13%) 18 (25.71%) 2.291 (1.131–4.640) 0.021