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Table 1 The characteristics of included patients (n = 216)

From: Pulmonary infection in traumatic brain injury patients undergoing tracheostomy: predicators and nursing care

Variables Infection group (n = 58) No-infection group (n = 158) t/χ2 p
Male/female 36/22 89/69 1.237 0.065
Age (y) 43.26 ± 6.94 43.92 ± 9.03 7.183 0.121
BMI (kg/m2) 23.39 ± 1.09 24.01 ± 1.45 5.246 0.082
Alcohol drinking 38 (65.51%) 91 (57.59%) 1.132 0.067
Smoking 21 (36.21%) 56 (35.44%) 1.088 0.105
Hypertension 33 (56.89%) 88 (55.69%) 1.235 0.071
Diabetes 28 (48.28%) 40 (25.32%) 1.102 0.013
Hyperlipidemia 14 (24.14%) 35 (22.15%) 1.976 0.097
Hypoproteinemia 27 (46.55%) 30 (18.99%) 1.209 0.002
Types of TBI 1.194 0.064
 Brain contusion 29 (50.00%) 72 (45.57%)   
 Subdural hematoma 17 (29.31%) 45 (28.48%)   
 Epidural hematoma 12 (20.69%) 41 (25.95%)   
GCS at admission 5.87 ± 2.15 6.09 ± 2.23 1.556 0.081
Duration of mechanical ventilation prior to tracheostomy (h) 14.91 ± 4.06 14.55 ± 5.13 2.059 0.102
Duration of coma (h) 28.14 ± 7.39 16.11 ± 5.53 4.132 0.001
Duration of mechanical ventilation (days) 6.26 ± 3.43 3.85 ± 2.01 2.206 0.033
Length of hospital stay (days) 24.16 ± 4.14 17.09 ± 3.42 5.097 0.028
Length of hospital stay post tracheostomy (days) 21.05 ± 3.77 14.26 ± 2.86 2.305 0.045
Death 13 (22.41%) 11 (6.97%) 1.018 0.005