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Table 7 Risk factors for critical patient-related adverse events during intra-hospital transport

From: High incidence of adverse events during intra-hospital transport of critically ill patients and new related risk factors: a prospective, multicenter study in China

Variable Univariate analysis Multivariate analysis
OR (95 % CI) P value OR (95 % CI) P value
Patient characteristics
 Age, yr 1.00 (0.99–1.01) 0.71 NT  
 Sex 0.70 (0.46–1.08) 0.10 NT  
 Weight, kg 1.03 (1.01–1.04) 0.00*   
   < 65 Reference Reference
   ≥ 65 1.95 (1.30–2.94) 0.00* 1.55 (0.95–2.54) 0.08
 ICU admission type 0.95 (0.76–1.19) 0.67 NT  
Clinical characteristics before transport
 APACHE II score 1.66 (1.29–2.14) 0.00*   
   ≤ 11 Reference Reference
  12–19 1.66 (1.01–2.74) 0.04* 1.44 (0.79–2.63) 0.23
   ≥ 20 2.75 (1.66–4.57) 0.00* 2.49 (1.23–5.03) 0.01*
 Glasgow Coma Scale score 0.76 (0.60–0.96) 0.02*   
  15 Reference Reference
  9–14 0.93 (0.53–1.64) 0.80 0.67 (0.33–1.38) 0.28
   ≤ 8 1.82 (1.14–2.91) 0.01* 0.89 (0.46–1.74) 0.74
 Artificial airway 1.38 (0.92–2.07) 0.12 NT  
 Ventilation 1.48 (0.99–2.20) 0.06 NT  
 Number of catheter 1.28 (1.07–1.54) 0.01* 1.20 (0.95–1.51) 0.13
 Arterial blood gas analysis     
  pH    NT  
   7.35–7.45 Reference   
    < 7.35 or >7.45 1.03 (0.69–1.54) 0.88   
  PaO2, mmHg 0.99 (0.99–1.00) 0.00*   
    ≥ 80 Reference Reference
    < 80 2.49 (1.61–3.86) 0.00* 2.26 (1.31–3.91) 0.00*
  PaCO2, mmHg    NT  
   35–45 Reference   
    < 35 or >45 1.36 (0.91–2.02) 0.13   
  Bicarbonate level, mmol/L    NT  
   22–27 Reference   
    < 22 or >27 1.28 (0.86–1.92) 0.23   
  Lactate level, mmol/L 1.87 (1.51–2.33) 0.00*   
    < 2 Reference   
    ≥ 2 2.82 (1.77–4.49) 0.00* 3.12 (1.75–5.58) 0.00*
  Glucose level, mmol/L     
   4.0–10.0 Reference   
    < 4 or >10 2.24 (1.43–3.50) 0.00* 1.80 (1.05–3.08) 0.03*
 Vital signs     
  SBP, mmHg    NT  
   90–150 Reference   
    < 90 or >150 1.10 (0.62–1.95) 0.74   
  DBP, mmHg 1.00 (0.98–1.01) 0.64 NT  
  MAP, mmHg 1.00 (0.99–1.02) 0.95 NT  
  Heart rate     
   50–110 Reference   
    < 50 or >110 4.53 (2.76–7.42) 0.00* 2.97 (1.66–5.32) 0.00*
  Respiratory rate     
   12–25 Reference   
    < 12 or >25 3.06 (1.92–4.89) 0.00* 2.45 (1.39–4.33) 0.00*
  Pulse oximetry 0.84 (0.78–0.91) 0.00*   
    ≥ 95 Reference   
    < 95 3.56 (1.94–6.52) 0.00* 2.79 (1.31–5.95) 0.01*
 Analgesia 1.34 (0.78–2.30) 0.28 NT  
 Sedation 1.96 (1.25–3.09) 0.00* 1.87 (1.07–3.29) 0.03*
 Vasoactive drug support 1.51 (0.96–2.37) 0.07 NT  
Transport characteristics
 Analgesia 0.90 (0.47–1.76) 0.76 NT  
 Sedation 1.27 (0.77–2.10) 0.36 NT  
 Vasoactive drug support 1.76 (1.10–2.83) 0.02* 1.63 (0.92–2.88) 0.10
 Emergency transport 1.54 (1.33–1.89) 0.01* 1.26 (0.68–2.35) 0.47
 Multiple IHTs of one patient 0.84 (0.54–1.31) 0.45 NT  
 Night transport 0.83 (0.37–1.87) 0.65 NT  
 Transport duration, minutes 0.99 (0.97–1.01) 0.18 NT  
  1. APACHE Acute Physiology and Chronic Health Evaluation, PaO 2 partial pressure of oxygen in arterial blood, PaCO 2 partial pressure of carbon dioxide in arterial blood, SBP Systolic blood pressure, DBP diastolic blood pressure, MAP mean arterial pressure, NT not tested, OR odds ratio, CI confidence interval
  2. *P < 0.05