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

 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

 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

 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