Table 2 Comparison of patients with and without pneumonia, means given with SD and 95% CI, ^amedian with 25th – 75th percentile

N

811 (72.5%)

308 (27.5%)

–

ISS (pts.)

25.4 ± 11.8

32.6 ± 12.8

<  0.001

RISC II mortality prognosis (%)

8.8

19.5%

<  0.001

Hospital mortality (%)

7.9% (6.0–9.7)

10.1% (6.7–13.4)

0.30

AIS_head/neck (pts.)

1.4 ± 1.7

2.3 ± 1.9

<  0.001

AIS_thorax (pts.)

3.5 ± 0.7

3.7 ± 0.8

<  0.001

AIS_abdomen (pts.)

0.9 ± 1.4

1.0 ± 1.4

0.88

AIS_extremities (pts.)

1.6 ± 1.4

2.0 ± 1.4

<  0.001

Male (%)

74.4 (71.3–77.4)

80.8 (76.4–85.2)

0.028

Age (yrs.)

47.5 ± 18.5

51.3 ± 18.9

0.002

Penetrating trauma (%)

4.3 (2.9–5.6)

1.3 (0.0–2.6)

0.027

LOS (days)

16.3 ± 15.1

29.1 ± 19.4

<  0.001

ICU (days)

6.3 ± 8.1

21.8 ± 15.4

<  0.001

Time on ventilation (h, all)

58.0 ± 128.2

346.0 ± 306.7

<  0.001

Time on ventilation (h, ventilated patients)

114.9 ± 161.4

368.9 ± 303.1

<  0.001

GOS^a

5 (4–5)

4 (3–5)

<  0.001

BAL (%)

4.9 (3.4–6.4)

79.5 (75.0–84.1)

<  0.001

Aspiration (%)

3.3 (2.1–4.6)

21.1 (16.5–25.7)

<  0.001

Tracheotomy (%)

4.6 (3.1–6.0)

44.8 (39.3–50.4)

<  0.001

Reintubation (%)

2.5 (1.4–3.5)

17.9 (13.6–22.1)

<  0.001

Discharge on ventilation (%)

2.2 (1.2–3.2)

17.3 (13.0–21.5)

<  0.001

Worst Horovitz Index

282.9 ± 135.7

137.8 ± 83.4

<  0.001

ECMO (%)

0.4 (0.0–0.8, n = 3)

0.0 (n = 0)

1.0