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Table 5 Outcome data according to infection status on admission and ICU-acquired infection

From: Intensive care acquired infection is an independent risk factor for hospital mortality: a prospective cohort study

 

No infection on admission, no ICU-acquired infection (N = 49)

No infection on admission, but ICU-acquired infection (N = 35)

Infection on admission, no ICU-acquired infection (N = 206)

Infection on admission, also ICU-acquired infection (N = 45)

P value

Total TISS scorea

170 (130–274)

324 (255–510)

197 (136–278)

668 (397–1,013)

<0.001

LOS in ICU (days)

3 (2.2–5.3)

7.6 (5.5–11.2)

4 (2.8–5.9)

14 (7–21.6)

<0.001

LOS in hospital (days)

17 (8–25.5)

18 (12–33)

16 (9–27)

31 (24–43)

<0.001

ICU mortality

1 (2.0)

3 (8.6)

12 (5.8)

4 (8.9)

0.43

Total hospital mortality

3 (6.1)

9 (25.7)

35 (17)

16 (35.6)

0.002

Observed/predicted mortalityb

0.15 (0.03–0.44)

0.75 (0.34–1.42)

0.35 (0.25–0.49)

0.70 (0.40–1.13)

 
  1. Values are presented as median (with 25th to 75th percentiles in parentheses), as the number (percentage) of patients or as ratio (with 95% CI). aTherapeutic intensity score during the whole ICU stay. bCalculated according to APACHE II score on admission. ICU, intensive care unit; LOS, length of stay; TISS, Therapeutic Intensity Scoring System.