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Table 2 Multiple Cox regression analysis of survival of ICU-acquired infection patients by ward type

From: Survival rate in patients with ICU-acquired infections and its related factors in Iran’s hospitals

Variable Adjusted HR (95% CI)
General ICU Internal ICU Surgical ICU Pediatric ICU Neonatal ICU
Age Year 1.01* (1.009–1.01) 1.009* (1.007–1.01) 1.017* (1.015–1.019) 0.99 (0.98–1)
Gender Male 1 1 1 1 1
Female 1.06* (1.01–1.11) 1.06 (0.99–1.14) 1.13* (1.05–1.22)
Hospitalization-infection length ≤8 days 1 1 1 1 1
> 8 days 0.36* (0.34–0.38) 0.37* (0.34–0.4) 0.42* (0.39–0.46) 0.45* (0.35–0.57) 0.39* (0.32–0.48)
Infection type BSI 1.5* (1.15–1.95) 1.5* (1.26–1.78) 2.35* (1.3–4.26)
PENU & LRI 1.35* (1.02–1.77) 0.96 (0.79–1.17) 1.26 (0.69–2.31)
SSI 1 1 1 1 1
UTI 1.23 (0.95–1.59) 1.04 (0.87–1.24) 0.56 (0.27–1.18)
VAE 1.51* (1.19–1.93) 1.33* (1.14–1.54) 2.05* (1.09–3.87)
Other 1.43* (1.07–1.92) 1.9* (1.54–2.34) 0.62 (0.33–1.17)
Device use No 1 1 1 1 1
Yes 1.16* (1.1–1.23) 1.19 (0.95–1.48) 1.26* (1.02–1.56)
Microorganism Staphylococcus epidermidis 1 1 1 1 1
Staphylococcus aureus 0.98 (0.81–1.19) 1.31 (0.99–1.74) 1.56* (1.1–2.2) 0.52 (0.21–1.27)
Coagulase negative staphylococci 1.1 (0.88–1.38) 1.54* (1.08–2.19) 1.5* (1.01–2.21) 0.76 (0.4–1.46)
Acinetobacter 1.25* (1.06–1.48) 1.31* (1.03–1.66) 1.97* (1.45–2.68) 2.91* (1.86–4.54)
Escherichia coli 1.09 (0.92–1.3) 1.41* (1.1–1.82) 1.77* (1.29–2.42) 1.41 (0.83–2.39)
Enterobacter 1.04 (0.85–1.27) 1.27 (0.96–1.69) 1.32 (0.91–1.9) 2.92* (1.77–4.81)
Enterococcus 0.97 (0.77–1.23) 1.26 (0.9–1.76) 2.09* (1.44–3.03) 1.74 (0.84–3.61)
Pseudomonas aeruginosa 0.9 (0.75–1.08) 1.02 (0.78–1.33) 1.41* (1.01–1.95) 2.13* (1.21–3.75)
Citrobacter 1.05 (0.73–1.32) 1.19 (0.75–1.88) 1.49* (1.01–2.2) 2.25 (0.97–5.17)
Candida 1.23* (1.01–1.51) 1.54* (1.15–2.06) 2.76* (1.95–3.9) 4.9* (2.22–10.81)
Candida albicans 1.26 (0.99–1.61) 1.42 (0.99–2.05) 1.64* (1.09–2.47) 2.95* (1.33–6.5)
Klebsiella 0.97 (0.82–1.16) 1.4* (1.09–1.8) 1.62* (1.17–2.24) 2.52* (1.56–4.04)
Klebsiella pneumoniae 0.96 (0.8–1.15) 1.29 (0.98–1.69) 1.77* (1.29–2.45) 2.3* (1.3–4.08)
Other 0.99 (0.83–1.19) 1.16 (0.89–1.52) 1.61* (1.36–2.56) 1.56 (0.96–2.55)
Unknown 1.25* (1.05–1.49) 1.4* (1.08–1.81) 1.87* (1.17–2.22) 1.86* (1.19–2.9)
Hospital type Government 1.34* (1.09–1.64)
Semi-government 1.5* (1.16–1.92)
Private 1 1 1 1 1
Other 1.07 (0.84–1.37)
  1. *P < 0.05
  2. HR Hazard Ratio, CI Confidence Interval, BSI Blood Stream Infections, PENU & LRI Pneumonia Events & Lower Respiratory Tract Infection, SSI Surgical Site Infection, UTI Urinary Tract Infection, VAE Ventilator Associated Events.