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Table 4 Stepwise logistic regression analysis for each scoring systems with crude mortality at day with the best discriminating power for P. aeruginosa BSI.

From: Comparison of severity of illness scoring systems for patients with nosocomial bloodstream infection due to Pseudomonas aeruginosa

  Died (n = 30) Recovered (n = 33) Univariate analysis Multivariate analysis
VARIABLES AT DAY -1 N % N % OR CI 95% OR CI 95%
APACHE II >22 at day -1 21 84.0 4 16.0 16.92 4.59–62.37 12.51 3.12–50.09
Inadequate antibiotic therapy 16 53.3 14 46.7 1.26 0.75–2.11   
Imipenem resistant P. aeruginosa 10 58.8 7 41.2 1.86 0.60–5.74   
Charlson score ≥ 3 14 77.8 4 22.2 6.34 1.78–22.54 2.28 0.49–10.63
SAPS II >33 at day -1 28 66.7 14 33.3 19.00 3.87–93.36 13.03 2.51–70.49
Inadequate antibiotic therapy 16 53.3 14 46.7 1.26 0.75–2.11   
Imipenem resistant P. aeruginosa 10 58.8 7 41.2 1.86 0.60–5.74   
Charlson score ≥ 3 14 77.8 4 22.2 6.34 1.78–22.54 2.50 0.63–9.90
  Died (n = 27) Recovered (n = 33) Univariate analysis Multivariate analysis
VARIABLES AT DAY +1 N % N % OR CI 95% OR CI 95%
SOFA > 5 at day + 1 22 61.1 14 38.9 5.97 1.81–19.66 5.49 1.56–19.30
Inadequate antibiotic therapy 14 50.0 14 50.0 0.68 0.25–1.90   
Imipenem resistant P. aeruginosa 9 56.3 7 43.8 1.86 0.58–5.90   
Charlson score ≥ 3 12 75.0 4 25.0 5.80 1.59–21.11 5.23 1.31–20.90