Table 2

Multivariate logistic regression analysis for the significant factors associated with in-RICU adverse treatment outcomes

 Significant factor for adverse treatment outcomes OR (95% CI) P values RICU length of stay >14 days† Eosinophil percentage: ≦2% vs >2% 12.13 (2.82 to 52.12) 0.001* Modified GCS: per increase of 1 point 0.92 (0.84 to 1.00) 0.053 Failed weaning† APACHE II score: per increase of 1 point 1.08 (1.03 to 1.13) 0.001* Death† Age: per 1-year increase 1.05 (0.99 to 1.11) 0.125 Smoking: ex-smoker versus never smoker 0.29 (0.11 to 0.76) 0.011* Smoking: current smoker versus never smoker 0.30 (0.10 to 0.89) 0.030* Prior admission within 3 months: yes versus no 2.06 (0.90 to 4.72) 0.089 Pneumonia Severity Index: >90 vs 0–90 2.51 (0.54 to 11.68) 0.241 PaO2/FiO2: per increase of 1 point 1.00 (0.99 to 1.00) 0.070 APACHE II score: per increase of 1 point 1.07 (1.00 to 1.15) 0.069 Pseudomonas aeruginosa: yes versus no 2.72 (1.09 to 6.76) 0.032* Readmission arising from respiratory diseases within 3 months† COPD severity: II vs I 0.47 (0.18 to 1.24) 0.128 COPD severity: III vs I 1.51 (0.64 to 3.59) 0.349 COPD severity: IV vs I 0.99 (0.31 to 3.15) 0.980
• *P<0.05.

• †The detailed information on the multivariate logistic regression analysis regarding the adverse outcome of RICU length of stay >14 days was as follows: Cox-Snell R2=0.092, Nagelkerke R2=0.124, goodness of fit: X2=25.303 (p<0.05), H-L test=5.745 and overall percentage correct=62.6; that regarding the adverse outcome of failed weaning was as follows: Cox-Snell R2=0.046, Nagelkerke R2=0.061, goodness of fit: X2=12.271 (p<0.05), H-L test=10.360 and overall percentage correct=61.1; that regarding the adverse outcome of death was as follows: Cox-Snell R2=0.127, Nagelkerke R2=0.224, goodness of fit: X2=33.005 (p<0.05), H-L test=10.431 and overall percentage correct=87.2; that regarding the adverse outcome of readmission arising from respiratory diseases within 3 months was as follows: Cox-Snell R2=0.035, Nagelkerke R2=0.056, goodness of fit: X2=9.454 (p<0.05), H-L test=0.000 and overall percentage correct=80.2.

• CI, confidence interval; OR, odds ratio; please also refer to table 1 footnote for the rest of abbreviations.