Table 3: Results of Univariate and Multivariate Analyses for Intubation Time, ICU Stay and Postoperative Length of Stay

Intubation Time Multivariate ICU Stay Multivariate Postop Stay Multivariate
Univariate Univariate Univariate
Age under 65 0.0014 0.4686
Renal dysfunction Cr over 1.5 0.0490 0.6462 0.0114 0.6242 0.0443 0.3116
Preoperative heart failure 0.0010 0.7409 0.0012 0.6690 0.0010 0.4402
Emergent or urgent surgery 0.0165 0.2529 0.0124 0.0596
Valve surgery 0.0034 0.9096 0.0515 0.7022
Rigid fixation 0.0001 0.0158 0.0158 0.0086 0.0048 0.0642