Statistical analysis
REGRESSION
For sample size planning, we assumed a reduction of PCICU LOS of 24 h. The determined group sample sizes were Statistical analysis was made using IBM SPSS Statistics (IBM Corp. Released 2021. IBM SPSS Statistics for Macintosh, Version 29.0.0.0. Armonk, NY: IBM Corp). Data are presented as absolute numbers and percentages respectively median and range. For group comparisons of categorical data, the chi squared test was used. In case of cell frequencies < 5, Fisher’s exact test was employed. For statistical group comparisons of continuous data, we employed Student’s Univariate linear regression analysis was used to determine independent influential variables for a prolonged PCICU LOS. Results of linear regression analysis are depicted as a 95% confidence interval (95% CI) and regression coefficient B (