When adding patient age as a second predictor in a regression model for surgical duration, what does an increase in adjusted R-squared indicate?

What does an odds ratio (OR) of 0.5 indicate in a logistic regression model assessing the impact of regional anesthesia on the risk of postoperative nausea?

What is indicated by a positive bias in a Bland-Altman plot?

In a study on post-anesthesia complications, which statistical model is most appropriate for predicting a binary outcome like “presence of nausea (yes/no)”?

Which of the following outcomes is most suitable for Poisson regression in a nurse anesthesia study?

What is the primary purpose of Cohen’s kappa?

In inter-rater reliability, what does high agreement between two raters imply?

Which statistical method is most appropriate for analyzing the time until extubation failure in ICU patients?

Which of the following combinations of sensitivity and specificity would be most desirable for a screening test in anesthesia?

20.  50% of testosterone is bound to this substance.