Survival, Hazard, Regression, Data Science, Hands On Tutorials.
study increases the hazard by 0.07 = 7%. The 95% confidence intervals range from 3% to 11%. PRIOR_SURGERY has an exponentiated coefficient of e^(-0.75) = 0.47. Each unit increase in value of this variable reduces the hazard rate by (1–0.47)*100=53%. But PRIOR_SURGERY is a boolean variable. So it