A study assessed the relationship between a set of clinical and demographic characteristics and pain in patients at the end of life who received hospice care. Pain was assessed when the person began receiving hospice care and every few days until they died or were discharged. The outcome of interest was whether the patient had severe pain at his/her last observation. Which one of the following types of analysis would be best to use in this case? A) Linear regression B) COX proportional hazard regression C) Logistic regression D) ANOVA E) Chi-Square test