Application of multilevel zero-inflated Poisson regression for assessing the risk factors of excess hospitalization among patients undergoing abdominal surgeries in Shiraz, Iran

ABSTRACT

Background and Objective: Prolonged hospitalization lead to considerable financial burden for patients as well as health care system. This study aimed to identifying important factors resulting in excess hospitalization days in patients undergoing abdominal surgeries using the multilevel zeroinflated Poisson regression model