Factors associated with emergency hospital readmission in digestive and hepatobiliary diseases

OBJECTIVE: To describe the epidemiological characteristics of emergency readmissions due to digestive and hepatobiliary diseases within the hospitals of the Valencian Health Service (VHS), Spain, and to examine their relationship with defined variables related to patients or to previous periods of hospitalization. PATIENTS AND METHODS: Out of the 212,947 episodes of patient hospitalization included in the Uniform Hospital Discharge Data Set of the VHS, excluding those persons under 16 years of age, those who had died in hospital or were discharged due to being transferred to another hospital and also excluding the two hospitals whose record were of poor quality, 18,075 patients were chosen whose principal diagnosis on first admission was one of a digestive or hepatobiliary disease. After a descriptive analysis the relationship was explored between risk of readmission and the variables of age, gender, hospital funding, whether the environment is a rural or urban one, the hospital itself, the diagnostic group, comorbidity, type of admission, length of stay, presence of surgical procedure, discharge criteria and service using an independent Cox Proportional Hazards analysis for each variable and a second Cox analysis adjusted for selected variables. RESULTS: 16.9% of those patients discharged for digestive disorders are re-admitted within a year. The risk of readmission is associated with age, comorbidity, male sex and chronic diseases and, with respect to the previous episode of hospitalization, it is associated with emergency admission, longer period of hospitalization, non-surgical discharge and admission to certain hospitals. CONCLUSION: The risk of emergency readmission is associated with defined variables relating to patient or previous episodes of hospitalization connected with a more serious condition. The risk adjustment carried out could be used in order to identify high-risk cases which could then be paid special attention in order to delay or prevent readmission and as an indirect indicator for use in monitoring the quality of hospital care.