Costs Attributable to Falls Based on Diagnosis-Related Groups (DRGs) Analysis of Hospitalised Patients: A Case-Control Study.

Background/objectives: Falls are the most common adverse events in hospitals. This study aimed to estimate excess hospitalisation costs attributable to inpatient falls, using Diagnosis-Related Group (DRG) relative weights as a proxy for resource consumption. Methods: Case-control study. Cases included patients who had sustained a fall during hospitalisation between 2020 and 2022 in 19 inpatient units. Controls were selected with matching technique based on age and admission period. Diagnosis-Related Groups and their resource consumption and cost estimators (relative weights) were provided by the Hospital's Coding Unit. Results: A total of 613 falls were analysed against 623 controls. The Diagnosis-Related Group 'Lower limb amputation except toes' was associated with a fourfold higher risk of falling compared to others. Five more were identified in which the case group incurred significantly higher costs than the control group. These included three surgical Diagnosis-Related Group, 'Urethral and transurethral procedures', 'Heart valve procedures without acute myocardial infarction or complex diagnosis', and 'Arterial procedures on the lower limb', and two medical, 'Heart failure' and 'Major pulmonary infections and inflammations'. Conclusions/Implications for practice: Identifying Diagnosis-Related Groups in which falls are associated with increased hospitalisation costs allows for a comprehensive assessment of the process, taking into account resource consumption and the clinical characteristics of hospitalised patients. These findings will enable nurses to develop targeted strategies to enhance the safety of hospitalised patients that contribute to the sustainability of the healthcare system.