A Process Cube based Approach of Process Mining in Analysing Frailty Progression Exploiting Electronic Frailty Index Topics: Big Data in Healthcare; Data Mining and Data Analysis; Data Visualization; Electronic Health Records and Standards; ICT, Ageing and Disability In Proceedings of the 15th International Joint Conference on Biomedical Engineering Systems and Technologies - Volume 5: BIOSTEC, 605-613, 2022