“…Much work has focused on early prediction of future health behavior that could be used in preventive healthcare. These works include: predicting future cognitive impairment in elderly people from variables, which are commonly collected in community health care institutions (Na 2019), predicting mortality in elderly people from medical history, diet, exercises and lifestyle activity (Leitzmann et al 2007), predicting mortality in older women from mean daily step counts (Lee et al 2019), predicting changes in exercise behavior from historical physical activity data (Kotsev et al 2014), predicting daily blood pressure levels from historical blood pressure and health behavior (Chiang and Dey 2018), predicting in-hospital mortality, readmission, prolonged length of stay and final discharge diagnoses from electronic health records data (Rajkomar et al 2018), predict future actions from past activities (Kurashima et al 2018), etc. The early prediction information can be useful for a health recommender system to decide when it needs to act, however, it is not sufficient to decide how to act.…”