Patient falls refer to patients’ unplanned descent to the floor with or without injuries to the patients. Patient falls are common for inpatients, averaging 2.3 to 7 falls per 1,000 patient days. About 30% of the falls lead to injuries, which contribute to higher healthcare cost. In order to prevent falls, it is very important to understand the epidemiology of patient falls, including the characteristics of fallers, the distribution and patterns of falls, contributing factors, and fall-related injuries.