Patient safety is the most common topic in medical care (Flott et al., 2017; Lancet, 2016). Typical patient-safety outcomes in the field of nursing are falls, hospital-acquired infection (HAI), hospital-acquired pneumonia (HAP) and hospital-acquired pressure ulcer (HAPU). These outcomes challenge the quality of care. For example, falls have devastating physical, emotional and financial consequences (Godlock, Christiansen, & Feider, 2016). The hospital fall rate is almost 9 falls per 1,000 patient days, with one-third to one-half of all falls resulting in injury (Stah & O'Neill, 2015). A survey of 490 tertiary hospitals in China reported a fall rate of 0.057 per