Background: The provision of home healthcare is increasing in response to the growing aging population with the need for chronic disease management in their homes. Safety work differs from hospital care. The incidence of ad-verse events in home healthcare is sparsely studied but is estimated to occur in-one third of patients, and most are deemed preventable. Although nursing care is crucial for risk assessment and preventive work in the home environment, the role of registered nurses in the prevention of no-harm incidents and adverse events has not re-ceived sufficient scientific attention. Objectives: To explore nursing-sensitive events in patients receiving home healthcare. Design, setting and participants: A Swedish national multicenter study based on a structured record review of 600 randomly chosen healthcare records from 10 organizations in different regions of the country. Methods: Ten trained teams, each including physician(s) and registered nurses, undertook a review based on the Global Trigger Tool method. The review covered a maximum of 90 days from admission to home healthcare. First, each record was screened for the presence of 38 predefined triggers. In the second step, every potential event was assessed according to preventability, types of events, severity, time of occurrence, consequences of the event, and potential contributing causes. Results: In total, 699 events were identified in the study. Of these, 495 (74.0%) were classified as nursing-sensitive (227 no-harm incidents and 268 adverse events) and affected 267 (44.5%) patients, with a mean of 1.9 events per patient. The majority (n = 367, 73.1%) were considered preventable. The most prominent types of nursing -sensitive event were falls (n = 138, 27.9%), pressure ulcers (n = 62, 12.5%), healthcare-associated infections (n = 58, 11.7%) and medication management (n = 50, 10.1%). Concerning severity, 45.9% were classified as no-harm incidents and another 36.6% resulted in temporary harm that required extra healthcare resources: 226 hospital days, 66 physician visits in outpatient care, and 99 in home healthcare. All severity types occurred from day 1, except death, which included only one patient. The most frequent contributing factors were deficien-cies in nursing care, treatment & diagnosis, with the subgroups nursing care, observation, treatment & follow-up, followed by deficiencies in the organization. Conclusions: Nursing-sensitive events in home healthcare are common, often preventable, and occur from the start of the care period. This study contributes to increased knowledge of patient safety shortcomings and points to the important role that registered nurses play in patient safety work.(c) 2022 Elsevier Ltd. All rights reserved.