Abstract

Patient safety events (PSEs) have detrimental consequences for patients and healthcare staff, highlighting the importance of prevention. Although evidence shows that nurse staffing affects PSEs, the role of an appropriate nursing care delivery system remains unclear. The current study aimed to investigate whether nursing care delivery systems could prevent PSEs. This retrospective study was conducted in Japan. The study examined the collaborative 4:2 nursing care delivery system in which 2 nurses are assigned to care for 4 patients, collaborating to perform tasks, and provide care. The cohort receiving care from a collaborative 4:2 nursing care delivery system was labeled the postintervention, whereas the cohort receiving care from a conventional individualized system, in which one nurse provides care for 2 patients, was labeled the preintervention. The primary outcome was the occurrence of PSEs. The preintervention and postintervention comprised 561 and 401 patients, respectively, with the latter consisting of a younger and more critically ill population. The number of PSEs per 1000 patient-days was not significantly different between the 2 groups (10.3 [95% confidence interval, 7.1-13.5] versus 6.0 [95% confidence interval, 3.2-8.9], P = 0.058). Multiple logistic regression analysis showed that the collaborative 4:2 nursing care delivery system was significantly associated with PSEs (adjusted odds ratio, 0.53; 95% confidence interval, 0.29-0.95; P = 0.037). These findings suggest that in an emergency intensive care unit, a collaborative nursing care delivery system was associated with a decrease in PSEs.

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