BackgroundMissed nursing care occurs globally, and the consequences are severe for the patients when fundamental care needs are not fulfilled, nor delivered in a person-centred way. This study aimed to investigate the occurrence and cause of missed nursing care, and the relationship between registered nurses’ and nursing assistants’ perceptions of missed nursing care, in a surgical care context.MethodsA quantitative study was performed using the MISSCARE survey, measuring missed nursing care and associated reasons, in three surgical wards with registered nurses and nursing assistants as the participants (n = 118), during May-November in 2022. The MISSCARE survey also covers background data such as job satisfaction and intention to leave. The survey was distributed paper-based and the response rate was 88%.ResultsAspects of nursing care rated to be missed the most were ‘attending interdisciplinary care conferences’, ‘turning patient every 2 h’, ‘ambulation 3 times per day or as ordered’, and ‘mouth care’. Differences between registered nurse and nursing assistant ratings were detected for eight out of 24 items, where registered nurses rated more missed nursing care. The uppermost reasons for missed nursing care were ‘inadequate number of staff’ and ‘unexpected rise in patient volume and/or acuity on the unit’. Registered nurses and nursing assistants rated differently regarding six of 17 items. Almost every fourth staff member (24.6%, n = 29) had the intention to leave within a year in the present department.ConclusionsThe occurrence of missed nursing care is frequent in the surgical context, and in combination with a high number of staff members intending to leave their employment, poses a hazard to patient safety. Registered nurses, holding higher educational levels, reported more missed care compared with the nursing assistants. The main reason for missed nursing care was an inadequate number of staff. These findings support a warranted investment in nursing within the organisation. The results can be used to form strategies and interventions, to reduce nurse attrition and optimise competence utilisation, and to achieve safe person-centered fundamental care.