BACKGROUND: From a nursing perspective, tasks that are not carried out, and the consequences of this, have been studied for over a decade. The difference between Registered Nurses (RNs) and nurse assistants (NAs) regarding qualifications and work tasks, and the profound knowledge around RN-to-patient ratios, warrants investigating missed nursing care (MNC) for each group rather than as one (nursing staff).

AIM: To describe and compare RNs and NAs ratings of and reasons for MNC at in-hospital wards.

METHODS: A cross-sectional study with a comparative approach. RNs and NAs at in-hospital medical and surgical wards for adults were invited to answer the MISSCARE Survey-Swedish version, including questions on patient safety and quality of care.

RESULTS: A total of 205 RNs and 219 NAs answered the questionnaire. Quality of care and patient safety was rated as good by both RNs and NAs. Compared to NAs, RNs reported more MNC, for example, in the item 'Turning patient every 2 h' (p < 0.001), 'Ambulation three times per day or as ordered' (p = 0.018), and 'Mouth care' (p < 0.001). NAs reported more MNC in the items 'Medications administered within 30 min before or after scheduled time' (p = 0.005), and 'Patient medication requests acted on within 15 min' (p < 0.001). No significant differences were found between the samples concerning reasons for MNC.

CONCLUSION: This study demonstrated that RNs' and NAs' ratings of MNC to a large extent differed between the groups. RNs and NAs should be viewed as separate groups based on their different knowledge levels and roles when caring for patients. Thus, viewing all nursing staff as a homogenous group in MNC research may mask important differences between the groups. These differences are important to address when taking actions to reduce MNC in the clinical setting.