Development of a scale to assess nurses' difficulties in collaborating with physicians in responding to clinical deterioration during night shifts.

We developed the NCDNP-N and confirmed its validity and reliability. The study results suggest that the responsibilities and competence of nurses working night shifts and communication with the night-covering physician are associated with difficulties in nighttime collaboration. The NCDNP-N may help identify challenges in clinical settings as well as can be utilized in the evaluation study for improving nighttime collaboration.