Predictive validity and interrater reliability of the German intensive care unit mobility scale (IMS).

The German IMS demonstrates robust predictive validity and exceptional interrater reliability in a multiprofessional intensive care unit setting.

Both sustained mobilisation throughout the intensive care unit stay and higher mobilisation at discharge are associated with shorter hospital stays, reduced mortality, and better functional recovery.

These findings support routine integration of the IMS into intensive care unit practice to guide targeted mobilisation strategies and improve patient outcomes.