In this article selected results of a descriptive study on personnel staffing and patient care in German intensive care units are presented and discussed. The main focus is on comparing features of personnel staffing with indicators of the job situation and patient care. The study is based on a standardized survey of nursing managers from 535 intensive care units carried out in 2011. The results show that a low nurse-patient ratio in intensive care units has a tendency to cause higher risks in patient care and also in other stress indicator situations, such as absenteeism.