Evaluation of the National Tool for Observation of Infection Prevention Measures in the Healthcare (NOST)

The evaluation og NOST is designed as a cluster-randomized controlled trial with two arms where eligible wards in hospitals are randomly allocated into an intervention and a control arm. NOST is implemented in the intervention wards at the start of the evaluation period, and compliance with hand hygiene and other outcomes are measured in both the interventions and control wards one year later. Intervention The intervention in the study is to implement NOST, which includes: * observation and recording of compliance with hand hygiene recommendations * identification of areas for improvement * training or other actions taken to improve IPC in general or compliance with hand hygiene. Thus, the intervention includes both observation of compliance and any additional improvement measures initiated as a result of the introduced NOST. Observations of hand hygiene will be carried out in sessions of 20-30 minutes. During this period, all situations where hand hygiene is indicated (recommended) and whether hand hygiene is performed or not, are recorded. The number of hand hygiene indications during a session varies but will often be between 10 and 20. When the intervention group has implemented and followed NOST for a year, the investigators will measure compliance with hand hygiene recommendations and reported HAIs, in wards that have had NOST and in wards that have not introduced NOST. The intervention arm will be followed over time with repeated measurements of both compliance with hand hygiene and other outcome measures, to see if the effect increases in line with implemented observations and quality improvement measures, or if the effect decreases during the study period.