According to the WHO Guidelines on Hand Hygiene in Health Care, direct observation of hand hygiene practices is the gold standard for measuring compliance1. Direct observation allows for the assessment of the five moments of hand hygiene, the use of appropriate technique, and the identification of barriers and facilitators to adherence1.

Direct observation also provides an opportunity for immediate feedback and education to the health care workers, which can improve their knowledge and motivation to perform hand hygiene2. Direct observation can be done covertly or overtly, depending on the purpose and context of the audit2.

Other methods of measuring hand hygiene compliance, such as collection of bacterial hand cultures, calculation of infection rates, or a test with a passing score, have limitations and disadvantages. For example, bacterial hand cultures may not reflect the actual transmission of pathogens, infection rates may be influenced by many factors other than hand hygiene, and a test score may not correlate with actual behavior2. References: 1: WHO Guidelines on HandHygiene in Health Care, WHO, 2009 2: Hand Hygiene:Education, Monitoring and Feedback, CDC, 2019