For inpatient departments, essential data to collect are the patients’ age and gender, antimicrobial agent, dose per administration, number of doses per day and route of administration. Besides antibiotics, also antifungals, antimycotics, antivirals, antibiotics for the treatment of tuberculosis and antimalarials are surveyed. Other mandatory variables include the anatomical site of infection or prophylaxis according to a list of provided reasons for treatment or prophylaxis, indication for therapy (community versus hospital acquired infection or prophylaxis) and whether the treatment choice is determined by detected micro-organisms and available microbiological or biomarker data. For the optional HAI module, extra details on invasive devices are collected (e.g. peripheral vascular catheter, indwelling urinary catheter etc.).

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For outpatient departments, essential data to collect are the patients’ age category, gender and presenting symptoms. Data on admission status should be additionally collected for emergency and observation departments. More detailed information should be collected for each patient receiving antimicrobial treatment. This includes information on their specific age and underlying morbidities, as well as treatment-related information, such as the specific antimicrobial agent, dose per administration, number of doses per day, route of administration, anatomical site of infection, indication of therapy (community- versus hospital-acquired infection or prophylaxis), whether the treatment was based on a Point-of-Care test, Rapid Diagnostic Test or biomarker and whether local guidelines are available for the prescribed treatment.

Denominator data are the number of patients that visited the department in the surveyed timeslot on the day of the PPS.