Skip to main content
. 2018 Jun 6;73(Suppl 6):vi50–vi58. doi: 10.1093/jac/dky118

Table 3.

The final set of 12 evidence-based and consensually validated quantity metrics for antibiotic use in the inpatient setting

Inpatient quantity metric (IQM)
IQM 1: Defined daily doses (DDDs) per 100(0) PDs/BDs/OBDsa
IQM 2: Defined daily doses (DDDs) per admission
IQM 3: Defined daily doses (DDDs) per (100 bed-days per CMIb)
IQM 4: Prescribed daily doses (PDDs) per 100 PDs
IQM 5: Days of therapy (DOT) per PD
IQM 6: Days of therapy (DOT) per patient
IQM 7: Days of therapy (DOT) per admission
IQM 8: Length of therapy (LOT) per admission
IQM 9: Length of therapy (LOT) per patient
IQM 10: Patients exposed to antibiotics per all patients
IQM 11: Patients exposed to antibiotics per admission
IQM 12: Antibiotic use should be preferably expressed in at least two metrics simultaneously
a

100(0) patient-days (PD)/bed-days (BDs)/occupied bed-days (OBDs).

b

CMI, case mix index. This is a relative value assigned to a diagnosis-related group of patients in a medical care environment.