Table 4 Definition of OPAT Outcomes, The British Society for Antimicrobial Chemotherapy Outpatient Parenteral Antimicrobial Therapy National Outcomes Registry System (NORS) User Guide, Section 3.8, Table 2 OPAT Outcomes [11]

Success

Completed therapy in OPAT with no change in antimicrobial agent, no adverse events, cure or improvement of infection and no readmission

Partial Success

Completed therapy in OPAT with either change in antimicrobial agent or adverse event not requiring admission

Failure of OPAT

Readmitted due to infection worsening or due to adverse event. Death due to any cause during OPAT

Indeterminate

Readmission due to unrelated event e.g. chest pain