‘Detected’ should be answered as “RF”. Per the Instructions for Completion of Surgical Site Infection (SSI) Form (CDC 57.120) definition for ‘Event Details: Detected’: Check RF if SSI was identified due to patient readmission to the facility where the procedure was originally performed. Check “RF” regardless of readmission to a prior facility. See the SSI event Table of Instructions [PDF – 500 KB] ‘Event Details: Detected’ for complete guidance.