“…Even though mortality related to the ambulatory surgical setting is rare, this indicator has been used to flag potential quality problems associated with ambulatory surgery [6,7,9,25]. Other researchers have also used mortality as an outcome for comparing quality of care provided in the outpatient setting [8,12,26,27]. We used 7-day indicators since, as a shorter measure, it can reduce the effects of extraneous factors unrelated to outpatient procedures [6].…”