. Author manuscript; available in PMC: 2013 Jun 12.

Published in final edited form as: BMJ Qual Saf. 2011 Oct 13;21(2):93–100. doi: 10.1136/bmjqs-2011-000304

Table 1. Rationale of Trigger Modifications from Previous Work²⁴.

Trigger Characteristics	Previous trigger	New trigger	Rationale
Time period	10 days	14 days	Previous findings showed that diagnostic errors continued to be discovered at the 10 day cut-off.
Inclusion criteria	Did not account for planned hospitalizations or elective surgeries	Electronically excludes planned or elective admissions related to (or from) day surgery, scheduled ambulatory admit, pre-operative clinics, cardiology invasive procedure clinic	Lower proportion of triggered false positives will increase PPV as well as efficiency of record reviews.
	Did not account for admissions to units considered “non-acute”	Electronically excludes admissions to long term and intermediate care, and rehabilitation units
	Included all hospitalizations	Includes only hospitalizations electronically designated as “acute care” (e.g. acute medicine, acute surgery, acute mental health)

Table 1. Rationale of Trigger Modifications from Previous Work24.