Table 1.

Screening criteria and number of medical records showing evidence of one category of adverse event

Criteria	n	%
Hospital-incurred patient injury	101	22.4
Unplanned readmission after discharge from index admission (12 months)	81	18.0
Unplanned admission related to previous healthcare management	43	9.5
Hospital-acquired infection or sepsis	40	8.7
Adverse drug reaction	31	6.9
Unplanned return to the operating room	29	6.4
Any other undesirable outcomes not covered in this list of criteria	28	6.2
Unexpected death	20	4.4
Unplanned transfer from general care to intensive care	17	3.8
Other patient complications	16	3.5
Cardiac or respiratory arrest	14	3.2
Unplanned removal, injury or repair of an organ during surgery	10	2.2
Unplanned transfer to another acute care hospital	6	1.3
Development of neurological deficit not present on admission	6	1.3
Inappropriate discharge to home	6	1.3
Dissatisfaction or correspondence indicating litigation	2	0.44
Injury related to abortion or delivery	1	0.22
Dissatisfaction with care documented in the patient’s medical record	0	0.0
Total	451	100%

The criteria are not mutually exclusive; i.e. one patient can have more than one criterion (in 365 positive medical records there were 451 criteria).