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Table 1 Screening criteria and number of medical records showing evidence of one category of adverse event

From: Estimating the incidence of adverse events in Portuguese hospitals: a contribution to improving quality and patient safety

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%
  1. 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).