Table 2Exclusion criteria and the number of hospitals and discharges excluded

Exclusion CriteriaHospitals ExcludedaDischarges Excludeda
NumberPercentNumberPercent
Hospitals that reported all diagnoses and E codes as being present on admission481.147,1040.2
Hospitals with 20 percent or more discharges with a missing present on admission indicator for nonmissing diagnoses or E codes1,76838.88,619,77628.6
Hospitals that only coded present on admission for Medicare patients50.13,1400.0
Discharges with missing present on admission information for nonmissing diagnoses or E codesn/an/a1,309,2984.3
a

Some excluded hospitals and discharges are counted more than once, as a function of meeting more than one exclusion criteria.

From: Origin of Adverse Drug Events in U.S. Hospitals, 2011

Cover of Healthcare Cost and Utilization Project (HCUP) Statistical Briefs
Healthcare Cost and Utilization Project (HCUP) Statistical Briefs [Internet].

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