Table 1.

Severity and Preventability of Adverse Events Identified Using the Global Trigger Tool across Eight Baylor Health Care System Acute Care Hospitals (January 2007–December 2011)

			Hospital Acquired
	Total*	Present on Admission	Care Provided	Indicated Care Omitted	Unable to Determine
Severity†
E	1,572	223	1,194	70	84
F	1,625	1,021	516	37	51
G	33	14	16	0	3
H	153	28	106	7	12
I	47	14	22	2	9
Preventability‡
Preventable	68	23	30	14	1
Probably preventable	550	306	190	48	5
Possibly preventable	2,030	810	1,098	52	70
Not preventable	675	113	503	2	57
Unable to determine	107	48	33	0	26
Total	3,430	1,300	1,854	116	159

^*Includes one AE for which it could not be determined if it was “hospital acquired” or “present on admission.”

^†NCC MERP classifications: E = temporary harm that required intervention; F = temporary harm that required initial or prolonged hospitalization; G = permanent harm; H = intervention required to sustain life; I = death.

^‡Based on the reviewer’s clinical knowledge, he/she feels the AE was as follows: definitely preventable (Preventable); more likely than not the AE could have been prevented (Probably Preventable); there is some chance the AE could have been prevented (Possibly Preventable); the event was definitely not preventable (Not Preventable); not able to be assigned to any of the categories of preventability (Unable to Determine).