Table 2

Rates of patient safety events per 1000 discharges (HCUP Nationwide Inpatient Sample, 2000), N = 7448149

Patient safety indicators	No of patient safety events	Risk pool	Event rate per 1000 discharges at risk
Complications of anesthesia	1369	1933085	0.71
Death in low mortality DRGs	1169	2797528	0.42
Decubitus ulcer	41440	1932676	21.51
Failure to rescue	56103	331738	169.13
Foreign body left in during procedure	536	6572845	0.09
Iatrogenic pneumothorax	3919	5861689	0.67
Infection due to medical care	11449	5752102	1.99
Postoperative hip fracture	1068	1397898	0.77
Postoperative hemorrhage or hematoma	3494	1695495	2.06
Postoperative physiological and metabolic derangements	799	801702	1.00
Postoperative respiratory failure	2275	633855	3.58
Postoperative thromboembolism	15704	1689662	9.34
Postoperative septicemia	2592	229853	11.25
Accidental puncture or laceration	11810	5628112	3.32
Transfusion reaction	30	6572845	0.004
Postoperative wound dehiscence	843	411099	2.05
Birth trauma - injury to neonate	4740	720021	6.53
Obstetric trauma (vaginal with instrument)	12518	51225	224.21
Obstetric trauma (vaginal without instrument)	51223	591752	86.61
Obstetric trauma (cesarean section)	1138	191227	6.97