Table 2.

 Variation Measures Applied to Nonadjusted Patient Safety Indicator Rates, and Rates Adjusted by the Mean Number of Secondary Diagnoses, across 15 Participating OECD Countries

	Age–Sex Standardized Rates		Adjusted Age–Sex Standardized Rates
	Ratio between highest and lowest PSI rate	Coefficient of variation	Ratio between highest and lowest PSI rate	Coefficient of variation
Catheter-related bloodstream infection	84.94	99	16.10	76
Postoperative pulmonary embolism (PE) or deep vein thrombosis (DVT)	12.66	66	8.80	43
Postoperative sepsis	11.51	86	9.18	65
Accidental puncture or laceration	31.00	69	9.52	58
Foreign body left in during procedure	6.18	53	4.06	47