Table 3

Rankability

Indicator	σ²	τ²	95% range OR		Rankability
Indicator	σ²	τ²	−	+	Rankability
Nosocomial pressure ulcer prevalence	0.19	0.11	0.52	1.91	37%
Nosocomial pressure ulcer incidence after total hip replacement	0.85	0.16	0.46	2.17	38%
Leakage of the bile duct within 30 days of cholecystectomy	1.01	0.00	1	1	0%
Unintended reoperation after colorectal surgery	0.12	0.29	0.35	2.86	71%
In-hospital mortality after AMI, age groups combined^*	0.19	0.27	0.36	2.76	58%
Readmission after heart failure, age groups combined^*	0.14	0.15	0.47	2.11	51%
Remaining cancer tissue after breast-saving lumpectomy	0.25	0.28	0.35	2.82	53%