Table 5.

Amount of variability in vasopressin use explained by patient and hospital characteristics

	Quotient of AICs
Patient characteristics	0.56
Hospital characteristics	0.001
Individual hospital	0.37

Definition of abbreviation: AIC = Akaike information criteria.

Quotient of AICs = (AICfull − AICreduced)/(AICfull − AICnull), where AICfull = AIC for the multivariable multilevel logistic model including all patient-level, hospital-level, and clustering variable information; AICreduced = AIC for the multivariable multilevel logistic model excluding one of the variable sets; AICnull = AIC for the multivariable multilevel logistic model, including no independent variables or clustering (29, 30).