Intraclass correlation coefficients for cluster randomized trials in care pathways and usual care: hospital treatment for heart failure

Table 4 Intraclass correlation coefficients for the outcomes variables of study

	Usual care		Care pathways
Outcome variables	ICC	95% CI	ICC	95% CI
LOS (days)*	0.020	0.000-0.184	0.063	0.007-0.311
Cost (€)*	0.046	0.001-0.265	0.001	0.000-0.107
In-hospital mortality^†	0.001	0.000-0.003	0.001	0.000-0.003
Disease Severity at Discharge (NYHA)^†	0.182	0.062-0.554	0.000	0.000-0.076
AOS^†	0.203	0.059-0.436	0.069	0.003-0.155
Unscheduled readmission^†	0.004	0.000-0.036	0.010	0.000-0.046

DE: Design effect, AOS: Appropriateness of the stay, NYHA: New York Heart Association, CI: confidence interval.
*Ordinal or Continuous variable.
^†Binary variables.

ISSN: 1472-6963