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

Table 3 Intraclass correlation coefficients for baseline characteristics of the sample selected from 14 hospitals

Variable	ICC	95% CI
Age*	0.025	0.000-0.102
Disease Severity at Admission (NHYA)^†	0.046	0.007-0.145
Admitted from Home or Referred by GP^†	0.058	0.000-0.128
Co-morbidities^†	0.027	0.000-0.066
Hypertension^†	0.043	0.000-0.101

DE: Design effect, GP: General practitioner, COPD: Chronic obstructive pulmonary disease, NYHA: New York Heart Association; CI: confidence interval.
*Ordinal or Continuous variables.
^†Binary variables.

ISSN: 1472-6963