Cronbach’s alphas for the subscales in this specific sample of
critical care nurses ranged from 0.89 (Nurse Foundations for
Quality Care) to 0.94 (Collegial Nurse-Physician Relations).
ICCs (1, k) were calculated for the composite measure, with
and without the Staffing and Resource Adequacy subscale, and
the resultant values (0.71 and 0.69, respectively) were, in both
cases, above the generally accepted level of 0.60 (26, 27).