The internal consistency of the nursing intervention scale focusing on informational support of TBI patients’ family members, as tested with Cronbach’s alpha coefficient, was good at 0.94, while the values of the nursing intervention sum variables ranged from 0.74 to 0.90. Competence sum variables ranged from
0.66 to 0.85, and the value for the whole scale was 0.90 (Bakas et al, 2006; Shyu et al, 2006). The reliability of the results was assured by including all university hospital neurosurgical wards on which TBI patients are treated in Finland. However, the small sample size must be taken into account.