From: Utility and reliability of the Clinical Frailty Scale in patients scheduled for major vascular surgery: a prospective, observational, multicentre observer-blinded study
Paired background
Percentage agreement P(a)
Kappa statistics (k)
Z
P value
Researcher EFS and consultant CFS
87.6%
0.53
0.52
< 0.001
Researcher EFS and nurse CFS
0.50
4.92
Consultant CFS and nurse CFS
89.7%
0.61
5.99