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Table 3 Intraclass variance Rater 1 (CFS1) and Rater 2(CFS2); weighted kappa (linear) 0.86 (0.84–0.87)

From: Reliability of the Clinical Frailty Scale in very elderly ICU patients: a prospective European study

CFS 2 CFS 1
1 2 3 4 5 6 7 8 9 Sum %
1 76 3 0 1 1 0 0 0 0 81 (3.5%)
2 0 7 1 0 0 0 0 0 0 196 (14.0%)
3 2 40 403 25 7 2 0 1 0 480 (25.0%)
4 1 4 54 313 22 7 1 0 0 402 (20.9%)
5 0 0 10 58 163 28 2 0 1 262 (13.6%)
6 0 0 5 5 43 177 17 2 0 249 (12.9%)
7 0 0 0 1 2 44 126 8 0 181 (9.4%)
8 0 0 0 1 0 3 13 46 2 65 (3.4%)
9 0 0 0 0 0 0 0 0 7 7 (0.4%)
Sum % 94 (4.9%) 202 (10.5%) 493 (25.6%) 407 (21.2%) 240 (12.5%) 261 (13.6%) 159 (8.3%) 57 (3.0%) 10 (0.5%) 1923