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. Author manuscript; available in PMC: 2018 Jun 1.
Published in final edited form as: Surg Endosc. 2016 Oct 3;31(6):2509–2519. doi: 10.1007/s00464-016-5253-7

Table 6.

Weighted Kappa measuring the agreement between the 5-item mFI and 11-item mFI. A weighted Kappa of 1 implies a perfect agreement between the two scales. p value <0.05 suggests the observed agreement between the indexes is statistically significant

Frequency percent
Table of mFI by IILFI5
mFI (modified fragility index (11 pts possible)) mFI5 (modified fragility index (5 pts possible))
0 1 2 3 4 5 6 Total
0 759 0 0 0 0 0 0 759
43.08 0.00 0.00 0.00 0.00 0.00 0.00 43.08
1 21 691 0 0 0 0 0 712
1.19 39.22 0.00 0.00 0.00 0.00 0.00 40.41
2 3 79 144 0 0 0 0 226
0.17 4.48 8.17 0.00 0.00 0.00 0.00 12.83
3 0 9 32 9 0 0 0 50
0.00 0.51 1.82 0.51 0.00 0.00 0.00 2.84
4 0 0 8 4 0 0 0 12
0.00 0.00 0.45 0.23 0.00 0.00 0.00 0.68
5 0 0 0 0 2 0 0 2
0.00 0.00 0.00 0.00 0.11 0.00 0.00 0.11
6 0 0 0 0 1 0 0 1
0.00 0.00 0.00 0.00 0.06 0.00 0.00 0.06
Total 783 779 184 13 3 0 0 1762
44.44 44.21 10.44 0.74 0.17 0.00 0.00 100.00
Frequency missing = 5452

Weighted kappa = 0.8709, CI 0.8530–0.8888, p < 0.0001