Table 6 Measurement of the agreement by kappa value and comparison between the observed CT accuracy and the expected accuracy done by operation approach
From: Role of MSCT in the diagnosis of perforated gall bladder (a retrospective study)
| Â | CT gall bladder perforation classification | Total | |||
CT-classified type I | CT-classified type II | Â | |||
Gall bladder perforation classification made based on operative findings | Operation-classified type I | Count | 5 | 0 | 5 |
% within gall bladder perforation classification made based on operative findings | 100.0% | 0.0% | 100.0% | ||
% within CT gall bladder perforation classification | 100.0% | 0.0% | 26.3% | ||
Operation-classified type II | Count | 0 | 14 | 14 | |
% within gall bladder perforation classification made based on operative findings | 0.0% | 100.0% | 100.0% | ||
% within CT gall bladder perforation classification | 0.0% | 100.0% | 73.7% | ||
Total | Count | 5 | 14 | 19 | |
% within gall bladder perforation classification made based on operative findings | 26.3% | 73.7% | 100.0% | ||
% within CT gall bladder perforation classification | 100.0% | 100.0% | 100.0% | ||
Symmetric measures | |||||
| Â | Value | Asymp. Std. Errora | Approx. Tb | Approx. Sig. | |
Measure of Agreement | Kappa | 1.000 | 0.000 | 4.359 | 0.001 |
N of valid cases | 19 | Â | Â | Â | |