Table 3:
Specificities, sensitivities, percentage of correctly classified patients, and the likelihood ratios of the markers correlating significantly with infectious colon perforation.
Marker
Sensitivity
Specificity
Correctly classified
Likelihood ratio +
Likelihood ratio −
Fever (>37.5°C)
28%
87%
66%
2.2
0.8
Tachycardia (>100 bpm)
21%
91%
65%
2.4
0.9
Hyponatremia (<136 mmol/L)
31%
79%
61%
1.5
0.9
Markedly elevated CRP (>50 mg/L)
80%
40%
54%
1.3
0.5
Leukocytosis (>10/nL)
74%
39%
51%
1.2
0.7