Table 10.

PPV and NPV of faecal calprotectin dependent upon the normal range

Threshold for ‘normal’ faecal calprotectin	NPV	PPV
<50	0.964	0.771
<60	0.957	0.813
<75	0.934	0.860
<100	0.911	0.909

NPV, negative predictive value; PPV, positive predictive value.