Diagnostic yield of endoscopy in patients with abdominal complaints: incremental value of faecal calprotectin on guidelines of appropriateness

Table 5 Reclassification of patients with normal and clinically significant findings undergoing colonoscopy by means of faecal calprotectin measurement

Colonoscopy	Endoscopic findings probability model 2 including EPAGE criteria and faecal calprotectin values
Colonoscopy	Probability of findings	<30%	30-50%	>50%	Total
Endoscopic finding probability model 1 including EPAGE criteria	No findings
	<30%	25	1	1	27
	30-50%	100	13	10	123
	>50%	0	0	0	0
	Total	125	14	11	150
	Significant findings
	<30%	4	0	6	10
	30-50%	11	10	43	64
	>50%	0	0	0	0
	Total	15	10	49	74

Amongst patients with normal colonoscopy, 100 patients (66.7%) were correctly reclassified as at lower risk for endoscopic lesions and 12 patients (8.0%) were incorrectly reclassified as at higher risk. Amongst patients with significant findings at colonoscopy, 49 patients (66.2%) were correctly reclassified as at higher risk of endoscopic findings and 11 patients (14.9%) were incorrectly reclassified as at lower risk. The calculated NRI was 110.9% (P <0.001).

ISSN: 1471-230X