Modified Helicobacter test using a new test meal and a 13C-urea breath test in Helicobacter pylori positive and negative dyspepsia patients on proton pump inhibitors

Table 5 Specificity of the ¹³C-urea breath test using the new test meal for Helicobacter pylori n (%)

Population	Result of UBT with new test meal	Diagnosis of Hp infection		Specificity	95%CI
		Positive	Negative
ITT (n = 114)	Positive	50 (78.1)	1 (2.0)	96.00%	86.29%-99.51%
	Negative	13 (20.3)	48 (96.0)
	Not performed	1 (1.6)	1 (2.0)
PP (n = 102)	Positive	49 (92.5)	1 (2.0)	97.96%	89.15%-99.95%
	Negative	4 (7.5)	48 (98.0)

UBT: Urea breath test; ITT: Intention-to-treat; PP: Per-protocol; Hp: Helicobacter pylori.