Capsule 13C-urea breath test for the diagnosis of Helicobacter pylori infection

Table 1 Comparison of data from 100- and 50-mg capsule UBT at different time points.

Method	2 min	4 min	6 min	8 min	10 min	15 min	20 min	25 min	30min
100-mg H pylori (+)	4.15 (5.33)b	9.8 (11.02)b	13.29 (11.73)b	16.82 (14.03)b	19.37 (15.55)b	22.13 (14.89)ab	23.57 (17.63)ab	20.63 (15.23)ab	20.07 (15.29)ab
UBT H pylori (-)	0.39 (1.08)	0.32 (0.58)	0.45 (1.66)	0.29 (1.32)	0.48 (1.42)	0.31 (1.05)	0.42 (1.08)	0.35 (0.87)	0.53 (0.9)
50-mg H pylori (+)	1.8 (1.81)b	6.63 (5.39)b	9.95 (7.01)b	11.68(7.48)b	12.17(7.59)b	12.79(7.29)b	13.17 (8)b	12.56 (8.02)b	11.62 (6.75)b
UBT H pylori (-)	0.04 (0.33)	0.04 (0.29)	0.04 (0.31)	-0.01 (0.33)	0.01 (0.31)	-0.08 (0.35)	0.1 (0.46)	0.02 (0.39)	0.02 (0.42)

Values are in excess δ¹³CO₂ excretion‰: mean±SD.

^aP<0.05 (100-mg UBT H pylori (+) vs 50-mg UBT H pylori (+)),

^bP<0.01 (H pylori (+) vs H pylori (-)).