Table 1.

Agreement between [¹³C]UBT and monoclonal stool test results for diagnosis of H. pylori infection in infants and toddlers according to the different [¹³C]UBT cutoff points^a

Cutoff (‰)	No. of discordant results		No. (%) of results in agreement	Kappa coefficient	95% CI
	+UBT/−SAT	−UBT/+SAT
3.5	77	21	1,225 (92.59)	0.85	0.82–0.88
4.0	45	23	1,255 (94.86)	0.90	0.87–0.92
5.0	120	18	1,185 (89.57)	0.79	0.76–0.82
6.0	191	14	1,118 (84.50)	0.69	0.65–0.73

^an = 1,323. ‰, DOB (delta over baseline); +UBT, positive urea breath test; −UBT, negative urea breath test; +SAT, positive stool antigen test; −SAT, negative stool antigen test. Kappa coefficient was calculated according to Cohen's statistic (18).