Update on diagnostic value of breath test in gastrointestinal and liver diseases

Table 2 Comparison of the 14C and 13C urea breath test

	14C-UBT	13C-UBT
Test performed at	Nuclear medicine department	No specific location required
Analysis	Specialized nuclear medicine department and β-scintillation counters	Mass spectrometry analysis (in a hospital or mailed to the manufacturer)
Radioactive hazard	Yes	No
Patient selection	Not suitable for children or pregnant women	Safer for children or pregnant women

UBT: Urea breath test; 14C: 14 carbon; 13C: 13 carbon.