Table 1.

Demographic and testing results of breath tests for sucrose malabsorption in patients presenting with “functional” gastrointestinal symptoms

Breath test	Patients tested (n)	Average age years (range)	Positive result
Hydrogen-methane for sucrose malabsorption (Commonwealth Diagnostics)	61	45.8 (21–82)	21 (34.4%)
Male	10	50 (33–66)	1 (10%)
Female	51	45 (21–82)	20 (39.2%)
Hydrogen-methane for sucrose intolerance (Aerodiagnostics)	50	47.2 (22–79)	20 (40%)
Male	8	45 (23–76)	5 (62.5%)
Female	42	48 (22–79)	15 (35.7%)
13C-sucrose breath test (Metabolic Solutions)	147	40.3 (18–83)	39 (26.5%)
Male	29	41 (19–71)	6 (20.6%)
Female	118	40 (18-83)	33 (28%)