Table 1.

Patient characteristics. There are no significant differences in the main characteristics or demographics between the groups of functional GI disorders

	All functional GI disorders	Irritable bowel syndrome†	Functional dyspepsia†	Functional bloating†
Number of patients	1372	212	606	109
Age (years)*	42 ± 16	38 ± 16	40 ± 13	48 ± 15
Gender (% female)	73	77	73	62
Symptom duration (years)*	5.9 ± 5	7.2 ± 6	5.2 ± 5	5.6 ± 6
BMI (kg/m2)*	23.5 ± 5	24.1 ± 4	23.4 ± 5	22.1 ± 6

^*Mean ± s.d.

^†Subgroups of functional GI disorders as defined by the Rome III criteria.⁹