Table 1.

Frequency of patients for each symptom at baseline (T0). M=males; F=females, Mean age in years

N=612	T0
	n	%	M/F	Mean age
Abdominal pain	503	82.2%	282/221	58
Abdominal bloating	464	75.8%	253/211	58
Flatulence	421	68.8%	241/180	58
Borborygmi	352	57.5%	199/153	57
Eructation	325	53.1%	176/149	57
Malaise	206	33.7%	116/90	60
Weakness	140	22.9%	84/56	61
Headache	43	7.0%	26/17	57