Table 2.

Frequency of symptom-specific sensitivity responses (≥20 mm VAS increase within 180 min) during the lactose hydrogen breath test in patients with FD and FD-IBS overlap

Symptom	FD (n = 222), n (%)	FD-IBS (n = 162), n (%)	p value
Pain	55 (24.8%)	64 (39.5%)	0.002
Nausea	48 (21.6%)	48 (29.6%)	0.073
Bloating	65 (29.3%)	53 (32.7%)	0.471
Flatulence	70 (31.5%)	58 (35.8%)	0.381
Diarrhoea	46 (20.7%)	37 (22.8%)	0.618

Data are presented as n (%).

VAS, visual analogue scale.

p values are based on Pearson’s chi-square tests comparing FD and FD-IBS groups.