Table 2.

Reproducibility of Breath Methane Concentrations Under the Fasted Condition and after a 10-g Per-oral (p.o). Load of Lactulose

CH_{4_bas}, basal fasted methane; max CH_{4_net}, maximum net increment over baseline in methane after peroral lactulose intake; AUC CH_{4_net}, area under the curve of the net increment of methane; STR, short term reproducibility with a median time gap of 3 days (range 1-3) between repeat sessions; MTR, medium term reproducibility with examinations separated by a median of 17 days (range 16-21); Δ, difference between repeat examinations (mean±SE); CV_p, coefficient of variation for paired examinations; RC, Bland and Altman repeatability coefficient.