Table 1.

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

H_{2_bas}, basal fasted hydrogen; max H_{2_net}, maximum net increment over baseline in hydrogen after peroral lactulose intake; AUC H_{2_net}, area under the curve of the net increment of hydrogen; 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.