Figure 2
From: Methane breath tests and blood sugar tests in children with suspected carbohydrate malabsorption
Time course analysis of endexpiratory hydrogen (H2) and methane (CH4) concentrations during hydrogen/methane breath tests (HBT/MBT) performed in children with suspected carbohydrate malabsorption. Shown are the hydrogen (a,c) and methane (b,d) concentrations during breath tests performed with fructose (a,b) and lactose (c,d). A positive HBT (H2 positive) was defined by an increase of H2 ≥ 20 ppm at 30/60/90/120 /150/180 min after administering of the respective test sugar solution. A CH4 concentration ≥ 10 ppm at any measurement was considered as a positive MBT (CH4 positive). Patients with an elevated baseline value (0 min: H2 > 20 ppm/CH4 ≥ 10 ppm) were excluded. Error bars at any given time are showing the standard error of the mean.
