Self-reported dietary fructose intolerance in irritable bowel syndrome: Proposed diagnostic criteria

Figure 1 Scale and precision of the subjective global assessment measure. At 4 wk, the change in VAS registration (compared to pre-registration values) was calculated. Box and whiskers plot of VAS change in the different subcategories of SGA at 4 wk. It is noted that the scale is not entirely linear, with best discrimination in the left part of the plot, while the right part shows smaller VAS differences between groups. SGA: Subjective global assessment; VAS: Visual analog scale.

Figure 2 Subjective global assessment of irritable bowel syndrome-related symptoms during the whole study. Mean registration (95%CI) for study groups. The control group showed stable mean value during the 2 + 12 wk registration. The mean effect of FRD was marked, showing stable improvement of symptom rating during the whole study. The SGA ratings were: 1: Completely relieved; 2: Considerably relived; 3: Somewhat relieved; 4: Unchanged; 5: Worse. FRD: Fructose-reduced diet; SGA: Subjective global assessment; IBS: Irritable bowel syndrome.

Figure 3 Visual analog scale registrations of irritable bowel syndrome-related symptoms during the first 2 + 4 wk. Mean registration (95%CI) for the study groups. FRD: Fructose-reduced diet; VAS: Visual analog scale; IBS: Irritable bowel syndrome.