Meta-analysis of single strain probiotics for the eradication of Helicobacter pylori and prevention of adverse events

Figure 1 Standardized data extraction form. Scoring: For each of 33 items: +1 if numbered item is present, 0 if absent, or na (not applicable).

Figure 2 Flow chart of included and excluded trials for Helicobacter pylori eradication/adverse events. RCT: Randomized controlled trials.

Figure 3 Forest plot of Helicobacter pylori eradication by probiotic strain.

Figure 4 Forest plot of any adverse events by probiotic strain.

Figure 5 Forest plot of prevention of antibiotic-associated diarrhea by probiotic strain.

Figure 6 Funnel plot for publication bias assessment from for Helicobacter pylori eradication and probiotics.

Figure 7 Funnel plot for publication bias assessment from for prevention of antibiotic associated diarrhea and probiotics.

Figure 8 Frequency of study quality based on six different types of potential bias. High quality, low bias (76%-100% quality items within category present), moderate quality and moderate bias (51%-75% items present), low quality, high bias (0%-50% items present).