Association between Helicobacter pylori infection and migraine: A meta-analysis

Figure 1 Flow diagram of the study selection process. H. pylori: Helicobacter pylori.

Figure 2 Meta-analysis of the prevalence of Helicobacter pylori infection in the migraine group compared with the control group. Weights are from random effects analysis.

Figure 3 Sensitivity analysis of the five included studies.

Figure 4 Forest graph of Helicobacter pylori infection. Weights are from random effects analysis. A: Stratified by geographic distribution; B: Stratified by the quality of evidence for each included study; C: Stratified by the publication year.

Figure 5 Funnel plot to detect publication bias.