The Association between Periodontitis and Inflammatory Bowel Disease: A Systematic Review and Meta-analysis

Table 1

Inclusion and exclusion criteria for published studies.

Inclusion criteria	Exclusion criteria
a) Studies on human subjects; b) Cohort or case-control studies including patients with known IBD diagnoses and no IBD; c) Studies using periodontitis as a primary observation; d) Studies reporting an estimated measure of effect size ([RR], [HR], or [OR]) and its associated 95% confidence interval (CI) or those providing calculable data	a) Case reports; b) Reviews; c) Animal studies; d) Articles without available abstracts; e) Duplicated studies