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. 2016 Oct 3;12(5):3287–3293. doi: 10.3892/etm.2016.3763

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Copyright: © Zhang et al.

This is an open access article distributed under the terms of the Creative Commons Attribution-NonCommercial-NoDerivs License, which permits use and distribution in any medium, provided the original work is properly cited, the use is non-commercial and no modifications or adaptations are made.

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Figure 4. — Funnel plots and Egger's linear regression tests were performed to investigate the publication bias in the present meta-analysis, based on the (A) disease duration of IBD, (B) efficacy of corticosteroid therapy, (C) colectomy rate, (D) incidence of severe IBD, (E) incidence of pancolitis (disease location), and (F) the incidence of left-sided IBD (disease location), in CMV-positive and CMV-negative patients. IBD, inflammatory bowel disease; CMV, cytomegalovirus; SMD, standardized mean difference; SE RR, standard error of relative risk.