Fig. 2. Forest plot and funnel plot of depression levels in irritable bowel syndrome (IBS) patients. (A) Forest plot of depression levels in IBS patients, divided by the type of questionnaire assessing depression levels. (B) Funnel plot of depression levels in IBS patients, divided by the type of questionnaire assessing depression levels. SMD, standard mean difference; BDI, Beck Depression Inventory; HADS, Hospitalization Anxiety and Depression Scale; SDS, Self-Rating Depression Scale; Others included sphere and Symptom Checklist-90; SE, standard error.
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