Fig. 2.

Forest plot of the overall point prevalence of function disorders in regard to the country (with a number ≥ 10 studies per country) with 95% confidence intervals and prediction intervals in regard to the author, year of publication, and specific diagnosis. Note. CP Chronic pain, CFS Chronic fatigue syndrome, CWP Chronic widespread pain, FBLO Functional bloating, FBOW Functional bowel symptoms, FCON Functional constipation, FDIAR Functional diarrhea, FDYS Functional dyspepsia, FM Fibromyalgia, IBS Irritable Bowel Syndrome, LBP Low back pain, PAIN musculoskeletal pain, PP Pelvic pain, SOM Somatization, TTH Tension type headaches, WAD Whiplash associated disorder