“…We identified several categories of interventions under study. These included carbon dioxide (CO 2 ) (13.9%, 34 and 245) and water insufflation methods (16.7%, 41 and 245), colonoscope technology (21.6%, 53 of 245; eg, responsive insertion technology26), complementary and alternative medicines (20.0%, 49 of 245; eg, acupuncture27), patient and endoscopist positioning (5.3%, 13 of 245; eg, right-sided patient position28), patient education (2.4%, 6 of 245), postprocedure care (2.9%, 7 of 245; eg, rectal decompression29) and others (13.9%, 34 of 245). Complementary and alternative medicines included acupuncture (6 studies), aromatherapy (5 studies), audiovisual distraction (27 studies), relaxation techniques (7 studies) and transcutaneous electrical nerve stimulation (4 studies).…”