Fig. 1.

Willingness to participate in randomized controlled trials of OBS for ovarian cancer prevention (%). While only 6.8% of all institutions were willing to participating in randomized trials, 19.1% hoped to participate in a cohort study. However, 25.2% had no plans to be involved in a study and 48.9% gave a reply of “unknown.” We also examined the willingness to participate in trials depending on the accreditation status of the institutions. Although 17.8% of institutions accredited by both the JSGO and JSGOE were willing to participate in randomized controlled trials of OBS, the rate was only 3.2% among JSGO-accredited institutions, which preferred cohort studies (34.9%). Also, only 4.4% of unaccredited institutions were willing to participate (p<0.001). The level of willingness to participate in randomized controlled trials of OBS for ovarian cancer prevention is related to accreditation status.

JSGO, Japan Society of Gynecologic Oncology; JSGOE, Japan Society of Gynecologic of Obstetric Endoscopy and Minimally Invasive Therapy; OBS, opportunistic bilateral salpingectomy.