Comparison of survival between primary debulking surgery and neoadjuvant chemotherapy for stage III/IV ovarian, tubal and peritoneal cancers in phase III randomised trial.

•Survival noninferiority of NACT compared to PDS was not confirmed in this study.•Noninferiority of the previous studies cannot be denied because of smaller numbers.•There seems to be diversity in the efficacy of PDS/NACT among subgroups of patients.