Table 1.

Search terms and results.

Database	Search strategy	Results
Web of science	(TS=(“gynecological surgery” OR “gynecologic surgery” OR “gynecologic surgical procedures” OR “gynecologic surgical procedure” OR “gynecological surgical procedure” OR “gynecological surgical procedures” OR “complete staging surgery” OR “comprehensive staging surgery” OR “modified hysterectomy” OR “salpingo-oophorectomy” OR “radical hysterectomy” OR “hysterectomy” OR “laparotomy” OR “adnexal surgery” OR “uterine surgery”) ) AND (TS=(“gum chewing” OR “chewing gum” OR “gum” OR “gums” OR “sham feeding”))	61
Scopus	ALL(“gynecological surgery” OR “gynecologic surgery” OR “gynecologic surgical procedures” OR “gynecologic surgical procedure” OR “gynecological surgical procedure” OR “gynecological surgical procedures” OR “complete staging surgery” OR “comprehensive staging surgery” OR “modified hysterectomy” OR “salpingo-oophorectomy” OR “radical hysterectomy” OR “hysterectomy” OR “laparotomy” OR “adnexal surgery” OR “uterine surgery”) AND ABS(“gum chewing” OR “chewing gum” OR “gum” OR “gums” OR “sham feeding”) AND PUBYEAR AFT 2000	108
Cochrane Central Register of Controlled Trials (Cochrane database)	ALL Text ((“gynecological surgery” OR “gynecologic surgery” OR “gynecologic surgical procedures” OR “gynecologic surgical procedure” OR “gynecological surgical procedure” OR “gynecological surgical procedures” OR “complete staging surgery” OR “comprehensive staging surgery” OR “modified hysterectomy” OR “salpingo-oophorectomy” OR “radical hysterectomy” OR “hysterectomy” OR “laparotomy” OR “adnexal surgery” OR “uterine surgery”) AND (“gum chewing” OR “chewing gum” OR “gum” OR “gums” OR “sham feeding”))	53
EBSCO	TX (“gynecological surgery” OR “gynecologic surgery” OR “gynecologic surgical procedures” OR “gynecologic surgical procedure” OR “gynecological surgical procedure” OR “gynecological surgical procedures” OR “complete staging surgery” OR “comprehensive staging surgery” OR “modified hysterectomy” OR “salpingo-oophorectomy” OR “radical hysterectomy” OR “hysterectomy” OR “laparotomy” OR “adnexal surgery” OR “uterine surgery”) AND SU (“gum chewing” OR “chewing gum” OR “gum” OR “gums” OR “sham feeding”)	68
Pubmed	(“Chewing Gum”[MeSH Terms] OR (“gum chewing”[All Fields] OR “gum”[All Fields] OR “gums”[All Fields] OR “sham feeding”[All Fields])) AND (“Gynecologic Surgical Procedures”[MeSH Terms] OR “hysterectomy”[MeSH Terms] OR “salpingo oophorectomy”[MeSH Terms] OR (“gynecological surgery”[All Fields] OR “gynecologic surgery”[All Fields] OR “gynecologic surgical procedure”[All Fields] OR “gynecological surgical procedure”[All Fields] OR “gynecological surgical procedures”[All Fields] OR “complete staging surgery”[All Fields] OR “comprehensive staging surgery”[All Fields] OR “modified hysterectomy”[All Fields] OR “radical hysterectomy”[All Fields] OR “laparotomy”[All Fields] OR “adnexal surgery”[All Fields] OR “uterine surgery”[All Fields]))	64
Medline (via Ovid)	(gynecological surgery or gynecologic surgery or gynecologic surgical procedures or gynecologic surgical procedure or gynecological surgical procedure or gynecological surgical procedures or complete staging surgery or comprehensive staging surgery or modified hysterectomy or salpingo-oophorectomy or radical hysterectomy or hysterectomy or laparotomy or adnexal surgery or uterine surgery).af. AND (gum chewing or chewing gum or gum or gums or sham feeding).af. AND limit 3 to yr=”2000-Current”	44
CNKI	FT = (“gum chewing” OR “gum” OR “sham feeding”)) AND FT = (“gynecological surgery” OR “complete staging surgery” OR “modified hysterectomy” OR “salpingo-oophorectomy” OR “radical hysterectomy” OR “hysterectomy” OR “laparotomy” OR “adnexal surgery” OR “uterine surgery”))	299
Wan Fang	(TS: (“gum chewing” OR “gum” OR “sham feeding”)) AND (TS: (“gynecological surgery” OR “complete staging surgery” OR “comprehensive staging surgery” OR “modified hysterectomy” OR “salpingo-oophorectomy” OR “radical hysterectomy” OR “hysterectomy” OR “laparotomy” OR “adnexal surgery” OR “uterine surgery”))	49
China Science and Technology Journal Database	(M=(“gum chewing” OR “chewing gum” OR “gum” OR “gums” OR “sham feeding”)) AND (M = (“gynecological surgery” OR “complete staging surgery” OR “comprehensive staging surgery” OR “modified hysterectomy” OR “salpingo-oophorectomy” OR “radical hysterectomy” OR “hysterectomy” OR “laparotomy” OR “adnexal surgery” OR “uterine surgery”))	91

SU, subject; TS, topic; ABS, abstract; SU, research area; FT, full text; TX, text; M, title or keyword, CNKI, Chinese National Knowledge Infrastructure.