162 Chapter 7 We will only include video‐assisted laparoscopy, as this is less operator‐dependent. We will exclude studies on direct visualization laparoscopy or those using CO2‐pertubation or indigo carmine dye for tubal testing during laparoscopy, as well as the use of other dyes currently unknown to the authors. In addition, we will exclude studies with laparotomic tubal testing, and studies with another reference standard, for example using one of the index tests as the reference standard. Search methods for identification of studies Electronic searches In collaboration with the Cochrane Gynaecology and Fertility (CGF) Group’s Information Specialist, we will search the following electronic databases: • CENTRAL (Cochrane Central Register of Controlled Trials) via the Cochrane Register of Studies Online (CRSO), web platform, to search from 1968 to present (Supplementary Table 1); • MEDLINE, Ovid platform, to search from 1968 to present (Supplementary Table 2); • Embase, Ovid platform, to search from 1980 to present (Supplementary Table 3); • CINAHL (Cumulative Index to Nursing and Allied Health Literature; EBSCO platform, to search from 1968 to present (Supplementary Table 4). For each database, we will use both index and free terms, and synonyms related to: infertility, tubal pathology, hysterosalpingography, hydrolaparoscopy, MR‐HSG and sono‐ HSG. We will also search trial registries for trials comparing two or more index tests, and for other eligible observational studies. We will search ClinicalTrials.gov (clinicaltrials. gov/), International Standard Randomised Controlled Trial Number (ISRCTN) registry (www.isrctn.com/), and the World Health Organization (WHO) International Clinical Trials Platform (ICTRP) Search portal (apps.who.int/trialsearch/). As the reference test, laparoscopy with methylene blue dye tubal patency testing, was first reported in 1968 (33), we will use this as the earliest search date for those databases with an inception date prior to 1968. Searching other resources We will screen the reference lists of included studies and relevant systematic reviews for any additional trials. We will also search for ongoing and unpublished studies by approaching clinical experts and trialists in this field.
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