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. 2013 Jul 1;347:f3675. doi: 10.1136/bmj.f3675

Table 3.

 Inadequate quality of conduct of the systematic review process with adequate reporting in network meta-analyses, by journal type

Item (reported and of inadequate quality of conduct) Overall General journal Specialty journal
Electronic search of only one bibliographic database 13/118 (11) 8/53 (15) 5/65 (8)
Restriction of study selection based on publication status 16/82 (20) 6/38 (16) 10/44 (23)
Lack of independent duplicate study selection 34/79 (43) 13/37 (35) 21/42 (50)
Lack of independent duplicate data extraction 19/89 (21) 10/41 (24) 9/48 (19)

Data are number (%)/total number of reports. Denominators of fractions indicate the total number of reports in which the corresponding item was reported.