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Table 1 Bibliographical characteristics of the 106 included systematic reviews on acupuncture

From: Low methodological quality of systematic reviews on acupuncture: a cross-sectional study

Bibliographical characteristics Results*
Cochrane review 5 (4.7)
An update of previous review 19 (17.9)
 An update of previous Cochrane review 3 (2.8)
 An update of a previous non-Cochrane review 16 (15.1)
Publication journal impact factor median (range) 2.0 (0–6.8)
Number of review authors median (range) 6 (2–13)
Location of corresponding author
 Europe 4 (3.8)
 America 7 (6.6)
 Asia 93 (87.7)
 Oceania 2 (1.9)
Number of primary studies included in SRs
 Total 1864
 Median (range) 13.5 (3–73)
Number of participants enrolled in the primary studies of SRs
 Total 204,784
 Median (range) 1238 (178–20,827)
SRs reporting intervention harms 76 (71.7)
Funding location of the SR
 Europe 4 (3.8)
 America 4 (3.8)
 Asia 66 (62.3)
 Not reported 8 (7.5)
 No funding support 24 (22.6)
SRs that searched English databases 105 (99.1)
SRs that searched non-English databases 88 (83.0)
Report year span of search
 Yes, reported both starting and ending years 81 (76.4)
 Partially, only reported starting years 19 (17.9)
 Not mentioned 6 (5.7)
Search terms reported for one or more electronic databases
 Topics/free text/keywords/MeSH 47 (44.3)
 Full Boolean 54 (50.9)
 Readers are referred elsewhere for full search strategy 0 (0)
 No research term 5 (4.7)
Language of included primary studies in SRs
 English only 9 (8.5)
 Language other than English 6 (5.7)
 English and other languages 32 (30.2)
Not reported 59 (55.7)
Risk of bias assessment tools
 Cochrane risk of bias 99 (93.4)
 Jadad scale 2 (1.9)
 Pedro Scale 2 (1.9)
 Others 1 (0.9)
 Risk of bias assessment tool not used 2 (1.9)
Included a PRISMA-like flow diagram 102 (96.2)
  1. MeSH Medicine Medical Subject Headings, PRISMA Preferred Reporting Items for Systematic Reviews and Meta-analysis, SR Systematic review
  2. *Values are n (%) or median (range)