Table 2 Reporting information of literature search.
Category | Frequency | Proportion [%(95% CI)] | |
|---|---|---|---|
Reported database searched (n = 102) | Yes | 89 | 87.30 (79.30–92.50) |
Language of database searched (n = 89)* | English | 88 | 98.90 (92.50–99.80) |
Chinese | 10 | 11.20 (6.20–19.60) | |
Chinese + English | 9 | 10.10 (5.30–18.30) | |
Number of Chinese database searched | Median (IQR) | 5(3–6) | |
Number of English database searched | Median (IQR) | 3(3–4) | |
Number of search strategy | Median (IQR) | 2(1–3) | |
Reported search strategy (n = 89) | Yes | 20 | 22.50 (15.00–32.30) |
Presented search strategy (n = 20) | Manuscript | 9 | 45.00 (25.30–66.40) |
Supplement | 5 | 25.00 (10.80–47.80) | |
Online supplement | 6 | 30.00 (14.10–52.70) | |
Searched previous published meta analysis (n = 89) | Yes | 24 | 27.00 (18.80–37.10) |
Supplemental literature search (n = 89) | Yes | 75 | 84.30 (75.20–90.50) |
Supplemental literature search method (n = 75) | Reference lists checking | 42 | 56.00 (44.70–66.80) |
Clinical trial registration platform | 27 | 36.00 (26.00–47.40) | |
Conference abstracts or Web sites | 43 | 57.30 (46.00–68.00) | |
Google engine | 17 | 22.70 (14.60–33.50) | |
