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. 2016 Nov 16;6:37208. doi: 10.1038/srep37208

Table 3. Information of databases searched (n = 89).

  Category Frequency Proportion [%(95% CI)]
Name of database PubMed/MEDLINE 84 94.40 (87.20–97.60)
EMBASE 69 77.50 (67.70–85.00)
The Cochrane Library 71 79.80 (70.20–86.90)
ISI Web of Knowledge 17 19.10 (12.20–28.60)
CNKI 9 10.10 (5.30–18.30)
CBM 9 10.10 (5.30–18.30)
Wanfang 7 7.90 (3.80–15.60)
VIP 8 9.00 (4.60–17.00)
CSCD 7 7.90 (3.80–15.60)
Others 35 39.30 (29.80–49.80)
Common combination of database PubMed/MEDLINE + EMBASE 65 73.00 (62.90–81.20)
PubMed/MEDLINE + Cochrane 69 77.50 (67.70–85.00)
EMBASE + Cochrane 60 67.40 (57.00–76.30)
PubMed/MEDLINE + EMBASE + Cochrane 56 62.90 (52.50–72.30)
PubMed/MEDLINE + ISI Web of Knowledge 17 19.10 (12.20–28.60)
PubMed/MEDLINE + EMBASE + Cochrane + ISI Web of Knowledge 14 15.70 (9.50–24.80)
PubMed/MEDLINE + EMBASE + CBM 8 9.00 (4.60–17.00)
PubMed/MEDLINE + CNKI 7 7.90 (3.80–15.60)