Systematic Reviews and Meta-Analyses of Traditional Chinese Medicine Must Search Chinese Databases to Reduce Language Bias

Table 2

Comparison of SRs in TCM that searched Chinese databases with those that did not.

	Whether Chinese databases were searched		𝑃 value for differences
	Yes	No
Number of SRs	43	37
SRs that included Chinese authors	41 (95.35%)	4 (10.81%)	<0.001
Median number of included studies (range)	8.00 (0–75)	6.00 (0–36)	0.58
Median number of studies from Chinese databases (range)	8 (0–74)	0	<0.001
Number (%) of SRs tended to support for an efficacy of TCM treatment	15 (34.88%)	12 (32.43%)	0.82
% of studies from Chinese databases (range)	100.00% (0.00–100.00%)	0	<0.001