Systematic review of Yougui pills combined with levothyroxine sodium in the treatment of hypothyroidism

Table 3 Methodological quality evaluation of included literature

Ref.	Randomization method	Blind method	Concealment	Integrity of result data	Selective reporting of results	Other bias
Zhang et al[15], 2008	Just mentioned random	Not mentioned	Unclear	Complete data	Low risk	Unclear
Li et al[16], 2012	Random number table	Not mentioned	Unclear	Complete data	Low risk	Unclear
Zhang et al[17], 2015	Not mentioned	Not mentioned	Unclear	Complete data	Low risk	Unclear
Li et al[18], 2016	Just mentioned random	Not mentioned	Unclear	Complete data	Low risk	Unclear
Wang et al[19], 2016	Just mentioned random	Not mentioned	Unclear	Complete data	Low risk	Unclear
Jiang et al[20], 2017	Random number table	Double blind	Unclear	Complete data	Low risk	Unclear
Liu et al[21], 2017	Not mentioned	Not mentioned	Unclear	Complete data	Low risk	Unclear
Chen et al[22], 2018	Not mentioned	Double blind	Unclear	Complete data	Unclear	Unclear
Shi et al[23], 2018	Random number table	Not mentioned	Unclear	Complete data	Unclear	Unclear