MicroRNA-143 expression inhibits the growth and the invasion of osteosarcoma

Table 5 The Downs and Blacks score and NOS scale

References	Country	Type	Study Quality
			Downs and Black Score	NOS Scale
			Downs and Black Score	Selection	Comparability	Expose	Outcome	Total score
Wen [1]	China	Cohort studies	20	****	*	–	**	*******
Zhao [25]	China	Cohort studies	21	***	**	–	**	*******
Sun [7]	China	Cohort studies	23	***	**	–	**	*******
Dong [15]	China	Cohort studies	23	**	**	–	**	******
Hirahata [4]	Japan	Cohort studies	20	***	**	–	**	*******
Li [28]	China	Cohort studies	19	***	**	–	*	******
Liu [29]	China	Cohort studies	16	***	*	–	*	*****
Zhou [30]	China	Cohort studies	20	**	**	–	**	******
Chen [40]	China	Cohort studies	21	***	**	–	**	*******
Wang [33]	China	Cohort studies	18	***	**	–	**	*******
Osaki [37]	Japan	Cohort studies	18	**	**	–	**	******

ISSN: 1749-799X