Table 5.

Newcastle-Ottawa scale of the included studies

Author	Representativeness of the sample (*****)						Comparability (**)			Result (***)			Total
	1 (**)		2 (*)	3 (*)	4 (***)		1 (**)		1 (*****)			2 (*)
	a (*)	b (*)	a (*)	a (*)	a (**)	b (*)	a (*)	b (*)	a (**)	b (**)	c (*)	a (*)
Acuña et al.(14)						*						*	**
Albuquerque et al.(15)	*		*	*		*						*	*****
Bezerra et al.(16)	*		*			*						*	****
Castro et al.(17)						*							*
Cruz et al.(18)	*		*									*	***
El-Fakhouri et al.(19)	*		*			*							***
Favarin et al.(20)	*		*	*		*							****
França et al.(21)	*		*	*		*						*	*****
Freitas et al.(22)												*	*
Galvão et al.(23)	*		*	*		*						*	*****
Guia et al.(24)	*		*	*								*	****
Marques et al.(25)	*		*			*							***
Matias et al.(26)	*		*									*	***
Melo et al.(27)	*					*							**
Nascimento et al.(28)				*		*							**
Nogueira et al.(29)	*		*	*		*						*	*****
Nogueira et al.(30)	*		*	*		*						*	*****
Pauletti et al.(31)				*		*						*	***
Perão et al.(32)						*							*
Del Painter et al.(33)						*							*
Queiroz et al.(34)	*		*			*						*	****
Rodriguez et al.(35)	*		*	*		*						*	*****
Silva et al.(36)						*							*
Silva et al.(37)	*		*			*							***
Soares et al.(38)	*		*	*		*						*	*****
Sousa et al.(39)						*							*
Vieira et al.(40)												*	*