Table 2.

Risk of bias of randomized controlled trials-cochrane scale.

	Heasman et al. (2001)	Azmak et al. (2002)	Kasaj et al. (2007)	Paolantonio et al. (2008a)	Paolantonio et al. (2008b)	Kondreddy et al. (2012)	Medaiah et al. (2014)	John et al. (2015)	Pattnaik et al. (2015)	Jose et al. (2016)	Lecic et al. (2016)	Singh et al. (2018)	Bansal et al. (2019)
Sequence Generation	UNCLEAR	LOW	UNCLEAR	LOW	LOW	UNCLEAR	LOW	LOW	LOW	LOW	LOW	LOW	LOW
Allocation Concealment	UNCLEAR	LOW	UNCLEAR	UNCLEAR	UNCLEAR	UNCLEAR	LOW	LOW	LOW	UNCLEAR	LOW	LOW	LOW
Blinding of participants, personnel and outcome assessors	LOW	LOW	LOW	LOW	LOW	LOW	LOW	LOW	LOW	LOW	LOW	LOW	LOW
Incomplete outcome data	LOW	LOW	LOW	LOW	LOW	LOW	LOW	LOW	LOW	LOW	LOW	LOW	LOW
Selective outcome reporting	LOW	LOW	LOW	LOW	LOW	LOW	LOW	LOW	LOW	LOW	LOW	LOW	LOW
Other sources of bias	LOW	LOW	LOW	LOW	LOW	LOW	LOW	LOW	LOW	LOW	LOW	LOW	LOW