Intravesical gemcitabine versus mitomycin for non-muscle invasive bladder cancer: a systematic review and meta-analysis of randomized controlled trial

Table 1 The quality and characteristics of included studies

Study	Randomization	Allocated Concealment	Blinding	Gemcitabine (sample size)	Mitomycin (sample size)	Grade
Dong 2017 [16]	adequate	not used	clear	12	16	C
Lin 2016 [17]	adequate	not used	clear	42	42	C
Sun 2016 [18]	adequate	used	clear	30	28	B
Xiaohong 2015 [19]	adequate	not used	clear	27	29	C
Raffaele 2010 [20]	adequate	used	clear	54	55	B

ISSN: 1471-2490