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Table 1 The quality and characteristics of included studies

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

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