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To assess the quality of randomized controlled trials (RCTs) on varicocele published from 1979 to 2017. We searched for original RCT on varicocele published between 1979 and 2017. Jadad scale, van Tulder scale, and Cochrane Collaboration Risk of Bias Tool were used to analyze RCT quality over time. Effects on RCT quality including funding source, Institutional Review Board (IR approval, and intervention were assessed. Treatment parameters of varicocele were also analyzed. Blinding and allocation concealment were described in 25.9% an
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