Inclusion and exclusioncriteria

    The following criteria were used for the inclusion of eligible articles for the meta-analysis： (1) The double-blind， placebo-controlled， randomized controlled trails (RCTs) with 4 months or greater duration； (2) Studies comparing the efficacy and safety of tamsulosin， alone or in combination， to placebo or control； (3) The participants were adult males with benign prostatic hyperplasia determined by international prostate symptom score (IPSS) or Boyarsky symptom score ......