In the comparison of PDE5-Is with ABs for LUTS/BPH, we found that ABs had significantly better effect on increasing Qmax than PDE5-Is after removing the study of Kim et al. and the pooled WMD for change of PVR turned to be non-significant after removing the study of Kaplan et al., which could be explained by large sample size and low quality, respectively. The gene discussed is PDE5A; the disease is benign prostatic hyperplasia.