16 Journal of Clinical Urology 15(1) Figure 2. The trend, error bar, and mean pain at baseline, 2 and 4 weeks. VAS: visual analogue score. Table 2. Comparison of the IPSS of patients at baseline, 2 and 4 weeks. Variable Baseline N Tamsulosin Cystone Tamsulosin & cystone Placebo 2 Weeks Tamsulosin Cystone Tamsulosin & cystone Placebo 4 Weeks Tamsulosin Cystone Tamsulosin & cystone Placebo IPSS, international prostate symptom score; SD: standard deviation. 32 35 37 24 32 35 37 24 32 35 37 24 Mean 9.78 9.51 9.62 9.63 SD 19.22 18.26 18.54 23.50 14.91 14.06 12.76 21.04 2.406 2.954 4.146 2.446 3.338 4.559 4.388 3.648 3.344 3.472 3.578 4.070 P value 0.989 <0.001 <0.001