Tadalafil @ mg once daily resulted in a significantly greater proportion of patients achieving a @-point IPSS improvement ( @ % and @ % for tadalafil and placebo patients , respectively -LSB- OR @ , @ % CI @ , @ ; P < @ -RSB- ) and achieving a @ % improvement in total IPSS randomisation to endpoint ( @ % and @ % for tadalafil and placebo patients , respectively -LSB- OR @ , @ % CI @ , @ ; P < @ -RSB- ) .