Table 1.

Selected randomized placebo controlled trials of tamsulosin (0.4 mg) assessing symptom scores (recorded as the percentage change between mean baseline and mean achieved symptom scores) and maximal flow rates (recorded as the percentage change between mean baseline and mean achieved peak flow in milliliters per second)

Reference	Number	Duration	% change in symptom score tamsulosin placebo		p value	% change in mean peak flow (mL/s) tamsulosin placebo	p value
Abrahms et al 1997	126	14/52	−29	−18	0.002	22	−1	0.03
Chapple et al 1996	575	14/52	−35	−26	N.S.	16	6	0.002
Lepor et al 1998	756	17/52	−41	−28	<0.001	24	9	<0.001
Narayan and Tewari 2003	735	17/52	−27	−19	0.01	15	9	NSa

^aNot significant.