Table 1.

Baseline patient characteristics.

Variable	Placebo (n = 12)	ESWT (n = 13)	P valuea
	Mean (95%CI)	Mean (95%CI)
Age	57.8 (49.5, 66.0)	55.7 (48.3, 63.1)	0.687
No. male/female	5/6	3/10	0.340
Anesthetic bladder capacity (ml)b	618.6 (521.0, 716.2)	677.0 (595.6, 758.4)	0.322
Duration of disease (yr)	5.8 (4.2, 7.3)	6.2 (3.6, 8.8)	0.758

Values are presented as mean (95%CI).

*P < 0.05, **P < 0.01, ***P < 0.005, ****P < 0.0001.

^aComparison between ESWT and placebo (Two sample t-test).

^bDuring hydrodistention.