Table 2.

Comparison of treatment type by global discomfort index

Treatment	Ranks		Non-parametric tests
	Mean rank	Sum of ranks	Mann Whitney U	Wilcoxon Rank-Sum	Z	P-value
	30.2	845
Placebo vs OB 20 mg	26.8	751	345	751	-0.77	0.440
	33.9	949
Placebo vs OB 40 mg	23.1	647	241	647	-2.47	0.013
	35.6	997
Placebo vs OB 80 mg	21.4	599	193	599	-3.26	0.001
	30.4	851
OB 40 mg vs OB 80 mg	26.6	745	339	745	-0.87	0.390

OB: Otilonium bromide.