Table 2.

Frequency, mean and standard deviation of the difference between two groups of patients with refractory constipation taking bisacodyl and pyridostigmine before and after treatment

variable	drug	n	mean	Standard deviation	P value
Bristol Score difference	Pyridostigmine	30	2.10	.95	0.005
	Bisacodyl	31	1.41	.84
defecation in week difference(n)	Pyridostigmine	30	4.33	1.88	0.005
	Bisacodyl	31	2.96	1.81
VAS score difference	Pyridostigmine	30	5.96	2.29	0.002
	Bisacodyl	31	4.06	2.22
Time of defecation difference	Pyridostigmine	30	12.30	7.95	0.002
	Bisacodyl	31	6.67	5.23