Table 2.

Comparison between the baseline characteristics of DP-IBS and NDP-IBS patients.

		DP- IBS	NDP-IBS	χ 2 value	P value
Years	<20	20	17	0.187	0.666
	20~50	23	18	0.016	0.0898
	>50	15	9	0.407	0.524
Gender	Male	21	23	2.633	0.105
	Female	37	21
Domicile	Urban	39	27	5.904	<0.05
	Rural	19	17
Marital status	Unmarried	21	10	2.149	0.143
	Married	31	32	30938	<0.05
	Widow	6	2	1.164	0.281
Socioeconomic status	Low	7	14	0.000	0.883
	Middle	28	23	0.160	0.689
	High	23	7	6.795	<0.01