Table 1 The characteristics of the included patients

Sex

0.213^a

 Males (%)

75 (64.7)

28 (75.7)

 Females (%)

41 (35.3)

9 (24.3)

Age(mean ± SD)

37.8 ± 13.5

36.3 ± 13.2

0.550^b

Level of education

0.841^a

 High school diploma or less (%)

48 (41.4)

16 (43.2)

 College degree and above (%)

68 (58.6)

21 (56.8)

Marital status

0.368^a

 Married (%)

75 (64.7)

21 (56.8)

 Single (%)

41 (35.3)

16 (43.2)

Smoking

0.354^c

 Non-smoker (%)

73 (62.9)

23 (62.2)

 Ex-smoker (%)

33 (28.4)

13 (35.1)

 Smoker (%)

10 (8.6)

1 (2.7)

Drinking

0.676^a

 Yes (%)

29 (25.0)

8 (21.6)

 No (%)

87 (75.0)

29 (78.4)

Diagnosis

0.502 ^a

 UC (%)

73 (62.9)

21 (56.8)

 CD (%)

43 (37.1)

16 (43.2)

Disease location of UC

0.483^c

 Proctitis (%)

38 (33.0)

14 (37.8)

 Left-sided colitis (%)

21 (18.3)

4 (10.8)

 Pancolitis (%)

14 (12.2)

3 (8.1)

Disease location of CD

0.492^c

 Small bowel (%)

25 (22.3)

10 (29.4)

 Colon (%)

7 (6.2)

4 (11.8)

 Colon + small bowel (%)

11 (9.8)

2 (5.9)

Diarrhea, times/day

0.630^d

 Never

49 (42.2)

17 (45.9)

 < 3

40 (34.5)

13 (35.1)

 3–6

22 (19.0)

5 (13.5)

 > 6

5 (4.3)

2 (5.4)

Bloody stools

0.755^d

 Never

73 (62.9)

22 (59.5)

 Few

35 (30.2)

13 (35.1)

 Mostly

5 (4.3)

0 (0)

 Entire

3 (2.6)

2 (5.4)

Abdominal pain

0.998^d

 No

19 (16.4)

7 (18.9)

 Mild

57 (49.1)

16 (43.2)

 Moderate

25 (21.6)

10 (27.0)

 Severe

15(12.9)

4 (10.8)

Weight loss

0.959^d

 No

39 (33.6)

12 (32.4)

 Mild

25 (21.6)

9 (24.3)

 Moderate

22 (19.0)

6 (16.2)

 Severe

30 (25.8)

10 (27.0)