Table 1. Clinical characterization of patients with ulcerative colitis in antibiotics and placebo groups.

Characteristics	Antibiotic group (n = 12)	Placebo group (n = 8)	p-value
Mean age, year (range)	39.75 (27–69)	44.0 (18–62)	P>0.2
Gender (male/female)	7/5	7/1	P>0.2
Mean duration of disease, year (range)	7.1 (1–20)	6.4 (1–21)	P>0.2
Current activity (mild/moderate/severe)	5/7/0	4/3/1	P>0.2
Extent of disease, number of patients (%)			P>0.2
Pan colitis	3 (25)	2 (25)
Left-sided colitis	6 (50)	4 (50)
Proctitis	3 (25)	2 (25)
Concomitant medications during study
Number of patients (%)			P>0.2
Sulfasalazine	8 (66.7)	5 (62.5)
5-ASA	4 (33.3)	3 (37.5)
Glucocorticoid	3 (25.0)	2 (25.0)

5-ASA, mesalazine.