Table 1.

Demographic and Clinical Characteristics for Patients with UC

	C. difficile Positive N = 34		C. difficile Negative N = 68
Factors	N	Median (P25, P75)	N	Median (P25, P75)	P value
Age (y)	34	44.5 (29.0, 60.0)	68	44.5 (29.0, 60.0)	1.000
Median duration from UC diagnosis to CDAB test (mo)	34	27.0 (7.0, 108.5)	68	36.0 (13.5, 117.0)	0.467
Number of bowel movements (times/d)	34	7.0 (4.5, 10.0)	68	7.0 (5.0, 10.0)	0.947
Factors	N	Mean ± SD	N	Mean ± SD	P value
BMI	34	20.4745 ± 3.82787	68	21.2466 ± 4.10828	0.390
Peripheral venous white blood cell (109/L)	34	8.0676 ± 2.82308	68	8.0554 ± 2.95580	0.984
Peripheral neutrophils (109/L)	34	5.9118 ± 2.82888	68	5.5834 ± 2.70716	0.571
Factors	N	Positive (%)	N	Negative (%)
Male gender	16	47.1	32	47.1	1.000
Smoking status					0.866
Cessation ≥6 mo	2	5.9	7	10.3
Active smoker	4	11.8	9	13.2
Alcohol use					0.218
Cessation ≥6 mo	3	8.8	6	8.8
Active use	4	11.8	2	2.9
Diabetes	3	8.8	7	10.3	1.000
UC Truelove and Witts criteria					0.517
Mild	3	8.8	14	20.6
Moderate	18	52.9	28	41.2
Severe	13	38.2	26	38.2
Mayo score at colonoscopy					0.622
1	5	15.6	8	12.3
2	10	31.3	28	43.1
3	17	53.1	29	44.6
Distribution of UC					0.811
Proctitis	1	2.9	0	0.0
Left-sided colitis	8	23.5	17	25.0
Extensive colitis	25	73.5	51	75.0
History of surgery	2	5.9	3	4.4	1.000
Symptom-fever	7	20.6	15	22.1	0.865
Symptom-abdominal pain	16	47.1	43	63.2	0.119
Symptom-bleeding	27	79.4	63	92.6	0.099
Symptom-diarrhea	29	85.3	65	95.6	0.113
Dilation of colon					0.990
No	33	97.1	66	97.1
≥6 cm	1	2.9	1	1.5
≥8 cm	0	0.0	1	1.5
Subsequent surgery	9	27.3	11	16.2	0.189

UC ulcerative colitis, CDAB Clostridium difficile toxins A and B, SD standard deviation