Predisposing factors for positive D-Xylose breath test for evaluation of small intestinal bacterial overgrowth: A retrospective study of 932 patients

Table 1 Patient demographics

	+XBT			-XBT			P value
	n	mean	SD	n	mean	SD
Age contrasts (yr) (n = 932)	513	58.7	14.8	419	55.9	15.9	P = 0.10 (XBT)
Male:	56	59.6	15.9	148	60.3	16.3	P = 0.0025 (Gender)
Female:	457	58.6	14.7	271	53.4	15.2	P = 0.024 (Interact)
Overall mean: 57.4 overall SD: 15.4
BMI contrasts (n = 451)	244	24.1	5.90	207	29.5	7.33	P = 0.0050 (XBT)
Male: (n = 91)	23	24.3	5.65	68	28.8	6.96	P = 0.26 (Gender)
Female: (n = 360)	221	24.0	5.94	139	29.9	7.52	P = 0.42 (Interact)
Overall mean: 26.6 overall SD: 7.1
Gender contrast (n = 932)
Male, n (%)	56 (11)			148 (35)			P < 0.0001
Female, n (%)	457 (89)			271 (65)

XBT: D-Xylose breath test; BMI: Body mass index.