Table 1.

Proportions (%) of stool specimens with indeterminate Xpert® C. difficile assay results that yielded toxin-producing C. difficile in culture stratified by tcdB cycle-threshold and clinical severity

Xpert® C. difficile assay tcdB cycle-threshold	Patients with indeterminate results (n = 48)	Patients who did not meet the C. difficile infection clinical case definition (n = 9)	Patients who met the C. difficile infection clinical case definition with non-severe clinical disease (n = 32)	Patients who met the C. difficile infection clinical case definition with severe clinical disease (n = 7)
37.1-37.9	6/11 (55)	0/2 (0)	1/4 (25)	5/5 (100)
38.0-38.9	6/16 (38)	1/3 (33)	4/11 (36)	1/2 (50)
39.0-30.9	3/16 (19)	2/3 (67)	1/13 (8)	0
≥40	1/5 (20)	1/1 (100)	0/4 (0)	0