Table 2.

Diagnostic Performance of Immunoglobulin A Responses as Assessed by Area Under the Receiver Operating Characteristic Curve, Sensitivity, and Specificity in Out-of-Sample Validation

Antigen(s)	AUC (95% CI)	Specificity (at 90% Sensitivity), %	Sensitivity (at 90% Specificity), %
HlyE	0.93 (.88–.98)	87	78
MP	0.83 (.76–.90)	48	61
LPS	0.92 (.87–.97)	77	68
HlyE and LPS	0.95 (.90–1.00)	92	91
HlyE, LPS, and MP	0.95 (.90–.99)	90	87

Abbreviations: AUC: area under the receiver operating characteristic curve; CI, confidence interval; HlyE, hemolysin E; LPS, lipopolysaccharide; MP, membrane preparation.