Table 3.

Performance of the text mining algorithm for diagnosis of SLE

Diagnosis	n (according to manual review)	Sensitivity	Specificity	PPV	NPV
SLE	53	0.96	0.93	0.95	0.95
APS	11	0.72	1	1	0.97
No diagnosis	26	0.85	0.89	0.73	0.94

Sensitivity, specificity, PPV, and NPV for all diagnoses with a prevalence of >10% in the 100 randomly selected patients (n = 90). Ten patients had a diagnosis other than SLE or APS.

Abbreviations: APS, antiphospholipid syndrome; NPV, negative predictive value; PPV, positive predictive value; SLE, systemic lupus erythematosus.