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. Author manuscript; available in PMC: 2020 Aug 1.
Published in final edited form as: Semin Arthritis Rheum. 2019 Jan 4;49(1):84–90. doi: 10.1016/j.semarthrit.2019.01.002

Table 4.

Application of the Machine-Learning Coded-only, Second Case Definition SLE Algorithm (Algorithm 2) to an External Validation Cohort at Vanderbilt University Medical Center

Outcome: Definite/Probable SLE vs. Non-SLE
Specificity (%) Sensitivity (%) PPV (%)
100 25 100
98 42 95
97 61 94
96 63 93

External cohort includes 173 randomly selected subjects at Vanderbilt University Medical Center with ≥ 1 ICD-9 code for SLE after the year 2000. SLE case definition= specialist-reported SLE diagnosis.