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Table 1 Positive predictive value (PPV) by M32 assignment categories and whole database

From: Administrative database as a source for assessment of systemic lupus erythematosus prevalence: Estonian experience

M32 assignment category n (%) SLE confirmed, n (%) PPV (95%CI)
general practitioner 126 (18.6) 26 (6.4) 20.6 (13.9–28.7)
other specialist 57 (8.4) 9 (2.2) 15.8 (7.4–27.9)
1 time rheumatologist 105 (15.5) 12 (3.0) 11.4 (6.0–19.1)
2 times rheumatologist 37 (5.5) 14 (3.5) 37.8 (22.4–55.2)
3 times rheumatologist 26 (3.8) 18 (4.5) 69.2 (48.2–85.7)
4 or more times rheumatologist 326 (48.2) 325 (80.4) 100.0
Total 677 (100.0) 404 (100.0) 59.7 (55.8–63.4)