Patient characteristic All patients are required to have at least one diagnosis code (ICD9 or ICD10) for SLE | Points (add unless stated) | Total score | Predicted probability |
One diagnosis code (ICD10) for LN Or Two or more diagnosis codes (ICD9 or ICD10) for LN | 35 | <80 | <50% |
115 | 80–110 | 50–60% | |
One diagnosis code for acute or chronic kidney disease or proteinuria Or Two or more diagnosis codes for acute or chronic kidney disease or proteinuria | 70 | 110–140 | 60–70% |
95 | 140–175 | 70–80% | |
Any use of mycophenolate mofetil or mycophenolic acid | 45 | 175–230 | 80–90% |
Age (in years) at first SLE diagnosis code | Subtract age | >230 | >90% |
Diagnosis codes for LN included ICD10 codes: M32.14 or M32.15, or ICD9 code 710.0 in combination with ICD9 codes: 583.81, 581.81 or 583.89. Diagnosis codes for acute or chronic kidney disease or proteinuria included ICD10 codes: N00–N08, N17–N19 and R80, or ICD9 codes: 580–586 and 791.0.
ICD, International Classification of Diseases; LN, lupus nephritis.