Table 3

Scoring system 1: LN-Code

Patient characteristic
All patients are required to have at least one diagnosis code (ICD9 or ICD10) for SLE
Points
(add unless stated)
Total scorePredicted probability
One diagnosis code (ICD10) for LN
Or
Two or more diagnosis codes (ICD9 or ICD10) for LN
35<80<50%
11580–11050–60%
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
70110–14060–70%
95140–17570–80%
Any use of mycophenolate mofetil or mycophenolic acid45175–23080–90%
Age (in years) at first SLE diagnosis codeSubtract 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.