Table 1

Provisional SLE classification criteria weights determined by a multicriteria decision analysis exercise

Clinical domains and criteria	Weight (points)	Immunological domains and criteria	Weight (points)
Constitutional		Antiphospholipid antibodies
Fever	13	Anticardiolipin IgG >40 GPL units or anti-β2GP1 IgG >40 units or lupus anticoagulant positive	13
Haematological		Complement proteins
Leucopaenia	12	Low C3 or low C4	19
Thrombocytopaenia	26	Low C3 and low C4	27
Autoimmune haemolysis	28	SLE-specific antibodies
Neuropsychiatric		Anti-dsDNA antibody	38
Delirium	12	Anti-Smith antibody	40
Psychosis	20
Seizure	34
Mucocutaneous
Non-scarring alopecia	13
Oral ulcers	14
Subacute cutaneous or discoid lupus*	29*
Acute cutaneous lupus	38
Serositis
Pleural or pericardial effusion	34
Acute pericarditis	38
Musculoskeletal
Synovitis in ≥2 joints	34
Renal
Proteinuria>0.5 g/24 hours	27
Renal biopsy with Class II or V lupus nephritis	55
Renal biopsy with Class III or IV lupus nephritis	74