Table 2

Relative weights of the additive classification criteria items

Domain	Item	Original	Modification	Revised	Simplified
Constitutional	Fever	13		13	2
Haematological	Leucopenia	12	+7	19	3
	Thrombocytopenia	26		26	4
	Autoimmune haemolysis	28		28	4
Neuropsychiatric	Delirium	12		12	2
	Psychosis	20		20	3
	Seizure	34		34	5
Mucocutaneous	Alopecia	13		13	2
	Oral ulcers	14		14	2
	Subacute lupus erythematosus (SCLE)/discoid lupus erythematosus (DLE)	29		29	4
	Acute cutanoues lupus erythematsous (ACLE)	38		38	6
Serosal	Effusion	34		34	5
Serosal	Acute pericarditis	38		38	6
Musculoskeletal	Joint involvement	34	+4	38	6
Renal	Proteinuria	27		27	4
	Class II/V	55		55	8
	Class III/IV	74		74	10

APL antibodies	Antiphospholipid	13		13	2
Complements	C3 or C4 low	19		19	3
Complements	C3 and C4 low	27		27	4
SLE-specific antibodies	Anti-Sm	40		40	6
SLE-specific antibodies	Anti-dsDNA	38		38	6

Weights derived from the phase III consensus meeting with multicriteria decisions analysis (original), added points for leucopenia and joint involvement (modification), the resulting weights (revised) and the final simplified weights (simplified).
SLE, systemic lupus erythematosus; anti-Sm, anti-Smith; dsDNA, double-stranded DNA; dsDNA, double-stranded DNA;