Table 2.

Patients meeting 1997 ACR classification criteria only (N=35).

REASONS FOR NOT MEETING SLICC CRITERIA:	Number	Example
ANA negative	N=20
No Serologic Criteria:	N=19	e.g. malar, discoid, photo, arthritis
Serologic criteria met but < 4 criteria overall:	N=1	e.g. Anti-Cardiolipin antibody, serositis [lymphopenia, non RBC cast]
ANA positive	N=15
Lymphopenia not met by SLICC:	N=4	e.g. ANA, arthritis, seizure, [lymphopenia]
Malar/photosensitivity combined in SLICC:	N=1	e.g ANA, anti-dsDNA antibody, malar, photosensitivity
APL not met by SLICC:	N=4	e.g. ANA, photosensitivity, arthritis [Anti-Cardiolipin antibody]
Renal not met by SLICC:	N=2	e.g. ANA, arthritis, lymphopenia [non RBC cast]
Combinations of the above	N=4	e.g. ANA, malar, photosensitivity, [lymphopenia]
REASONS FOR NOT MEETING EULAR/ACR CLASSIFICATION CRITERIA:
ANA negative:	N=20
Sufficient points to meet EULAR/ACR if ANA positive:	N=18 [range 10-21, mean 14.38]	e.g. malar, oral ulcer, arthritis, pericarditis
Insufficient points to meet EULAR/ACR if ANA positive:	N=2 [range 6-8, mean 7]	e.g. malar, oral ulcer, discoid, [photosensitivity]
ANA <1:80, not sufficient for entry:	N=6
Sufficient points to meet EULAR/ACR if ANA titer was sufficient:	N=4 [range 10-12, mean 10.75]	e.g. ANA, malar, [photosensitivity], dsDNA
Insufficient points to meet EULAR/ACR if ANA titer was sufficient:	N=2 [range 5-6, mean 5.5]	e.g. ANA, arthritis, [Anti-Cardiolipin antibody], [lymphopenia]
ANA positive/sufficient titer for entry, not meeting points threshold > 10:	N=9 [range 0-9, mean 6.1]	e.g. ANA, discoid, seizure, [lymphopenia]

Abbreviations:: ACR-American College of Rheumatology, EULAR- European Alliance of Associations for Rheumatology, SLICC- Systemic Lupus International Collaborating Clinics, ANA-antinuclear antibody, aPL = antiphospholipid antibody, RBC = red blood cell

Bolded font in Examples column: overlapping criteria falling within the same domain, [Brackets]: criteria not part of, or does not meet, the specified classification criteria