TABLE 2.

Laboratory investigations of hypocomplementemic urticarial vasculitis syndrome compared with systemic lupus erythematosus12

HYPOCOMPLEMENTEMIC URTICARIAL VASCULITIS SYNDROME (HUVS)		SYSTEMIC LUPUS ERYTHEMATOSUS (SLE)
Laboratory investigation	Frequency (%)	Laboratory investigation	Frequency (%)
Anti-C1q antuoAb	100	Anti-C1q antuoAb	35
Low C1q	100	Hypocomplementemia	22–47
ANA	61–71	ANA	95
Raised ESR	60–70	Raised ESR	50
dsDNA Ab (transient)	17	dsDNA Ab	>70
Anti-SS-A/SS-B Ab	16–17	Anti-SS-A/SS-B Ab	30–45
Hematological abnormalities	11	Hematological abnormalities	85
Rheumatoid factor	8	Rheumatoid factor	25–33

ANA=antinuclear antibodies; aanti-C1q autoAb=autoantibodies to C1q; dsDNA Ab=antibodies to native DNA; ESR=erythrocyte sedimentation rate; anti-SS-A/SS-B Ab=antibodies to SS-A/SS-B