Table 2.

Baseline serologya

ParameterWhiteBlackOtherP
n542111
Anti-dsDNA (mU/L)205 ± 359421 ± 642448 ± 934NS
    >20 mU/L52 (96)21 (100)10 (91)NS
C3 (mg/dl)42 ± 1939 ± 1531 ± 12NS
    <80 mg/dl52 (96)21 (100)11 (100)NS
C4 (mg/dl)16 ± 1215 ± 1110 ± 9NS
    <15 mg/dl35 (65)12 (57)7 (94)NS
Cryo-level (μg/ml)160 ± 308204 ± 183138 ± 1110.07
    >21 μg/ml49 (91)21 (100)9 (82)NS
n502010
Anti-Ro12 (24)9 (45)6 (60)b0.04
Anti-La3 (15)1 (5)2 (20)NS
Anti-nRNP17 (34)13 (65)c5 (50)0.05
Anti-Sm13 (26)12 (60)c4 (40)0.02
  • a Data are n (%) or means ± SD. Cryo, cryoprecipitable immune complex; dsDNA, double-stranded DNA.

  • b P = 0.05 other versus white.

  • c P < 0.05 black versus white.