The three clinical remission groups exhibited differences in the lowest antinuclear antibodies titers (p = 0.008), the highest C3 (p < 0.001) and highest C4 (p = 0.001) levels, the percentages of ever positive anti-dsDNA antibodies (p = 0.038), leukopenia (p = 0.002), hematuria (p = 0.034), and seizure (p = 0.002). The gene discussed is C3; the disease is Decreased total leukocyte count.