A 29-year-old woman presents with joint pain for 1 year and scattered petechiae for 2 months accompanied by menorrhagia. Laboratory tests: erythrocyte sedimentation rate (ESR) 100mm/h, normal ASO, hemoglobin (Hb) 86g/L, platelets (PLT) 51×10<sup>9</sup>/L, antinuclear antibody (ANA) granular pattern positive, proteinuria (+++). Diagnosed with systemic lupus erythematosus (SLE), which of the following statements about prognosis is INCORRECT?