EULAR/ACR SLE classification criteria were not linked to mortality or hospitalization, a developed ominosity model adequately predicted mortality.

Youth, hypertension, and fulfillment of increased numbers of (nonrenal) American College of Rheumatology criteria for SLE were also associated with a reduced time to onset of renal involvement.

Patients with Klinefelter and triple X syndromes show an increased prevalence of SLE and Sjögren disease, likely due to the synergistic interaction of the extra X chromosomes.