ESR1 and systemic lupus erythematosus: Compared with the damage accrual score [the Systemic Lupus International Collaborating Clinics/American College of Rheumatology Damage Index (SDI)], there was a stronger correlation between the ESR value and the SLE Disease Activity Index (SLEDAI) score, and a value not less than 25 mm/h helped to define disease activity with high sensitivity.