Predicting mortality in microscopic polyangiitis with renal involvement: a survival analysis based on 64 patients

Area of Science:

• Nephrology
• Rheumatology
• Internal Medicine

Background:

• Microscopic polyangiitis (MPA) is a systemic vasculitis often affecting the kidneys.
• Predicting survival and disease progression in MPA is essential for patient management.
• Renal involvement is a significant factor influencing outcomes in MPA.

Purpose of the Study:

• To identify predictors of survival in patients diagnosed with microscopic polyangiitis (MPA).
• To evaluate the prognostic value of baseline clinical and laboratory parameters in MPA patients with renal involvement.

Main Methods:

• Retrospective analysis of a cohort of 64 patients with biopsy-proven MPA and renal involvement.
• All patients received cytotoxic drug therapy.
• Statistical analysis included univariate, logistic regression, and Cox regression models.

Main Results:

• Over a mean follow-up of 38 months, 53.13% of patients experienced death or end-stage renal disease.
• Univariate analysis identified high serum creatinine (Scr), elevated erythrocyte sedimentation rate (ESR), low serum albumin, and low hemoglobin as significant prognostic factors.
• Logistic and Cox regression confirmed that baseline Scr and ESR levels are independently associated with poor prognosis.

Conclusions:

• Renal vasculitis is highly prevalent in MPA patients.
• Serum creatinine (Scr) and erythrocyte sedimentation rate (ESR) levels serve as valuable clinical biomarkers for monitoring prognosis in MPA.
• These biomarkers can aid in early identification of high-risk patients requiring closer monitoring and potentially intensified treatment.