Primary systemic amyloidosis: multivariate analysis for prognostic factors in 168 cases

Area of Science:

• Hematology
• Oncology
• Internal Medicine

Background:

• Primary systemic amyloidosis (AL) is a plasma cell disorder characterized by the deposition of misfolded immunoglobulin light chains.
• Prognosis in AL amyloidosis is highly variable and influenced by numerous clinical and laboratory factors.
• Accurate risk stratification is crucial for patient management and clinical trial design.

Purpose of the Study:

• To identify key risk factors affecting survival in patients with primary systemic amyloidosis (AL).
• To develop risk-based models for stratifying patients for clinical trials.

Main Methods:

• Retrospective analysis of 168 patients diagnosed with primary systemic amyloidosis (AL).
• Utilized proportional-hazards models to evaluate risk factors influencing survival.
• Developed risk stratification models for the first year and subsequent years post-diagnosis.

Main Results:

• Median survival after diagnosis was 12 months.
• Congestive heart failure, urine light chain, hepatomegaly, and multiple myeloma were adverse prognostic factors within the first year.
• Serum creatinine, multiple myeloma, orthostatic hypotension, and monoclonal serum protein were critical for survival beyond the first year.

Conclusions:

• Identified distinct sets of risk factors impacting early and late survival in AL amyloidosis.
• Risk stratification models can aid in categorizing patients into low-, moderate-, and high-risk groups.
• These findings are vital for stratifying patients in prospective clinical trials for AL amyloidosis.