Analysis of clinical characteristics and prognostic factors of multiple myeloma: a retrospective single-center study of 787 cases.

Objective: This study aims to explore the clinical features of multiple myeloma (MM) and the influence of various prognostic factors on survival.
Methods: A retrospective analysis, consisting of clinical characteristics analysis and laboratory examinations, was performed on 787 MM patients. Clinical and laboratory parameters were analyzed by multivariate process and compared across different groups.
Results: Of the 787 patients enrolled (median age, 61 years old, range 29-89 years old), 491 (62.4%) were male. Two most common complaints were bone pain (51.2%) and fatigue (48.0%). Anemia (hemoglobin (Hb) ≤100 g/L in female, Hb ≤110 g/L in male) was present initially in 69.4% patients. IgG was the most common type (46.6%). 52.2% of the patients were diagnosed on stage IIIA according to Durie-Salmon (D-S) system, 44.6% are on stage III according to International Staging System (ISS). Multivariate analysis suggested that age, serum calcium, LDH, percentage of abnormal plasma cells in bone marrow were all independent prognostic factors for OS.
Conclusion: The MM patients in China are relatively younger, have higher rate on stage III according to D-S system. Older age, high serum calcium, high LDH, high percentage of abnormal plasma cells in bone marrow were highly related to poor prognosis.