Introduction: The development of novel drugs with a different mechanism of action has led to considerable progress in multiple myeloma (MM) treatment. However, the exact associations between overall survival (OS) and different treatment types, response to treatment, as well as clinical and laboratory parameters, have not been fully elucidated. We aimed to determine the effect of clinical and laboratory parameters, type of induction therapy, and high-dose chemotherapy with autologous hematopoietic stem-cell transplant (auto-HSCT) on OS in patients with MM. Material and methods: This retrospective study included 413 patients with MM treated between 2006 to 2017. Correlations between selected clinical and laboratory parameters and OS were assessed. The severity of MM was evaluated using the Durie-Salmon classification. Results: The median OS was 4.08 years. The overall response rate to chemotherapy was 76%. The complete remission (CR) rates were higher in patients receiving bortezomib-based therapy than in those receiving thalidomide-based therapy or standard chemotherapy (p < 0.001). The CR rate was positively correlated with OS. The use of auto-HSCT with bortezomib-based therapy was associated with longer OS. Renal failure and elevated urinary protein levels were inversely correlated with OS. The severity of MM at diagnosis was also associated with OS. The percentage of bone marrow  plasma cell infiltration did not correlate with OS. Conclusions: MM is still diagnosed too late, by which time patients have developed almost irreversible complications. However, we confirmed that novel treatments improve OS in these patients, especially when used in addition to auto-HSCT. These findings may facilitate clinical therapeutic decision making.