Renal insufficiency in multiple myeloma: a systematic review and meta-analysis of all randomized trials from 2005-2019.

Clinical trials may be inconsistent in their enrollment and reporting of patients with multiple myeloma (MM) who have renal insufficiency (RI). We performed a systematic review of all MM randomized clinical trials (RCT) from 2005-2019 to evaluate reporting of prevalence, eligibility criteria and outcomes of patients with RI and MM. One-hundred and twenty-three RCTs were included. Only 30% of studies clearly reported on the proportion of patients who had RI. Only 68.2% reported eligibility criteria pertaining to RI, with no uniformity in the reported criteria. The relative risk (RR) of disease progression or death in patients with RI was higher than those without, RR of 1.20 (1.003-1.431) for relapsed/refractory and 1.07 (1.001-1.046) for newly diagnosed. There is inconsistent reporting and enrollment of patients with RI on MM RCT's. We advocate for higher enrollment of patients with RI and transparent reporting of their eligibility criteria and outcomes.