RESUMO
Pain is a common but often undertreated symptom in patients with chronic kidney disease (CKD) with a much higher prevalence than in the general population. The aim of this systematic review was to synthesize all available quantitative evidence, in order to gain a better understanding of pain prevalence and pain types in patients with CKD. Four databases and the grey literature were searched until 15th January 2021. Random-effect meta-analyses were conducted with multiple subgroup analyses and meta-regressions to further explore the between-study heterogeneity. The quality of studies included was assessed using the Newcastle-Ottawa scale and the level of evidence was determined using the GRADE approach. One hundred sixteen studies reported data on 40,678 individuals. Results from meta-analyses yielded an overall prevalence of 60% (95% confidence interval 56-64) for pain, 48% (42-55) for chronic pain and 10% (6-15) for neuropathic pain. The prevalence of pain was lower among kidney transplant recipients 46% (37-56) compared with patients undergoing dialysis 63% (57-68) and those with non-dialysis CKD 63% (55-70). Musculoskeletal pain appeared to be the most common pain symptom among patients with CKD managed conservatively 42% (28-56) or receiving dialysis 45% (36-55) whilst abdominal pain was most prevalent in kidney transplant recipients 41% (7-86). Thus, all subgroups of patients with CKD suffer from a high burden of pain. Hence, greater awareness and recognition of this issue is vital to inform policy and service provision in this area.