Incidence and risk factors for recurrent focal segmental glomerulosclerosis after kidney transplantation: a meta-analysis

To systematically review the incidence and risk factors for recurrent FSGS after kidney transplantation. We searched PubMed, Embase, Medline, Web of Science, the Cochrane Library, CNKI, CBMdisc, Wanfang, and Weipu for case-control studies related to recurrent FSGS from the establishment until October 2022. The protocol was registered on PROSPERO (CRD42022315448). Data were analyzed using Stata 12.0, with odds ratios (counting data) and standardized mean difference (continuous data) being considered as effect sizes. If the I 2 value was greater than 50%, the random-effects model was used; otherwise, a fixed-effects model was used. A meta-analysis on the incidence and risk factors for recurrent FSGS after kidney transplantation was performed. A total of 22 studies with 966 patients and 12 factors were included in the meta-analysis. There were 358 patients with recurrent FSGS and 608 patients without FSGS after kidney transplantation. The results showed that the recurrence rate of FSGS after kidney transplantation was 38% (95% CI: 31%-44%). Age at transplantation (SMD = −0.47, 95% CI −0.73 to −0.20, p = .001), age at onset (SMD = −0.31, 95% CI −0.54 to −0.08, p = .008), time from diagnosis to kidney failure (SMD = −0.24, 95% CI −0.43 to −0.04, p = .018), proteinuria before KT (SMD = 2.04, 95% CI 0.91 − 3.17, p