Association of changes in metabolic syndrome with new-onset and progression of chronic kidney disease

BackgroundMetabolic syndrome (MetS) is an independent risk factor for new-onset and progression of chronic kidney disease (CKD). However, whether changes in MetS are associated with the new-onset CKD and its progression remains unknown.MethodsA total of 36,571 participants from the Kailuan Study were enrolled in this study, including 27,072 without CKD and 9499 with CKD at baseline. According to the changes of MetS, 4 groups were divided as follows: MetS-free group, MetS-recovered group, MetS-developed group, and MetS-persistent group. Cox regression models were used to explore the association of changes in MetS with new-onset and progression of CKD.ResultsDuring a median follow-up of 8.38 years, 3313 cases of new-onset CKD were identified in participants without CKD. Compared with the MetS-free group, the hazard ratio (HR) and 95% confidence interval (95% CI) for new-onset CKD in the MetS-recovered, MetS-developed and MetS-persistent groups was 1.34 (1.18-1.53), 1.46 (1.30-1.63) and 1.85 (1.69-2.02), respectively. Among 9499 participants with CKD, during a median follow-up of 8.18 years, a total of 2305 experienced CKD progression. Compared with the MetS-free group, the HR (95% CI) for CKD progression in each group were 1.05 (0.91-1.22), 1.34 (1.17-1.55) and 1.65 (1.49-1.83), respectively. Furthermore, the association between changes in MetS and new-onset CKD was stronger in younger and middle-aged participants (<= 60 years old) compared with older participants.ConclusionsDeveloped MetS and persistent MetS were both risk factors for the new-onset and progression of CKD. Even with recovery from MetS, an association of MetS with kidney damage remained.