Search

Background In France, kidney diseases of undetermined origin account for 5%–20% of all causes of end-stage kidney disease. We investigated the impact of social disadvantage on the lack of aetiological diagnosis of nephropathies. Methods Data from patients who started dialysis in France between 1 January 2017 and 30 June 2018 were extracted from the French Renal Epidemiology and Information Network registry. The social deprivation of each individual was estimated by the European Deprivation Index (EDI) defined by the patient's address. Logistic regression was used to perform mediation analysis to study the potential association between social deprivation and unknown nephropathy. Results Of the 7218 patients included, 1263 (17.5%) had unknown kidney disease. A total of 394 (31.4%) patients in the unknown kidney disease belonged to the most deprived quintile of the EDI [fifth quintile (Q5)], vs 1636 (27.5%) patients in the known kidney disease group. In the multivariate analysis, unknown kidney disease was associated with Q5 (odds ratio 1.40, 95% confidence interval 1.12–1.74, P  = .003). Mediation analysis did not identify any variables (e.g. obesity, initiation of dialysis in emergency, number of visits to the general practitioner and nephrologist before initiation of dialysis, date of first nephrology consultation) that mediated the association between social deprivation and nephropathy of unknown origin. Conclusions Our results show that, compared with nondeprived subjects, individuals experiencing social deprivation have a higher risk of unknown nephropathy at dialysis initiation. However, mediation analysis did not identify any variables that explained the association between social deprivation and nephropathy of unknown origin. [ABSTRACT FROM AUTHOR]

Background We aimed to evaluate sex differences in peritoneal dialysis (PD) outcomes and to explore direct and indirect effects of nurse-assisted PD on outcomes. Methods This was a retrospective study using data from the Registre de Dialyse Péritonéale de Langue Française of incident PD patients between 2005 and 2016. Cox proportional hazards modelling was used to analyse transfer to haemodialysis (HD), death, PD failure, peritonitis and renal transplantation. Mediation analyses with a counterfactual approach were carried out to evaluate natural direct and indirect effects of sex on transfer to HD and peritonitis, with nurse-assisted PD as a mediator a priori. Results Of the 14 659 patients included, there were 5970 females (41%) and 8689 males (59%). Women were more frequently treated by nurse-assisted PD than men [2926/5970 (49.1%) versus 3357/8689 (38.7%)]. In the multivariable analysis, women had a lower risk of transfer to HD [cause-specific hazard ratio {cs-HR} 0.82 {95% confidence interval (CI) 0.77–0.88}], death [cs-HR 0.90 (95% CI 0.85–0.95)], peritonitis [cs-HR 0.82 (95% CI 0.78–0.87)], PD failure [cs-HR 0.86 (95% CI 0.83–0.90)] and a lower chance of undergoing transplant [cs-HR 0.83 (95% CI 0.77–0.90)] than men. There was a direct effect of sex on the risk of transfer to HD [cs-HR 0.82 (95% CI 0.82–0.83)], with an indirect effect of nurse-assisted PD [cs-HR 0.97 (95% CI 0.96–0.99)]. Nurse-assisted PD had no indirect effect on the risk of peritonitis. Conclusions Our results suggest that compared with men, women have a lower risk of both transfer to HD and peritonitis. Mediation analysis showed that nurse assistance was a potential mediator in the causal pathway between sex and transfer to HD. [ABSTRACT FROM AUTHOR]

Background Socioeconomic status is associated with dialysis modality in developed countries. The main objective of this study was to investigate whether social deprivation, estimated by the European Deprivation Index (EDI), was associated with self-care dialysis in France. Methods The EDI was calculated for patients who started dialysis in 2017. The event of interest was self-care dialysis 3 months after dialysis initiation [self-care peritoneal dialysis (PD) or satellite haemodialysis (HD)]. A logistic model was used for the statistical analysis, and a counterfactual approach was used for the causal mediation analysis. Results Among the 9588 patients included, 2894 (30%) were in the most deprived quintile of the EDI. A total of 1402 patients were treated with self-care dialysis. In the multivariable analysis with the EDI in quintiles, there was no association between social deprivation and self-care dialysis. Compared with the other EDI quintiles, patients from Quintile 5 (most deprived quintile) were less likely to be on self-care dialysis (odds ratio 0.81, 95% confidence interval 0.71–0.93). Age, sex, emergency start, cardiovascular disease, chronic respiratory disease, cancer, severe disability, serum albumin and registration on the waiting list were associated with self-care dialysis. The EDI was not associated with self-care dialysis in either the HD or in the PD subgroups. Conclusions In France, social deprivation estimated by the EDI is associated with self-care dialysis in end-stage renal disease patients undergoing replacement therapy. [ABSTRACT FROM AUTHOR]