Predictors of late presentation to renal dialysis: a cohort study of linked primary and secondary care records in East London

A practical review of barriers and challenges to a definitive randomised trial of grafts versus fistula

A definitive randomised controlled trial of arteriovenous fistula (AVF) versus arteriovenous grafts (AVG) has been advocated for more than a decade, but as yet, none has been completed. The aim of this article is to summarise the theoretical barriers, review the difficulties in trial design and practicalities that have thus far prevented this from occurring.

Sex disparities in the utilization of nurse-assisted peritoneal dialysis: a mediation analysis using data from the REIN registry

Background

This study was carried out to evaluate the association between patient sex and the proportion of nurse-assisted peritoneal dialysis (PD) at dialysis initiation and to explore whether sex disparities in nurse-assisted PD utilization was explained by predialysis care and/or by social deprivation using mediation analysis.

Methods

This was a retrospective study using data from the Renal Epidemiology and Information Network (REIN) registry linked to the French National Healthcare Database (SNDS) of incident patients between 1 January 2017 and 30 June 2018. A regression logistic was used for statistical analysis. A mediation analysis explored the direct effect of sex on nurse-assisted PD proportion and the indirect effect through the European Deprivation Index (EDI), and the number of general practitioner (GP) and nephrologist visits before dialysis initiation.

Results

Among 1706 patients on PD, there were 637 women (37.3%) and 1069 men (62.7%). Nurse-assisted PD proportion was 332/610 (54.4%) for women vs 464/1036 (44.8%) for men. In the multivariable analysis women were more likely to be treated by nurse-assisted PD {odds ratio (OR) 1.92 [95% confidence interval (CI) 1.46-2.52]}. Nurse-assisted PD was associated with the median number of GP visits [OR 1.44 (95% CI 1.11-1.86)] and with the median number of nephrologist visits [OR 0.59 (95% CI 0.46-0.76)]. The mediation analysis showed a direct effect of sex on nurse-assisted PD [OR 1.90 (95% CI 1.80-2.01)] and an indirect effect through the median number of GP visits [OR 1.05 (95% CI 1.04-1.06], the median number of nephrologist visits [OR 1.02 (95% CI 1.02-1.03)] and quintile 5 of the EDI [OR 1.03 (95% CI 1.02-1.03)].

Conclusion

Women were more frequently treated by nurse-assisted PD than men. Differences between women and men in predialysis care and social deprivation could explain the greater utilization of nurse-assisted PD among women.

Tunnelled central venous catheters for incident haemodialysis patients: a Victorian survey exploring reasons for use

BACKGROUND

Tunnelled central venous catheters (T-CVCs) are used globally as vascular access for patients on haemodialysis (HD) but are associated with increased sepsis, mortality, cost and length of hospitalisation compared with more permanent HD vascular access. The reasons for using T-CVC are varied and poorly understood. A significant and increasing proportion of incident HD patients in Victoria, Australia, have required T-CVC over the last decade.

AIM

To explore reasons for a significant and increasing proportion of incident HD patients in Victoria, Australia, having required T-CVC over the last decade.

METHODS

With rates of starting HD with definitive vascular access consistently below a Victorian quality indicator target of 70%, an online survey was developed to explore reasons why the rate remained lower than desired and to help inform future decisions about this quality indicator. The survey was completed by dialysis access coordinators over an 8-month period and involved all public nephrology services in Victoria.

RESULTS

Of the 125 surveys completed, 101 incident HD patients had no attempt at permanent vascular access prior to T-CVC insertion. For almost half of these (48 patients), there was no active medical decision not to create permanent vascular access prior to commencing dialysis. Reasons for insertion of the T-CVC included deterioration of kidney function faster than anticipated, surgical referral being overlooked, complications related to peritoneal dialysis requiring a change in dialysis modality and changes to initial decisions regarding dialysis modality for kidney failure.

CONCLUSIONS

These survey results provide an opportunity for quality improvement initiatives with respect to dialysis access planning and care.

Predictors of Self-Management Behaviors After Discharge Among Unplanned Dialysis Patients

BACKGROUND

Patients with unplanned dialysis must perform self-management behaviors to maintain their health in the community after discharge. Understanding the factors that predict the postdischarge self-management behaviors of patients with unplanned dialysis can assist nurses to implement appropriate discharge plans for this population.

PURPOSE

This study was designed to predict the effects of uncertainty in illness, self-care knowledge, and social-support-related needs during hospitalization on the self-management behaviors of patients with unplanned dialysis during their first 3 months after discharge from the hospital.

METHODS

One hundred sixty-nine patients with unplanned dialysis from the nephrology department of a medical center in Taiwan were enrolled in this prospective study using convenience sampling. At hospital admission, demographic, uncertainty in illness, self-care knowledge, and social support information was collected using a structured questionnaire. Information on self-management behavior was collected at 3 months postdischarge when the patients visited outpatient clinics.

RESULTS

Hierarchical multiple regression analyses showed that self-care knowledge, uncertainty in illness, and social support were important predictors of self-management behaviors at 3 months postdischarge, explaining 65.6% of the total variance in self-management behaviors. Social support increased the variance in self-management behaviors by 27.9%.

CONCLUSIONS/IMPLICATIONS FOR PRACTICE

Comprehensive discharge planning to improve the postdischarge self-management behaviors of patients with unplanned dialysis should involve interventions to improve self-care knowledge, reduce uncertainty in illness, and increase social support. Building social support should be given priority attention.

Association between practice coding of chronic kidney disease (CKD) in primary care and subsequent hospitalisations and death: a cohort analysis using national audit data

OBJECTIVE

To examine the association between practice percentage coding of chronic kidney disease (CKD) in primary care with risk of subsequent hospitalisations and death.

DESIGN

Retrospective cohort study using linked electronic healthcare records.

SETTING

637 general practitioner (GP) practices in England.

PARTICIPANTS

167 208 patients with CKD stages 3-5 identified by 2 measures of estimated glomerular filtration rate <60 mL/min/1.73 m², separated by at least 90 days, excluding those with coded initiation of renal replacement therapy.

MAIN OUTCOME MEASURES

Hospitalisations with cardiovascular (CV) events, heart failure (HF), acute kidney injury (AKI) and all-cause mortality RESULTS: Participants were followed for (median) 3.8 years for hospital outcomes and 4.3 years for deaths. Rates of hospitalisations with CV events and HF were lower in practices with higher percentage CKD coding. Trends of a small reduction in AKI but no substantial change in rate of deaths were also observed as CKD coding increased. Compared with patients in the median performing practice (74% coded), patients in practices coding 55% of CKD cases had a higher rate of CV hospitalisations (HR 1.061 (95% CI 1.015 to 1.109)) and HF hospitalisations (HR 1.097 (95% CI 1.013 to 1.187)) and patients in practices coding 88% of CKD cases had a reduced rate of CV hospitalisations (HR 0.957 (95% CI 0.920 to 0.996)) and HF hospitalisations (HR 0.918 (95% CI 0.855 to 0.985)). We estimate that 9.0% of CV hospitalisations and 16.0% of HF hospitalisations could be prevented by improving practice CKD coding from 55% to 88%. Prescription of antihypertensives was the most dominant predictor of a reduction in hospitalisation rates for patients with CKD, followed by albuminuria testing and use of statins.

CONCLUSIONS

Higher levels of CKD coding by GP practices were associated with lower rates of CV and HF events, which may be driven by increased use of antihypertensives and regular albuminuria testing, although residual confounding cannot be ruled out.

Is there sex disparity in vascular access at dialysis initiation in France? A mediation analysis using the data of the REIN registry

Background

This study was conducted to estimate the direct effect of sex on the proportion of hemodialysis catheters at dialysis initiation and to investigate whether predialysis care or socioeconomic status acted as a mediator of the sex effect.

Methods

Patients who started dialysis between 01–01-2017 and 30–06-2018 in France were included using the data of the REIN registry. Logistic regression was performed to study the association between sex and the proportion of HD catheters. A mediation analysis with a counterfactual approach was carried out to evaluate whether there was an indirect effect of gender through the proxies of predialysis care (hemoglobin, albumin levels, glomerular filtration rate (GFR) at dialysis initiation) and socioeconomic status. Due to the identification of an interaction between gender and social deprivation, a subgroup analysis was performed among deprived and nondeprived patients.

Results

There were 16 032 patients included, and the sex ratio (M/F) was 10 405/5627. In the multivariable analysis, women were associated with a greater risk of starting dialysis with a catheter (OR 1.32 [95% CI: 1.23–1.42]). There was an indirect effect of sex on the proportion of HD catheters through proxies for predialysis care (albuminemia &lt; 30 g/L (OR 1.08 [95% CI: 1.05–1.10]), hemoglobin &lt; 11 g/dL (OR 1.03 [95% CI: 1.02–1.04]), GFR &lt; 7 ml/min (OR 1.05 [95% CI: 1.04–1.07])). Among deprived patients, there was no direct effect of sex on the catheter proportion.

Conclusions

Women were associated with a higher risk of starting dialysis through an HD catheter. The effect of sex was mediated by predialysis care, particularly for deprived patients.