Predictors of poor outcome in children with steroid sensitive nephrotic syndrome

Incidence and Relapse of Idiopathic Nephrotic Syndrome: Meta-analysis

CONTEXT

Idiopathic nephrotic syndrome (INS) in children is a disease with considerable morbidity, yet the incidence and risk for relapse have not been systematically reviewed.

OBJECTIVE

To estimate the overall pooled weighted incidence and risk for relapse of INS in children.

DATA SOURCES

Medline and Embase (until December 2020).

STUDY SELECTION

All studies reporting incidence (per 100 000 children per year) and/or risk for relapse (the proportion of patients who experience ≥1 relapse) of INS in children (age: <18 years) were eligible.

DATA EXTRACTION

After quality assessment, data were extracted: study (design, localization, and sample size) and patient (age, sex, steroid response, and ethnicity) characteristics, incidence, and risk for relapse.

RESULTS

After screening, 73 studies were included for analysis (27 incidence, 54 relapse). The overall pooled weighted estimate and corresponding prediction interval (PI) of the incidence was 2.92 (95% PI: 0.00-6.51) per 100 000 children per year. Higher incidences were found in non-Western countries (P < .001). Incidence tended to be lower in white children, but this was not significant. The overall pooled weighted estimate of the risk for relapse was 71.9% (95% PI: 38.8-95.5). Between 1945 and 2011, incidence did not change (P = .39), yet the risk for relapse decreased significantly (P = .024), from 87.4% to 66.2%.

LIMITATIONS

There was no full-text availability (n = 33), considerable heterogeneity, and limited studies from Africa, Latin America, and Asia.

CONCLUSIONS

INS has a low incidence with ethnic variation but high risk for relapse. Although corticosteroids have significantly reduced the risk for relapse, it remains unacceptably high, underscoring the need for alternative treatment strategies.

Treatment Outcomes of Pediatric Nephrotic Syndrome Patients Treated in Ayder Comprehensive Specialized and Mekelle General Hospitals, Ethiopia

Background

Nephrotic syndrome is a common glomerular disease in children with a relapsing course that leads to complications and steroid-related toxicities. In Ethiopia, data on the outcomes of steroid therapy in pediatric nephrotic syndrome patients are limited.

Objective

The aim of the study was to assess the treatment outcomes of pediatric nephrotic syndrome patients in Ayder Specialized Comprehensive and Mekelle General Hospitals.

Methods

A retrospective study was conducted among children treated for nephrotic syndrome from 2010 to 2017 in Ayder Comprehensive Specialized and Mekelle General Hospitals. Univariate and multivariate logic regression analyses were performed to identify determinants of treatment outcome with a p-value <0.05 considered statistically significant.

Results

A total of 159 pediatric patients treated for nephrotic syndrome in both hospitals were included in this study. The mean age of participants at the initial diagnosis was 5.21 ± 2.66 years. Most of the patients 150 (94.3%) achieved remission within 4 weeks of steroid therapy. Among initial responders, the majority of the patients 117 (78%) encountered relapses of which 65 (40.9%) were developed frequent relapse/steroid-dependent nephrotic syndrome. Also, the majority of patients 102 (64.5%) encountered steroid-related toxicities. The predictors of frequent relapse/steroid-dependent nephrotic syndrome were age of ≤6 years (AOR=3.16; p=0.00), hematuria (AOR=6.74; p=0.00), infection (AOR=3.28; p=0.01), acute renal failure (AOR=6.09; p=0.01), serum albumin below 1.5g/dl (8.38, p=0.01) and lack of remission within 2 weeks (AOR=3.69; p=0.00).

Conclusion

Most of the pediatric NS patients treated in ACSH and MGH have achieved remission with initial to steroid therapy. However, there was a higher relapse rate and steroid-related toxicities among pediatric NS patients who achieved remission. Early age at diagnosis, hematuria, reduced GFR, infection, and remission time were the independent predictors of the frequent relapsing/steroid-dependent nephrotic disease course.

Short-Duration Prednisolone in Children with Nephrotic Syndrome Relapse: A Noninferiority Randomized Controlled Trial

BACKGROUND AND OBJECTIVES

In children with nephrotic syndrome, steroids are the cornerstone of therapy for relapse. The adequate duration and dosage of steroids, however, have not been an active area of research, especially in children with infrequently relapsing nephrotic syndrome. This study investigated the efficacy of an abbreviated regimen for treatment of a relapse in this population.

DESIGN, SETTING, PARTICIPANTS, & MEASUREMENTS

In a single-center, open-label, randomized controlled trial, we evaluated the efficacy of prednisolone as a "short regimen" (40 mg/m² on alternate days for 2 weeks) compared with "standard regimen" (40 mg/m² on alternate days for 4 weeks) for children aged 1-16 years who achieved remission of a relapse. The primary outcome was the proportion of children developing frequent relapses or steroid dependence at 12 months.

RESULTS

A total of 117 patients were enrolled and randomized to short (55) or standard (62) regimen. Fourteen (24%) patients in standard regimen and 12 (23%) in short regimen developed frequent relapses or steroid dependence over a period of 1 year (risk difference, -1%; 95% confidence interval, -15 to 16; P=0.90). A large 95% confidence interval crossed the proposed noninferiority margin. In a time to event analysis, there was no significant difference in the proportion of children developing frequent relapses or steroid dependence and time to outcome between the two groups (hazard ratio, 1.01; 95% confidence interval, 0.83 to 1.23; P=0.98). Time to relapse, relapse rate, and steroid-related adverse events were similar in both groups. Cumulative steroid exposure was significantly lower in the short regimen (risk difference, -541 mg/m²; 95% confidence interval, -917 to -164 mg/m²; P<0.001).

CONCLUSIONS

In children with infrequently relapsing nephrotic syndrome, a short steroid treatment for relapse resulted in a similar proportion of patients developing frequent relapses or steroid dependence; however, noninferiority of a short regimen was not established.

CLINICAL TRIAL REGISTRY NAME AND REGISTRATION NUMBER

CTRI/2015/11/006345.