Long term tapering versus standard prednisolone treatment for first episode of childhood nephrotic syndrome: phase III randomised controlled trial and economic evaluation

• Published in: BMJ (Online) Vol. 365; p. l1800
• Main Authors: Webb, Nicholas J A, Woolley, Rebecca L, Lambe, Tosin, Frew, Emma, Brettell, Elizabeth A, Barsoum, Emma N, Trompeter, Richard S, Cummins, Carole, Deeks, Jonathan J, Wheatley, Keith, Ives, Natalie J
• Format: Journal Article
• Language: English
• Published: England BMJ Publishing Group LTD 23.05.2019; BMJ Publishing Group Ltd
• Subjects: Adolescent; Child; Child, Preschool; Children; Clinical medicine; Clinical trials; Cost-Benefit Analysis; Dose-Response Relationship, Drug; Double-Blind Method; Drug Administration Schedule; Drug dosages; Drug Monitoring - methods; Evidence-based medicine; Female; Glucocorticoids - administration & dosage; Glucocorticoids - adverse effects; Glucocorticoids - economics; Health risk assessment; Humans; Immunosuppressive Agents - therapeutic use; Infant; Intention to Treat Analysis; Kidney diseases; Long-Term Care - economics; Long-Term Care - methods; Male; Nephrology; Nephrotic syndrome; Nephrotic Syndrome - diagnosis; Nephrotic Syndrome - drug therapy; Nephrotic Syndrome - economics; Nephrotic Syndrome - psychology; Pediatrics; Prednisolone; Prednisolone - administration & dosage; Prednisolone - adverse effects; Prednisolone - economics; Quality of Life; Secondary Prevention - economics; Secondary Prevention - methods; Statistical analysis; Treatment Outcome; United Kingdom > UK
• ISSN: 0959-8138; 1756-1833
• DOI: 10.1136/bmj.l1800

AbstractObjectiveTo determine whether extending initial prednisolone treatment from eight to 16 weeks in children with idiopathic steroid sensitive nephrotic syndrome improves the pattern of disease relapse.DesignDouble blind, parallel group, phase III randomised placebo controlled trial, including a cost effectiveness analysis.Setting125 UK National Health Service district general hospitals and tertiary paediatric nephrology centres.Participants237 children aged 1-14 years with a first episode of steroid sensitive nephrotic syndrome.InterventionsChildren were randomised to receive an extended 16 week course of prednisolone (total dose 3150 mg/m2) or a standard eight week course of prednisolone (total dose 2240 mg/m2). The drug was supplied as 5 mg tablets alongside matching placebo so that participants in both groups received the same number of tablets at any time point in the study. A minimisation algorithm ensured balanced treatment allocation by ethnicity (South Asian, white, or other) and age (5 years or less, 6 years or more).Main outcome measuresThe primary outcome measure was time to first relapse over a minimum follow-up of 24 months. Secondary outcome measures were relapse rate, incidence of frequently relapsing nephrotic syndrome and steroid dependent nephrotic syndrome, use of alternative immunosuppressive treatment, rates of adverse events, behavioural change using the Achenbach child behaviour checklist, quality adjusted life years, and cost effectiveness from a healthcare perspective. Analysis was by intention to treat.ResultsNo significant difference was found in time to first relapse (hazard ratio 0.87, 95% confidence interval 0.65 to 1.17, log rank P=0.28) or in the incidence of frequently relapsing nephrotic syndrome (extended course 60/114 (53%) v standard course 55/109 (50%), P=0.75), steroid dependent nephrotic syndrome (48/114 (42%) v 48/109 (44%), P=0.77), or requirement for alternative immunosuppressive treatment (62/114 (54%) v 61/109 (56%), P=0.81). Total prednisolone dose after completion of the trial drug was 6674 mg for the extended course versus 5475 mg for the standard course (P=0.07). There were no statistically significant differences in serious adverse event rates (extended course 19/114 (17%) v standard course 27/109 (25%), P=0.13) or adverse event rates, with the exception of behaviour, which was poorer in the standard course group. Scores on the Achenbach child behaviour checklist did not, however, differ. Extended course treatment was associated with a mean increase in generic quality of life (0.0162 additional quality adjusted life years, 95% confidence interval −0.005 to 0.037) and cost savings (difference −£1673 ($2160; €1930), 95% confidence interval −£3455 to £109).ConclusionsClinical outcomes did not improve when the initial course of prednisolone treatment was extended from eight to 16 weeks in UK children with steroid sensitive nephrotic syndrome. However, evidence was found of a short term health economic benefit through reduced resource use and increased quality of life.Trial registrationISRCTN16645249; EudraCT 2010-022489-29.