Pickard R, Chadwick T, Oluboyede Y, Brennand C, von Wilamowitz-Moellendorff A, McClurg D, Wilkinson J, Ternent L, Fisher H, Walton K, McColl E, Vale L, Wood R, Abdel-Fattah M, Hilton P, Fader M, Harrison S, Larcombe J, Little P, Timoney A, N'Dow J, Armstrong H, Morris N, Walker K, and Thiruchelvam N
Background: People carrying out clean intermittent self-catheterisation (CISC) to empty their bladder often suffer repeated urinary tract infections (UTIs). Continuous once-daily, low-dose antibiotic treatment (antibiotic prophylaxis) is commonly advised but knowledge of its effectiveness is lacking., Objective: To assess the benefit, harms and cost-effectiveness of antibiotic prophylaxis to prevent UTIs in people who perform CISC., Design: Parallel-group, open-label, patient-randomised 12-month trial of allocated intervention with 3-monthly follow-up. Outcome assessors were blind to allocation., Setting: UK NHS, with recruitment of patients from 51 sites., Participants: Four hundred and four adults performing CISC and predicted to continue for ≥ 12 months who had suffered at least two UTIs in the previous year or had been hospitalised for a UTI in the previous year., Interventions: A central randomisation system using random block allocation set by an independent statistician allocated participants to the experimental group [once-daily oral antibiotic prophylaxis using either 50 mg of nitrofurantoin, 100 mg of trimethoprim (Kent Pharmaceuticals, Ashford, UK) or 250 mg of cefalexin (Sandoz Ltd, Holzkirchen, Germany); n = 203] or the control group of no prophylaxis ( n = 201), both for 12 months., Main Outcome Measures: The primary clinical outcome was relative frequency of symptomatic, antibiotic-treated UTI. Cost-effectiveness was assessed by cost per UTI avoided. The secondary measures were microbiologically proven UTI, antimicrobial resistance, health status and participants' attitudes to antibiotic use., Results: The frequency of symptomatic antibiotic-treated UTI was reduced by 48% using prophylaxis [incidence rate ratio (IRR) 0.52, 95% confidence interval (CI) 0.44 to 0.61; n = 361]. Reduction in microbiologically proven UTI was similar (IRR 0.49, 95% CI 0.39 to 0.60; n = 361). Absolute reduction in UTI episodes over 12 months was from a median (interquartile range) of 2 (1-4) in the no-prophylaxis group ( n = 180) to 1 (0-2) in the prophylaxis group ( n = 181). The results were unchanged by adjustment for days at risk of UTI and the presence of factors giving higher risk of UTI. Development of antimicrobial resistance was seen more frequently in pathogens isolated from urine and Escherichia coli from perianal swabs in participants allocated to antibiotic prophylaxis. The use of prophylaxis incurred an extra cost of £99 to prevent one UTI (not including costs related to increased antimicrobial resistance). The emotional and practical burden of CISC and UTI influenced well-being, but health status measured over 12 months was similar between groups and did not deteriorate significantly during UTI. Participants were generally unconcerned about using antibiotics, including the possible development of antimicrobial resistance., Limitations: Lack of blinding may have led participants in each group to use different thresholds to trigger reporting and treatment-seeking for UTI., Conclusions: The results of this large randomised trial, conducted in accordance with best practice, demonstrate clear benefit for antibiotic prophylaxis in terms of reducing the frequency of UTI for people carrying out CISC. Antibiotic prophylaxis use appears safe for individuals over 12 months, but the emergence of resistant urinary pathogens may prejudice longer-term management of recurrent UTI and is a public health concern. Future work includes longer-term studies of antimicrobial resistance and studies of non-antibiotic preventative strategies., Trial Registration: Current Controlled Trials ISRCTN67145101 and EudraCT 2013-002556-32., Funding: This project was funded by the National Institute for Health Research Health Technology Assessment programme and will be published in full in Health Technology Assessment Vol. 22, No. 24. See the NIHR Journals Library website for further project information., Competing Interests: Robert Pickard reports grants from the National Institute for Health Research (NIHR) during the conduct of the study. Thomas Chadwick reports grants from the NIHR Health Technology Assessment (HTA) programme during the conduct of the study and outside the submitted work. Katherine Walton reports grants from NIHR during the conduct of the study. Elaine McColl reports grants from the NIHR HTA programme during the conduct of the study and from the NIHR Journals Library outside the submitted work. From 2013 to 2016 she was an editor for the NIHR Programme Grants for Applied Research (PGfAR) series, with a fee paid to her employing organisation. Luke Vale reports that he is a member of the NIHR HTA Clinical Evaluation and Trials panel and is co-director of NIHR Research Design Service North East. Mohamed Abdel-Fattah reports grants from Bard Medical UK (Crawley, UK), Astellas Pharma Inc. (Tokyo, Japan), Coloplast (Humlebæk, Denmark), Pfizer Inc. (New York, NY, USA), Advanced Medical Solutions [(AMS) Winsford, UK] and Ethicon Inc. (Somerville, NJ, USA) outside the submitted work and is a member of the HTA Interventional Procedures panel. Paul Hilton reports a grant from the NIHR HTA programme during the conduct of the study and grants from the William Harker Foundation and Wellbeing of Women outside the submitted work. He was a member of the National Institute for Health and Care Excellence (NICE) Interventional Procedures Advisory Committee (2002–7), NIHR Evaluation, Trials and Studies Coordinating Centre (NETSCC)-HTA Therapeutic Procedures Panel (2007–8) and NETSCC-HTA Clinical Evaluations and Trials Prioritisation Group (2008–10). He chaired the NICE development group for clinical guideline on urinary incontinence in women (2004–7). Mandy Fader reports grants from NIHR (reference number RP-PG-0610-10078) and from the Small Business Research Initiative grant outside the submitted work. Simon Harrison reports grants from the NIHR HTA programme (reference number 11/72/01) during the conduct of the study. James Larcombe reports grants from the NIHR HTA programme during the conduct of the study and is a member of the HTA Elective and Emergency Specialist Care panel. Paul Little reports that he is director of PGfAR and editor-in-chief of the PGfAR publication in the NIHR Journals Library. James N’Dow is a member of the HTA General Board. Nikesh Thiruchelvam reports grants from Astellas, non-financial support from Astellas and personal fees from Coloplast outside the submitted work.