Randomized Intervention for Children With Vesicoureteral Reflux (RIVUR)
- Conditions
- Vesicoureteral RefluxUrinary Tract Infections
- Interventions
- Drug: Trimethoprim-SulfamethoxazoleDrug: Placebo
- Registration Number
- NCT00405704
- Brief Summary
In this 2-year, multisite, randomized, placebo-controlled trial involving 607 children with vesicoureteral reflux that was diagnosed after a first or second febrile or symptomatic urinary tract infecton, we evaluated the efficacy of Trimethoprim-Sulfamethoxazole (TMP-SMZ) prophylaxis in preventing recurrences (primary outcome). Secondary outcomes were renal scarring, treatment failure (a composite of recurrences and scarring), and antimicrobial resistance.
- Detailed Description
This multicenter, randomized, double-blind, placebo-controlled trial was designed to determine whether daily antimicrobial prophylaxis is superior to placebo in preventing recurrence of urinary tract infection (UTI) in children with vesicoureteral reflux (VUR). Eligibility criteria are described elsewhere. Patients were randomly assigned to treatment for 2 years with daily antimicrobial prophylaxis (trimethoprim-sulfamethoxazole) or placebo. The study was designed to recruit 600 children (approximately 300 in each treatment group). The protocol encouraged prompt evaluation of children with UTI symptoms and early therapy of culture-proven UTIs. It was expected that approximately 10% of children will have to discontinue study medication due to allergic reactions. Assuming a 20% placebo event rate and 10% non-compliance rate, the study has 83% power to detect an absolute 10% event rate in the antimicrobial prophylaxis group. If the placebo event rate is instead 25%, power is 97% to detect an absolute 10% event rate in the treated group, even if non-compliance is as high as 15%. The primary analysis is intention-to-treat with missing outcome data analyzed as UTI.
In addition to collecting follow-up data on urinary tract infections, renal scarring and antimicrobial resistance, quality of life, compliance, safety parameters, utilization of health resources, and change in VUR were assessed periodically throughout the study.
Recruitment & Eligibility
- Status
- COMPLETED
- Sex
- All
- Target Recruitment
- 607
- Age at randomization: at least 2 months, but less than 6 years of age. Note that children as young as 1 month were screened for the study.
- Diagnosed first or second febrile or symptomatic UTI within 112 days prior to randomization
- Presence of Grade I- IV VUR based on radiographic voiding cystourethrogram (VCUG) performed within 112 days of diagnosis of index UTI.
- Appropriately treated index febrile or symptomatic UTI
- Index UTI diagnosis more than 112 days prior to randomization
- History of more than two UTIs prior to randomization
- For patients less than 6 months of age at randomization, gestational age less than 34 weeks
- Co-morbid urologic anomalies
- Hydronephrosis, SFU Grade 4
- Ureterocele
- Urethral valve
- Solitary kidney
- Profoundly decreased renal size unilaterally on ultrasound (based on 2 standard deviations below the mean for age and length) performed within 112 days after diagnosis of index UTI
- Multicystic dysplastic kidney
- Neurogenic bladder
- Pelvic kidney or fused kidney
- Known sulfa allergy, inadequate renal or hepatic function, Glucose-6-phosphate dehydrogenase deficiency or other conditions that are contraindications for use of TMP-SMZ
- History of other renal injury/disease
- Unable to complete the study protocol
- Congenital or acquired immunodeficiency
- Underlying anomalies or chronic diseases that could potentially interfere with response to therapy such as chronic gastrointestinal conditions (i.e., malabsorption, inflammatory bowel disease), liver or kidney failure, or malignancy.
- Complex cardiac disease as defined in the Manual of Procedures.
- Any known syndromes associated with VUR or bladder dysfunction
- Index UTI not successfully treated
- Unlikely to complete follow-up
- Family history of anaphylactic reaction to sulfa medications
Study & Design
- Study Type
- INTERVENTIONAL
- Study Design
- PARALLEL
- Arm && Interventions
Group Intervention Description Trimethoprim-Sulfamethoxazole Trimethoprim-Sulfamethoxazole Cherry-flavored liquid suspension with 3 mg of trimethoprim plus 15 mg sulfamethoxazole per kilogram of body weight, taken once daily. Placebo Placebo Cherry-flavored liquid suspension matched to active comparator.
- Primary Outcome Measures
Name Time Method Recurrent Febrile or Symptomatic Urinary Tract Infection During 2-year Follow-up 2 years
- Secondary Outcome Measures
Name Time Method Outcome Renal Scarring 2 years Renal scarring was defined as a decreased uptake of tracer that was associated with loss of contours or the presence of cortical thinning. Outcome dimercaptosuccinic acid (DMSA) scan was performed at 2 years after enrollment or 3-4 months after the child had met treatment failure criteria.
Severe Renal Scarring on Outcome Scan 2 years Severe renal scarring was defined as scarring in more than 4 of 12 segments in at least one kidney or global atrophy characterized by diffusely scarred and shrunken kidney. Outcome DMSA scan performed at 2 years after enrollment or 3-4 months after the child had met treatment failure criteria.
New Renal Scarring on Outcome Scan 2 years New renal scarring was defined as scarring on the outcome renal scan with technetium -99m-labeled dimercaptosuccinic acid that was not present at baseline. Outcome DMSA scan performed at 2 years after enrollment or 3-4 months after the child had met treatment failure criteria.
Treatment Failure Composite 2 years Treatment failure was defined as the occurrence of two febrile urinary tract infections (UTIs), one febrile UTI and three symptomatic UTIs, four symptomatic UTIs, or new or worsening renal scarring on an interim scan (e.g,, the 12-month visit); renal scans from the 2-year visit are NOT considered in the treatment failure criteria.
Presence of E.Coli Resistant to Trimethoprim-Sulfamethoxazole (TMP-SMZ) (Based on Rectal Swab) 2 years Recurrent Febrile or Symptomatic UTI With Resistant E. Coli 2 years Recurrent Febrile or Symptomatic UTI With Any Resistant Pathogen 2 years
Trial Locations
- Locations (19)
University of Oklahoma
🇺🇸Oklahoma City, Oklahoma, United States
Ann & Robert Lurie Children's Hospital of Chicago
🇺🇸Chicago, Illinois, United States
Children's Hospital of Philadelphia
🇺🇸Philadelphia, Pennsylvania, United States
Texas Children's Hospital
🇺🇸Houston, Texas, United States
Alfred I. duPont Hospital for Children
🇺🇸Wilmington, Delaware, United States
Children's Mercy Hospital
🇺🇸Kansas City, Missouri, United States
Johns Hopkins School of Medicine
🇺🇸Baltimore, Maryland, United States
Children's Hospital of Boston
🇺🇸Boston, Massachusetts, United States
Children's Hospital of Pittsburgh
🇺🇸Pittsburgh, Pennsylvania, United States
Cincinnati Children's Hospital
🇺🇸Cincinnati, Ohio, United States
Oregon Health & Science University
🇺🇸Portland, Oregon, United States
Akron Children's Hospital
🇺🇸Akron, Ohio, United States
University of Wisconsin Children's Hospital
🇺🇸Madison, Wisconsin, United States
Penn State Hershey Medical Center
🇺🇸Hershey, Pennsylvania, United States
University of Alabama
🇺🇸Birmingham, Alabama, United States
Children's National Medical Center
🇺🇸Washington, District of Columbia, United States
Women and Children's Hospital of Buffalo
🇺🇸Buffalo, New York, United States
Wake Forest University Baptist Medical Center
🇺🇸Winston-Salem, North Carolina, United States
Children's Hospital of Michigan
🇺🇸Detroit, Michigan, United States