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Single Dose Intravenous Antibiotics for Complicated Urinary Tract Infections in Children

PHASE4RECRUITING

Urinary tract infections (UTI) are commonly encountered in children, with 7% diagnosed with at least one UTI by the age of 19 years. The evidence for treatment of uncomplicated UTI is clear; oral antibiotics are as good as intravenous (IV) antibiotics, usually for a total of 7 days. Complicated UTIs (cUTIs) on the other hand, are common reasons for hospital admissions for IV antibiotics and constitute a major burden for healthcare systems.

There is considerable variation in care for children who present with UTI and have complicating features such as vomiting, dehydration, urological abnormalities or have a previous history of UTI. Australian and international guidelines lack clear, evidence-based recommendations to guide treatment in this group. Without gold standard evidence, these children will continue to receive unnecessary IV antibiotics, longer hospital stays and poorer health outcomes.

This multicentre, non-inferiority randomised trial will investigate if One dose - single dose of IV followed by 2 days oral antibiotics is as non-inferior to Three doses for children with UTI and co-existing complicating factors presenting to the Emergency Department (ED). In other words, this study will compare if a single dose of IV antibiotics plus two days oral antibiotics is as clinically effective as 3 doses antibiotics in resolving UTI symptoms at 72 hours after the first dose of IV antibiotics, for complicated UTIs in children presenting to the ED. All participants will receive a total of 7 days of antibiotics for the complicated urinary tract infection.

If 1 dose IV and 2 days oral antibiotics is found to be as good as 3 days, the duration of IV antibiotics for complicated UTI can be reduced along with avoidance of the inherent risks of unnecessary hospital admission by administering a single IV dose in an outpatient/ED setting. On the other hand if a single IV dose results in prolonged symptoms or treatment failure, this will inform practice for the proportion of children who have a single dose of IV antibiotics in the ED and are sent home on oral antibiotics. Regardless of the outcome, this trial will inform clinical practice for complicated UTI to improve health outcomes for this group.

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Study details:

Study design:. An open label, multi-centre, pragmatic, non-inferiority randomised controlled trial (RCT). It will incorporate a two-arm, non-inferiority design with parallel groups and 1:1 allocation of children with ≥2 complicated features of UTI presenting to the ED in whom clinicians deem parenteral antibiotics are required.

Primary objective:. The primary objective of this trial is to compare whether 1 dose of a daily parenteral antibiotic followed by 2 days oral antibiotics is as clinically effective (non-inferior) in resolving UTI symptoms at 72 hours after the first IV dose, as 3 doses of a daily parenteral antibiotic for complicated urinary tract infections presenting to the ED. Definition:.

1 dose: one dose of a daily dose IV to cover Gram negative bacteria +/- one dose IV to cover Enterococcus spp. This will be followed by two days oral antibiotics. 3 doses: three doses of a daily dose IV to cover Gram negative bacteria +/- 3 days IV antibiotics to cover Enterococcus spp.

Secondary objectives:. The secondary objectives of this trial are to compare the following outcomes between the 1 dose and the 3 doses arms:. * Readmission due to persistent fever, vomiting, rigors, or clinical deterioration (e.

g. , poor feeding, dehydration) within 14 days of the initial dose of IV antibiotics. * Readmission due to persistent fever, vomiting, rigors, or clinical deterioration (e.

g. , poor feeding, dehydration) within 1 month of the initial dose of IV antibiotics. * Transfer from HITH/ambulatory care to ward care during admission within 72 hours of the initial dose of IV antibiotics.

* Time to resolution of fever/vomiting/rigors within 72 hours of the initial dose of IV antibiotics as reported by parents/guardian. * Improvement as determined by parents/guardian at 72 hours after the first IV dose. * Antiemetic use for 72 hours from the initial IV antibiotic dose.

* Duration of IV antibiotics (actually received by patient) from the first dose of IV antibiotics to last dose of IV antibiotics. * Duration of oral antibiotics (actually received by patient) from the first dose of oral antibiotics (after IV antibiotics started) to last dose of IV antibiotics. * Total duration of antibiotics: sum of duration of IV antibiotics and oral antibiotics.

* Recurrence of UTI within 14 days from the first dose of IV antibiotics. * Recurrence of UTI within 1 month from the first dose of IV antibiotics. * Complications of UTI from the initial IV antibiotics dose to 14 days after the initial dose.

* Adverse events from the initial IV antibiotics dose to 14 days after the initial dose. * Quality of life (QoL) indicators on Day 1 of IV antibiotics (within 24 hours of initial IV antibiotics) and after Day 4 (72 hours up to Day 7). * Parental QoL on Day 14.

* Cost-effectiveness - hospital administrative data on costs and patient/parents reported costs. * Follow up microbiological urine culture after commencing IV antibiotics. * Imaging reports - ultrasound or other imaging results will be collected for patients who have them performed.

Intervention:. Patients who are eligible for the study will be randomised to receive 1 dose of daily IV antibiotics followed by 2 days of oral antibiotics or 3 doses of daily IV antibiotics . All participants will receive a total of 7 days treatment with antibiotics for the complicated urinary tract infection.

Oral antibiotics will start as soon as able to tolerate, within 12 hours of the last IV dose for both arms. Study methodology:. Enrolment and randomisation: During ED assessment, clinicians will identify patients with a suspected UTI and screen patients against eligibility criteria.

The relevant clinical team at each site will receive standardized, study specific education based on centrally developed study education materials. Presence of the following symptoms/sign will be recorded at baseline (fever, vomiting, rigors, tachycardia). Participants will be randomised to one of the 2 arms after written informed consent is obtained.

Intervention Day 1:. The first dose of the antibiotics will be commenced in the ED. Care of the patient will be as per routine clinical care.

Decision for admission to hospital and location of treatment (ambulatory/Hospital-in-the-Home care) will be determined by the treating clinician as per routine clinical care. Parents will be provided with a thermometer and a diary to record a daily assessment of their child (fever, rigors, vomiting). Intervention Day 4 :.

72 hours after the first dose of IV antibiotics, a research nurse/assistant will conduct an assessment over phone or telehealth to obtain the primary outcome data: Persistence of baseline symptoms (fever, vomiting, rigors) or development of these symptoms (if not previously present) since baseline. Any ambiguity with regards to symptoms being attributable to UTI will be judged by a blinded clinician external to the research team. Follow up Day 14:.

14 days after the first dose of IV antibiotics, a research nurse/assistant will conduct an assessment over phone or telehealth for follow up data including whether GP/ED visit or readmission occurred for UTI and total duration of antibiotics taken by the patient. Follow up 1 month:. 1 month after the first dose of IV antibiotics, a research nurse/assistant will conduct an assessment over phone or telehealth for follow up data including whether GP/ED visit or readmission occurred for UTI, total duration of antibiotics taken by the patient.

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Eligibility criteria

Researchers look for people who fit a certain description, called eligibility criteria. See if you qualify.

Inclusion criteria

  • 3 months (corrected age) to 18 years
  • 2 or more of the following present: Fever (must be present), Vomiting, Rigors, History of recurrent UTI, Urological abnormalities, Tachycardia
  • Urine sample available (Urine culture must have been collected prior to antibiotic treatment, either at the GP or ED - in order to assess urine culture as per below)
  • Abnormal urinary dipstick leucocyte esterase >1+ or nitrite positive OR ≥5 White Blood Cells (WBCs) per high-power field in centrifuged urine OR ≥10 White Blood Cells (WBCs) per mm3 in uncentrifuged urine and bacteriuria with any bacteria per high-power field
  • ED clinician determines the child requires treatment with IV antibiotics

    • Exclusion criteria

  • Sepsis (requiring inotropic support or more than 20ml/kg of fluid bolus in Emergency Department)
  • Known allergy to all once daily study drug options (gentamicin or ceftriaxone or amikacin)
  • If the patient has another co-existing condition which requires (based on established evidence-based guidelines) more than 1 dose of IV antibiotics eg meningitis
  • Known impaired renal function (renal transplant patients or a 10% increase in measured expected creatinine for age/height at ED presentation)
  • Unrepaired posterior urethral valves
  • Indwelling stent and fever
  • Previously enrolled participants in the CHOICE UTI trial
  • No available oral antibiotic option for this UTI: urine culture result already available and multi-resistant organism with susceptibility only to IV antibiotics; previous UTI with multi-resistant organism not an exclusion
  • Previous IV antibiotics for same UTI episode eg interhospital transfer whereby significant time has passed since first dose IV
  • Patients with clinically suspected renal abscess e.g., extreme renal tenderness, out of keeping with pyelonephritis (clinically determined)
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    Eligibility

    Age eligible for study : 3 and older

    Healthy volunteers accepted : No

    Gender eligible for study: All

    Things to know

    Study dates

    Study start: 2022-05-30

    Primary completion: 2028-05-16

    Study completion finish: 2028-05-16

    study type

    Study type

    TREATMENT

    phase

    Phase

      PHASE4

    trial

    Trial ID

    NCT04876131

    Intervention or treatment

    DRUG: Benzylpenicillin - single dose

    DRUG: Benzylpenicillin - three days

    DRUG: Gentamicin - single dose

    DRUG: Gentamicin - three days

    DRUG: Cefalexin - post single dose of IV antibiotics for the remaining two days

    Conditions

    • • Complicated Urinary Tract Infection
    • • Infection
    • • Pediatric Infectious Disease
    Image related to Complicated Urinary Tract Infection

    • Condition: Complicated Urinary Tract Infection, Infection and more

    • DRUG: Benzylpenicillin - single dose and other drugs

    • Parkville, Victoria, Australia and more

    • Sponsor: Murdoch Childrens Research Institute

    You may be eligible to participate in this trial based on your search. Check eligibility by answering some questions.

    Are you running this trial? If you're a clinic or sponsor, you can claim this study. Claim or learn more.

    Find a site

    Closest Location:

    Royal Children's Hospital

    Research sites nearby

    Select from list below to view details:

    • Royal Children's Hospital

      Parkville, Victoria, Australia

    • Perth Children's Hospital

      Perth, Western Australia, Australia

    • Women and Children's Hospital

      Adelaide, South Australia, Australia

    • Monash Health

      Melbourne, Victoria, Australia

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    Study Plan

    This section provides details of the study plan, including how the study is designed and what the study is measuring.

    How is the study designed?

    Participant Group/ArmIntervention/Treatment
    EXPERIMENTAL: Arm 1, 1 dose
    • * Single dose IV to cover Gram negative bacteria followed by 2 days of oral antibiotics
    • * Single dose IV to cover Enterococcus spp
    • IV antibiotics are as per local institutional guidelines and microbiology eg: IV gentamicin with or without IV benzylpenicillin. Gentamicin is used when Gram Negative coverage is appropriate, benzylpenicillin is also used when Enterococcus coverage is appropriate, depending on local microbiology data. Once the IV component is complete the patient will be given an oral antibiotic (cefalexin) on day 2 and 3 of the study.
    DRUG: Benzylpenicillin - single dose
    • Participants will receive a single dose of IV antibiotic (benzylpenicillin).
    • Benzylpenicillin dosing: 1 month - 18 years, IV or Intramuscular (IM) 30 mg/kg (maximum 1.2 g) every 6 hours.
    ACTIVE_COMPARATOR: Arm 2, 3 doses
    • * 3 doses IV to cover Gram negative bacteria
    • * 3 days IV antibiotics to cover Enterococcus spp
    • IV antibiotics are as per local institutional guidelines and microbiology eg: IV gentamicin with or without IV benzylpenicillin. Gentamicin is used when Gram Negative coverage is appropriate, benzylpenicillin is also used when Enterococcus coverage is appropriate, depending on local microbiology data.
    DRUG: Benzylpenicillin - three days
    • Participants will receive three days of this IV antibiotic (benzylpenicillin).
    • Benzylpenicillin dosing: 1 month - 18 years, IV or Intramuscular (IM) 30 mg/kg (maximum 1.2 g) every 6 hours. For severe infections, use up to 60 mg/kg (maximum 2.4 g) every 4-6 hours.

    What is the study measuring?

    Primary outcome

    Primary Outcome MeasurePrimary Outcome DescriptionPrimary Outcome Time Frame
    Risk difference between 1 dose and 3 doses IV in the proportion of participants with clinical failure at 72 hoursClinical failure is defined as persistence of baseline symptoms (fever, vomiting or rigors) or development of new symptoms (fever, vomiting or rigors) attributable to UTI at 72 hours. Assessment of clinical failure to be conducted at least 6 hours after antipyretic. Presence of fever, vomiting, or rigors reported by parents within 6 hours of assessment will be recorded as present at assessment.72 hours

    Secondary outcome

    Secondary Outcome MeasureSecondary Outcome DescriptionSecondary Outcome Time Frame
    Risk difference between 1 dose and 3 doses IV in the proportion of participants readmitted or attending the ED within 14 days of the initial dose of IV antibiotic.Proportion of readmissions within 14 days of the initial dose of IV antibiotics due to persistent fever, vomiting, rigors, or clinical deterioration (eg poor feeding, dehydration) that can be attributable to the UTI14 days
    Risk difference between 1 dose and 3 doses IV in the proportion of participants readmitted or attending the ED within 1 month of the initial dose of IV antibioticsProportion of readmission within 1 month of the initial dose of IV antibiotics due to persistent fever, vomiting, rigors, or clinical deterioration (eg poor feeding, dehydration) that can be attributable to the UTI.1 month
    Risk difference between 1 dose and 3 doses IV in proportion of participants transferred from HITH or ambulatory care to ward care within 72 hours of initial dose of IV antibiotics.Proportions of participants transferred from HITH or ambulatory care to ward care within 72 hours of initial dose of IV antibiotics.72 hours
    Risk difference between 1 dose and 3 doses IV in the proportion of participants with parental reported improvementProportion of patients who are reported as 'generally improved/better' at 72 hours of the initial IV antibiotic dose. This will be reported via the daily diary completed by the parent on day 1, 2 and 3.72 hours
    Mean difference between 1 dose and 3 doses IV in duration of IV antibiotics usageMean difference between 1 dose and 3 doses IV group in duration (number of days up to 1 decimal point) of IV antibiotics, i.e. mean time difference from first dose of IV antibiotics to last dose of IV antibiotics7 days
    Mean difference between 1 dose and 3 doses IV in duration of oral antibiotic usage.Mean difference between 1 dose and 3 doses IV in the duration (number of days up to 1 decimal point) of oral antibiotics administered to patients, i.e mean time difference between last dose of IV antibiotics and the last dose of oral antibiotics.14 days
    Risk difference between 1 dose and 3 doses IV in the proportion of participants with recurrence of UTI symptoms within 14 days of initial dose of IV antibioticsRisk difference between 1 dose and 3 doses IV in the proportion of participants with recurrence of UTI symptoms within 14 days of the first dose of IV antibiotics. Recurrence of symptoms depends on what symptoms the patient initially presented with but may be classified as recurrence of fever, vomiting, rigors or tachycardia.14 days
    Risk difference between 1 dose and 3 doses IV in the proportion of participants with recurrence of UTI symptoms within 1 month of initial dose of IV antibioticsRisk difference between 1 dose and 3 doses IV in the proportion of participants with recurrence of UTI symptoms within 1 month of initial dose of IV antibiotics. Recurrence of symptoms depends on what symptoms the patient initially presented with but may be classified as recurrence of fever, vomiting, rigors or tachycardia.1 month
    Risk difference in the proportion of participants with complications within 14 days of initial dose of IV antibioticsRisk difference in the proportion of participants with complications within 14 days of initial dose of IV antibiotics. Complications are defined as abscess, sepsis, meningitis from the initial IV antibiotics dose to 14 days after the initial dose that are attributable to the UTI as judged by a clinician.14 days
    Mean difference in the proportion of participants who experience at least one adverse event within 14 days of the initial dose of IV antibioticsMean difference in the proportion of participants who experience at least one adverse event within 14 days of the initial dose of IV antibiotics. An adverse event is described as any untoward medical occurrence in a patient or clinical investigation subject administered a pharmaceutical product and which does not necessarily have a causal relationship with this treatment. An adverse event (AE) can therefore be any unfavourable and unintended sign (including an abnormal laboratory finding), symptom, or disease temporally associated with the use of a medicinal (investigational) product, whether or not related to the medicinal (investigational) product.14 days
    Risk difference between the 1 dose and 3 doses IV groups in the proportion of participants who experience an allergic reaction attributable to the antibiotics administered within 14 days of the initial dose of IV antibioticsRisk difference in the proportion of participants who experience an allergic reaction attributable to the antibiotics administered within 14 days of the initial dose of IV antibiotics. An allergic reaction is classified as an overreactive immune system to a harmless substance known as an allergen in this case a medicinal (investigational) product.14 days
    Mean difference between 1 dose and 3 doses IV on the weighted total score of the Child Health Utility instrument administered within 24 hours after initial dose of IV antibiotics.The Child Health Utility instrument is a 9 item parent-rated, preference-weighted measure used to calculate quality adjusted life years for children. This survey consist of 9 questions asking how the child is feeling and questions about their activity levels. The minimum score is zero and the maximum score for this survey is 1 which indicates optimal health. This should be completed within 24 hours of initial IV antibiotics24 hours
    Mean difference between 1 dose and 3 doses IV on the weighted total score of the Child Health Utility instrument administered between day 5-7 of initial dose of IV antibioticsThe Child Health Utility instrument is a 9 item parent-rated, preference-weighted measure used to calculate quality adjusted life years for children. This survey consist of 9 questions asking how the child is feeling and questions about their activity levels. The minimum score is zero and the maximum score for this survey is 1 which indicates optimal health. This should be completed between day 5 to 7 after initial IV antibioticsDay 5 to 7
    Mean difference between 1 dose and 3 doses IV in the cost-effectiveness of treatment groups.Mean difference between 1 dose and 3 doses IV in the cost-effectiveness of treatment. As judged by survey provided to the families asking about their out of pocket expenses or loss of productive work hours.Day 14
    Risk difference between the 1 dose and 3 doses IV groups in the proportion of patients with bacterial growth in urine culture (day 0)Risk difference between the 1 dose and 3 doses IV groups in the proportion of patients with bacterial growth: for example E.Coli, Enterococcus.Day 0
    Risk difference between the 1 dose and 3 doses IV in the proportion of patients with bacterial growth in urine culture (Day 14)Risk difference between the 1 dose and 3 doses IV groups in the proportion of patients with bacterial growth: for example E.Coli, Enterococcus.Day 14
    Risk difference between the 1 dose and 3 doses IV group in the proportion of patients administered antiemeticsRisk difference between the 1 dose and 3 doses IV in the proportion of patients administered antiemetics (commonly used antiemetics in children are metoclopramide, domperidone, ondansetron and prochlorperazine). As determined by parent reported diary, completed daily for the first 3 days after enrolment.Up to day 3
    Risk difference between the 1 dose and 3 doses IV group in the proportion of patients administered antipyretic or analgesia.Risk difference between the 1 dose and 3 doses IV group in the proportion of patients administered antipyretic or analgesia (commonly used antipyretics and analgesia in children are paracetamol, ibuprofen, naproxen). As determined by parent reported diary, completed daily for the first 3 days after enrolment.Up to day 3
    Risk difference between the 1 dose and 3 doses IV group in the proportion of patients with abnormal imaging.Risk difference between the 1 dose and 3 doses IV group in the proportion of patients with Ultrasound reported abnormalities of the renal tract.Up to1 month

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    References

    Clinical Trials Gov: Single Dose Intravenous Antibiotics for Complicated Urinary Tract Infections in Children

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