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CompletedNCT05893147BALANCE+Updated Oct 1, 2024

BALANCE+ Vanguard Phase

An interventional study of De-escalation VS No De-escalation and Oral beta-lactams VS non beta-lactams in Gram-negative Bacteremia, sponsored by Sunnybrook Health Sciences Centre. Completed at 10 sites in Canada. Per ClinicalTrials.gov, last updated 2024-10-01.

Sponsored by Sunnybrook Health Sciences Centre · Not applicable, Interventional, and Other

Phase
Not applicable
Study type
Interventional
Enrollment
174
Allocation
Randomized
Sex
All
01

Study summary

The goal of the BALANCE+ clinical trial is to transform random care to randomized care for patients with Gram negative bloodstream infections to inform best treatment approaches and optimize outcomes.

BALANCE+, a perpetual platform trial, will efficiently answer multiple questions that are important for hospitalized patients with Gram negative bloodstream infections.

Read the detailed description

Bloodstream infections (BSIs) are common and lethal, ranking among the top 7 causes of death, with 600,000 cases and 90,000 deaths per year in North America, and 1.2 Million cases and 150,000 deaths per year in Europe. Despite being a leading cause of death worldwide, bloodstream infections remain understudied. Treatment approaches are complicated by rising rates of antimicrobial resistance and declining new drug development.

BALANCE+ provides a platform upon which to answer multiple pressing cross-cutting questions for patients with Gram negative bloodstream infections, including the concept of de-escalating antibiotic spectrum, optimal transition to oral antibiotics, and the role for routine follow up blood culture testing. The trial will also include a syndrome-specific question of whether to remove or retain a central vascular catheter, and a pathogen-specific question of whether cephalosporins are sufficient for patients with low-risk AmpC organisms. As each question is answered, optimal therapies will be adopted into usual care, and new questions will be introduced into the platform of the trial. The evidence generated by BALANCE+ will improve cure for this vulnerable patient population.

02

Conditions studied

  • Gram-negative Bacteremia
03

In context

Lead sponsor

Sunnybrook Health Sciences Centre is the lead sponsor of 582 studies on the registry; 133 are open to participants now.

Of its 6 completed or terminated interventional studies of FDA-regulated products, 2 (33%) have results posted.

Counted across the registry records on this site, refreshed daily.

04

Who can participate

Ages eligible
Child (0–17), Adult (18–64), Older adult (65+)
Sexes eligible
All
Accepts healthy volunteers
No

Eligibility criteria

PLATFORM INCLUSION CRITERIA

  1. admitted to a participating hospital
  2. positive blood culture with Gram negative (GN) bacterium

PLATFORM EXCLUSION CRITERIA

  1. patient's goals of care are for palliation with no active treatment
  2. moribund patient, not expected to survive > 72 hours

DOMAIN SPECIFIC INCLUSION AND EXCLUSION CRITERIA

(A) DE-ESCALATION VS. NO DE-ESCALATION DOMAIN

Inclusion Criteria

1. included in BALANCE+ platform

Exclusion Criteria

  1. receiving an empiric antibiotic regimen at the time of blood culture finalization to which the GN pathogen(s) are not sensitive
  2. carbapenem-resistance (so that patients will not need to remain on reserve-use agents)
  3. no de-escalation option due to any or all of

    i. resistance ii. allergies iii. medical contraindications iv. drug-interaction risk v. other relevant reason

  4. patients with a suspected or proven polymicrobial source of infection

(B) BETA-LACTAM VS. NON-BETA-LACTAM ORAL/ENTERAL TREATMENT DOMAIN

Inclusion Criteria

  1. included in BALANCE+ platform
  2. initially treated with intravenous antibiotics, but clinical team transitioning patient to oral/enteral antibiotic within 7 days of starting treatment

Exclusion Criteria

  1. enrolled in an arm of another BALANCE+ platform domain which limits the use of oral/enteral therapy

    - no-de-escalation arm

  2. no non-beta-lactam options due to any or all of

    i. resistance ii. allergies iii. medical contraindications iv. drug-interaction risk v. other relevant reason

  3. no beta-lactam options due to any or all of

    i. resistance ii. allergies iii. medical contraindications iv. drug-drug interaction risk v. other relevant reason

(C) CENTRAL VASCULAR CATHETER REPLACEMENT DOMAIN

Inclusion Criteria

  1. included in BALANCE+ platform
  2. has an indwelling central vascular catheter that was already in place within the 48-hour period before the onset of bloodstream infection (i.e. is not a new catheter placed within 48 hours of the onset of infection)

Exclusion Criteria

  1. patient has no ongoing need for a central vascular catheter
  2. patient has definite indication for central vascular catheter removal

    1. ongoing septic shock with definite/probable line source
    2. concomitant S. aureus bacteremia
    3. concomitant candidemia
    4. local suppurative signs (severe redness, warmth, pain, swelling or fluctuance/collection) necessitating catheter removal, or other clinical evidence of infected line (e.g. imaging/echocardiographic findings)
    5. definite alternative source of GN BSI

(D) LOW-RISK AmpC DOMAIN

Inclusion Criteria

  1. included in BALANCE+ platform
  2. positive blood culture with GN bacterium, of the following species

    1. Serratia spp.
    2. Morganella spp.
    3. Providencia spp.
    4. Proteus spp. other than P.mirabilis
    5. organism is sensitive to ceftriaxone

Exclusion Criteria

  1. severe allergy to beta-lactams (eg, type 4 hypersensitivity reaction or DRESS)
  2. baseline phenotypic resistance to ceftriaxone

(E) FOLLOW UP BLOOD CULTURE DOMAIN

Inclusion Criteria

1. included in BALANCE+ platform

Exclusion Criteria

  1. patient already discharged home prior to day 4
  2. definite indication for repeat blood culture testing

    1. concomitant Staph. aureus bacteremia
    2. concomitant Candidemia
    3. clinical suspicion for infective endocarditis (e.g., presence of prosthetic valve, implantable cardiac device)
05

Study design

Phase
Not applicable
Primary purpose
Other
Allocation
Randomized
Intervention model
Parallel assignment
Masking
None (open label)
Enrollment
174 participants (actual)

Study arms

  • Active comparator
    De-escalation VS No De-escalation

    Other: De-escalation VS No De-escalation

  • Active comparator
    Oral beta-lactams VS Oral Non-beta-lactams

    Other: Oral beta-lactams VS non beta-lactams

  • Active comparator
    Central vascular catheter retention VS Central vascular catheter replacement

    Other: Central vascular catheter retention VS Central vascular catheter replacement

  • Active comparator
    Cephalosporin VS Carbapenem for low risk AmpC organisms

    Other: Cephalosporin VS Carbapenem for low risk AmpC organisms

  • Active comparator
    Routine follow-up blood culture VS No routine follow-up blood culture

    Other: Routine follow-up blood culture VS No routine follow-up blood culture

Interventions

  • OtherDe-escalation VS No De-escalation

    No de-escalation group: continue to receive the same antibiotic that was started initially (as long as it is confirmed to be effective based on the blood culture sensitivity result) De-escalation group: switched to narrower spectrum antibiotic.

  • OtherOral beta-lactams VS non beta-lactams

    Beta-lactam antibiotic: This can be ciprofloxacin, moxifloxacin, levofloxacin or trimethoprim-sulfamethoxazole. Non beta-lactam antibiotic: This can be, but not limited to, amoxicillin, amoxicillin-clavulanate, cephalexin, cefadroxil, or cefixime.

  • OtherCentral vascular catheter retention VS Central vascular catheter replacement

    Central vascular catheter replacement: the catheter will be changed by the treating team as soon as possible and within a maximum of 72 hours from blood culture finalization Central vascular catheter retention: the catheter will not be changed and will be retained until it is no longer needed.

  • OtherCephalosporin VS Carbapenem for low risk AmpC organisms

    Cephalosporin (ceftriaxone) at standard doses Carbapenem (like Meropenem, Ertapenem etc) at standard doses

  • OtherRoutine follow-up blood culture VS No routine follow-up blood culture

    Routine follow-up blood culture: routine repeat blood collection 4 days from the index blood collection with positive bacteria. No follow-up blood culture: no routine repeat blood collection 4 days from the index blood collection with positive bacteria

06

What researchers measure

Primary outcomes

  1. Recruitment rate (co-primary outcomes of BALANCE+ vanguard phase)

    Recruitment rate will be measured as the number of patients randomized to each study domain, overall, and by individual participating site. Investigators will target a minimum overall recruitment rate of 1 patient/site/month in the de-escalation domain, beta-lactam versus non-beta-lactam stepdown domain, and FUBC domain; and 0.25 patients/site/month in the line replacement domain.

    Time frame: 1 year

  2. Protocol adherence (co-primary outcomes of BALANCE+ vanguard phase)

    Protocol adherence will be calculated differently depending on the domain, but in each case will require adherence to the specific intervention arm and complete follow-up for the primary outcome. Investigators will target ≥90% adherence in each arm of each domain.

    Time frame: 1 year

  3. De-escalation versus no de-escalation domain

    * Patient-centered, ordinal Desirability of Outcome Ranking (DOOR) outcome: (dead at 90 days) \< (alive at 90 days with reinfection and readmission) \< (alive at 90 days with reinfection or readmission) \< (alive at 90 days with neither reinfection nor readmission) * Tie-breaker within ordinal levels: new antimicrobial resistance (AMR) colonization or infection from routine cultures

    Time frame: 90 days

  4. Oral beta-lactam versus non beta-lactam domain

    * Ordinal DOOR outcome: (dead at 90 days) \< (alive at 90 days with reinfection and readmission) \< (alive at 90 days with reinfection or readmission) \< (alive at 90 days with neither reinfection nor readmission) * Tie-breaker within ordinal levels: new AMR colonization or infection from routine cultures

    Time frame: 90 days

  5. Central vascular catheter retention versus replacement domain

    * Ordinal DOOR outcome: (dead at 90 days) \< (alive at 90 days with reinfection and readmission) \< (alive at 90 days with reinfection or readmission) \< (alive at 90 days with neither reinfection nor readmission) * No tie-breaker

    Time frame: 90 days

  6. Low-risk AmpC domain

    * Ordinal DOOR outcome: (dead at 90 days) \< (alive at 90 days with reinfection and readmission) \< (alive at 90 days with reinfection or readmission) \< (alive at 90 days with neither reinfection nor readmission) * Tie-breaker within ordinal levels: new AMR colonization or infection from routine cultures

    Time frame: 90 days

  7. Follow-up blood culture domain

    * Ordinal DOOR outcome: (dead at 90 days) \< (alive at 90 days with reinfection and readmission) \< (alive at 90 days with reinfection or readmission) \< (alive at 90 days with neither reinfection nor readmission) * No tie-breaker

    Time frame: 90 days

Secondary outcomes

  1. 90-day mortality

    Time frame: 90 days

  2. 90-day reinfection

    Time frame: 90 days

  3. 90-day all cause readmission

    Time frame: 90 days

  4. 90-day AMR colonization/infection

    Time frame: 90 days

  5. 90-day Clostridioides difficile infection (CDI)

    Time frame: 90 days

  6. 30-day mortality

    Time frame: 30 days

  7. 60-day mortality

    Time frame: 60 days

07

Study locations

10 sites
  • Foothills Hospital
    Calgary, Alberta, Canada
  • Peter Lougheed Centre
    Calgary, Alberta, Canada
  • Eastern Regional Health Authority
    St. John's, Newfoundland and Labrador, Canada
  • The Ottawa Hospital
    Ottawa, Ontario, Canada
  • Niagara Health System
    St. Catharines, Ontario, Canada
  • Sunnybrook Health Sciences Centre
    Toronto, Ontario M4N3M5, Canada
  • Michael Garron Hospital
    Toronto, Ontario, Canada
  • Mount Sinai Hospital
    Toronto, Ontario, Canada
  • North York General Hospital
    Toronto, Ontario, Canada
  • University Health Network
    Toronto, Ontario, Canada
08

References and documents

Publications

  • Daneman N, Johnstone J, Lee TC, MacFadden DR, McDonald EG, Morpeth SC, Ong SWX, Paterson DL, Pinto RL, Rishu A, Rogers BA, Yahav D, Coburn B, Daley P, Das P, Fiest K, Findlater A, Fralick M, George M, Kandel C, Malavade A, Powis J, Somayaji R, Fowler R; BALANCE+ Investigators, and the Association of Medical Microbiology and Infectious Disease Canada Clinical Research Network and the Canadian Critical Care Trials Group. Assessing the feasibility of a platform trial for Gram negative bloodstream infections: results from the vanguard phase of BALANCE. BMJ Open. 2025 Dec 5;15(12):e101588. doi: 10.1136/bmjopen-2025-101588. PubMed 41360461 ↗

Individual participant data

Plan to share: No

09

Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Oct 1, 2024, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
10

Registry details

Key details

Study ID
NCT05893147
Collaborators
Canadian Institutes of Health Research (CIHR)
Responsible party
Sponsor
First posted
Jun 7, 2023
Start date
Aug 26, 2023
Primary completion
Jul 23, 2024
Completion
Aug 10, 2024
Last update
Oct 1, 2024

Study contacts

Nick Daneman, MD
principal investigator · Sunnybrook Health Sciences Centre
Rob Fowler, MD
principal investigator · Sunnybrook Health Sciences Centre

Oversight

Data monitoring committee
Yes
FDA-regulated drug
No
FDA-regulated device
No
View the source record on ClinicalTrials.gov ↗

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