Evidence map›Paper›PMID 19555285›Full record

SynthesisClinical infectious diseases : an official publication of the Infectious Diseases Society of America2009

Antimicrobial agents for complicated skin and skin-structure infections: justification of noninferiority margins in the absence of placebo-controlled trials.

Brad Spellberg, George H Talbot, Helen W Boucher, John S Bradley, David Gilbert, W Michael Scheld, John Edwards, John G Bartlett, Antimicrobial Availability Task Force of the Infectious Diseases Society of America

Abstract readSystematic Review
In one paragraph

Synthesis in Clinical infectious diseases : an official publication of the Infectious Diseases Society of America, 2009. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 19 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
19citing papers in PubMed, 1 pooled it
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

19 citing papers in PubMed, 1 synthesis or guideline pooled it.

  1. Pooled it
  2. Trial
  3. Trial
  4. Trial
  5. Trial
  6. Article
  7. Antibacterial activity of ruthenium polypyridyl complexes against Staphylococcus aureus and biofilms.Journal of biological inorganic chemistry : JBIC : a publication of the Society of Biological Inorganic Chemistry · 2020
    Article
  8. Article
  9. Continuous cefazolin infusion versus cefazolin plus probenecid for the ambulatory treatment of uncomplicated cellulitis: A retrospective cohort study.Journal of the Association of Medical Microbiology and Infectious Disease Canada = Journal officiel de l'Association pour la microbiologie medicale et l'infectiologie Canada · 2019
    Article
  10. Early Response in Cellulitis: A Prospective Study of Dynamics and Predictors.Clinical infectious diseases : an official publication of the Infectious Diseases Society of America · 2016
    Article
  11. Noninferior Antibiotics: When Is "Not Bad" "Good Enough"?Open forum infectious diseases · 2016
    Article
  12. Beyond Antibiotics: New Therapeutic Approaches for Bacterial Infections.Clinical infectious diseases : an official publication of the Infectious Diseases Society of America · 2016
    Article
  13. Article
  14. Article
  15. Combating antimicrobial resistance: policy recommendations to save lives.Clinical infectious diseases : an official publication of the Infectious Diseases Society of America · 2011
    Article
  16. Article
  17. Article
  18. Skin and soft-tissue infections: modern evolution of an ancient problem.Clinical infectious diseases : an official publication of the Infectious Diseases Society of America · 2010
    Article
  19. Review
4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

9 authors.

Brad SpellbergDivision of Infectious Diseases, Harbor-University of California at Los Angeles Medical Center, Torrance, California 90502, USA. bspellberg@labiomed.org
George H Talbot
Helen W Boucher
John S Bradley
David Gilbert
W Michael Scheld
John Edwards
John G Bartlett
Antimicrobial Availability Task Force of the Infectious Diseases Society of America

Funding

Mechanisms of Als vaccine protection against S. aureusR01AI072052 · NIAID · LUNDQUIST INSTITUTE FOR BIOMEDICAL INNOVATION AT HARBOR-UCLA MEDICAL CENTER · PI SPELLBERG, BRAD J · 2007 to 2011
$1.8M
Adrenergic Antagonism During Murine CandidiasisK08AI060641 · NIAID · LUNDQUIST INSTITUTE FOR BIOMEDICAL INNOVATION AT HARBOR-UCLA MEDICAL CENTER · PI SPELLBERG, BRAD J · 2004 to 2008
$625k
NIAID NIH HHS K08 AI060641NIAID NIH HHS R01 AI072052
6 · The paper itself

Abstract

backgroundThe United States Food and Drug Administration requires clinical trial noninferiority margins to preserve a fraction (eg, 50%) of the established comparator drug's efficacy versus placebo. Lack of placebo-controlled trials for many infections complicates noninferiority margin justification for and, hence, regulatory review of new antimicrobial agents. Noninferiority margin clarification is critical to enable new antimicrobial development. In the absence of placebo-controlled trials, we sought to define the magnitude of efficacy of antimicrobial agents and resulting noninferiority margins for studies of complicated skin and skin-structure infection (SSSI).

methodsWe systematically reviewed literature on complicated SSSI published during 1900-1950 (before widespread penicillin resistance) to define treatment outcomes and confidence intervals (CIs). Antimicrobial efficacy was calculated as the lower limit CI of the cure rate with antimicrobials minus the upper limit CI of the cure rate without antimicrobials.

resultsWe identified 90 articles describing >28,000 patients with complicated SSSI. For cellulitis/erysipelas, cure rates were 66% (95% CI, 64%-68%) without antibiotics and 98% (95% CI, 96%-99%) for penicillin-treated patients, and penicillin reduced mortality by 10%. Cure rates for wound/ulcer infections were 36% (95% CI, 32%-39%) without antibiotics and 83% (95% CI, 81%-85%) for penicillin-treated patients. For major abscesses, cure rates were 76% (95% CI, 71%-80%) without antibiotics and 96% (95% CI, 94%-98%) for penicillin-treated patients; penicillin reduced mortality by 6%.

conclusionSystematic review of historical literature enables rational noninferiority margin justification in the absence of placebo-controlled trials and may facilitate regulatory review of noninferiority trials. Noninferiority margins of 14% for cellulitis/erysipelas, 21% for wound/ulcer infections, and 7% for major abscesses would preserve >or= 50% of antibiotic efficacy versus placebo for these complicated SSSI subsets.

Indexed as

Drug ApprovalAnti-Infective AgentsBacteriaHumansRandomized Controlled Trials as TopicSkin Diseases, BacterialTreatment OutcomeUnited StatesAnti-Infective Agents

Identifiers

PMID19555285
PMCPMC2808402

What OpenQuestion holds

Textmetadata
LicenceTDM
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.