Strength of Recommendation and Quality of Evidence Category/Grade Definition Strength of Recommendation A B
C
Quality of Evidence I
II III
Good evidence to support a recommendation for or against use. Moderate evidence to support a recommendation for or against use. Poor evidence to support a recommendation.
Evidence from ≥ 1 properly randomized, controlled trial.
Evidence from ≥ 1 well-designed clinical trial, without randomization; from cohort or case-controlled analytic studies (preferably from > 1 center); from multiple time-series; or from dramatic results of uncontrolled experiments.
Evidence from opinions of respected authorities, based on clinical experience, descriptive studies, or reports of expert committees.
Abbreviations CA-ASB, catheter-associated asymptomatic bacteriuria; CA-UTI, catheter-associated urinary tract infection; cfu, colony-forming units
Source
Hooton TM, Bradley SF, Cardenas DD, Colgan R, Geerlings SE, Rice JC, Saint S, Schaeffer AJ, Tambayh PA, Tenke P, Nicolle LE; Infectious Diseases Society of America. Diagnosis, prevention, and treatment of catheter-associated urinary tract infection in adults: 2009 International Clinical Practice Guidelines from the Infectious Diseases Society of America. Clin Infect Dis. 2010 Mar 1;50(5):625-63. [PMID: 20175247]
Disclaimer
This Guideline attempts to define principles of practice that should produce high-quality patient care. It focuses on the needs of primary care practice, but also is applicable to providers at all levels. This Guideline should not be considered exclusive of other methods of care reasonably directed at obtaining the same results. The ultimate judgement concerning the propriety of any course of conduct must be made by the clinician aſter consideration of each individual patient situation. Neither IGC, the medical associations, nor the authors endorse any product or service associated with the distributor of this clinical reference tool.
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