Grading System Strength of Recommendation
Grade 1 = stronga
Grade 2 = weakb a
A = high
Quality of Evidence B = moderate b Grade 2 suggests that individual patient values may lead to different choices. C = low
Grade 1 recommendations are strong and indicate that the benefits do, or do not, outweigh risks, burden, and costs.
Abbreviations ACCP, American College of Chest Physicians; CT, computed tomography; CUS, compression ultrasonography; DVT, deep vein thrombosis; LE, lower extremity; Mod, moderate; MR, magnetic resonance; MRI, magnetic resonance imaging; PE, pulmonary embolism; PTP, pretest probability; US, ultrasonography
Source Bates SM, Jaeschke R, Stevens SM, Goodacre S, Wells PS, Stevenson MD, Kearon C, Schunemann HJ, Crowther M, Pauker SG, Makdissi R, Guyatt GH. Diagnosis of DVT: Antithrombotic Therapy and Prevention of Thrombosis, 9th ed: American College of
Chest Physicians Evidence-Based Clinical Practice Guidelines. Chest. 2012;141(2 Suppl): e351S-e418S.
Disclaimer
This Guideline attempts to define principles of practice that should produce high-quality patient care. It is applicable to specialists, primary care, and 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 judgment 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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