II. Strength of Recommendation

  1. Rating A: Good Evidence to Support
    1. Pap Smear for Cervical Cancer
    2. Mammogram for Breast Cancer after age 50 years
  2. Rating B: Fair Evidence to Support
    1. Fecal Occult Blood Testing for Colorectal Cancer
  3. Rating C: Insufficient Evidence to Recommend
    1. Mammogram for Breast Cancer age 40-49 years
  4. Rating D: Fair Evidence Against
    1. Prostate Specific Antigen for Prostate Cancer
    2. Chest XRay for Lung Cancer
  5. Rating E: Good Evidence Against

III. Quality of Evidence

  1. Level I
    1. Evidence from 1 or more randomized controlled trials
  2. Level II-1
    1. Evidence from controlled trials, but no randomization
  3. Level II-2
    1. Evidence from cohort or case-control studies
  4. Level II-3
    1. Evidence from multiple time or historic controls
  5. Level III
    1. Expert opinion based on clinical experience

IV. References

  1. (1996) USPSTF Clinical Preventative Services, 2d ed

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