Table 1.

Recommendations of grades for specific clinical preventive actions

Source: Canadian Task Force on Periodic Health Examination. The Canadian guide to clinical preventive health care. Ottawa, Canada: Health Canada, 1994.
A The CTF concludes that there is good evidence to recommend the clinical preventive action.
B The CTF concludes that there is fair evidence to recommend the clinical preventive action.
C The CTF concludes that the existing evidence is conflicting and does not allow making a recommendation for or against use of the clinical preventive action; however, other factors may influence decision-making.
D The CTF concludes that there is fair evidence to recommend against the clinical preventive action.
E The CTF concludes that there is good evidence to recommend against the clinical preventive action.
I The CTF concludes that there is insufficient evidence (in quantity and/or quality) to make a recommendation; however. other factors may influence decision-making.
The CTF recognizes that in many cases patient-specific factors need to be considered and discussed, such as the value the patient places on the clinical preventive action; its possible positive and negative outcomes; and the context and/or personal circumstances of the patient (medical and other). In certain circumstances where the evidence is complex, conflicting, or insufficient, a more detailed discussion may be required.