Table 1.

Strength of Recommendation

Strength of recommendation	Interpretation
Strong for	The benefit of the intervention is greater than the harm and the level of evidence is high, which is strongly recommended in most clinical situations.
Weak for	The benefit of the intervention may vary depending on the clinical situation of the intervention or the patient/social value, and is recommended to be used selectively or conditionally.
Strong against	The harm of the intervention is greater than the benefit and the level of evidence is high or the size of effectiveness is unclear and the level of evidence is low, which is recommended not to be used.
Weak against	The harm of the intervention may vary depending on the clinical situation of the intervention or the patient/social value, and is recommended not to be used selectively or conditionally.
Insufficient	Evidence to judge the size of effectiveness of the intervention or the level of evidence is insufficient, and it is not possible to decide whether or not to recommend until further research evidence is accumulated.