Table 2. Rating of Clinical Importance.

Rating	Range
Small	a weighted mean difference (WMD) less than 10% of the scale (e.g., <10 mm on a 100 mm VAS); a standardized mean difference (SMD) or “d” score <0.5; a relative risk of <1.25 or >0.8 (depending on whether the report referred to the risk of benefit or the risk of harm, respectively)
Medium	a WMD from 10–20% of the scale; an SMD or “d” score from 0.5 to 0.8; a relative risk between 1.25 and 2.0 or between 0.5 and 0.8 (depending on the factor described above)
Large	a WMD >20% of the scale; an SMD or “d” score ≥ 0.8; a relative risk >2.0 or <0.5 (depending on the factor described above)