Table 4.

Summary of findings comparing the effects of microcurrent therapy and sham microcurrent therapy

Outcome	Sample Size (Studies)	Treatment Effect (95% CI)	Level of Evidence (GRADE)
Shoulder pain Follow-up: 6 wk	n=40 (1 × RCT)	−8.0 (−14.7 to −1.33) mm	Moderate*
Low back pain Follow-up: 10 wk	n=10 (1 × RCT)	−1.9 (−19.6 to 15.8) mm	Low*,†
Knee pain Follow-up: 4 wk	n=52 (1 × RCT)	−12.7 (−24.2 to −1.2) mm	High

Abbreviation: CI, confidence interval.

^⁎Downgraded for risk of bias (overall grade of “some concerns”).

^†Downgraded for imprecision (sample size is smaller than the optimal information size; n=890).