Sensitivity analysis.

In the FM group, we chose 3 relatively high-quality studies (score ≥4) to carry out the sensitivity analysis. 1: Angle SNA. The FM treatment group presented a greater increase in SNA than the controls (MD = 1.75, 95% CI = 1.53–1.97, P < 0.00001). 2: Angle SNB. The FM treatment group presented a greater decrease in SNB than the untreated controls (MD = -1.54, 95% CI = -2.29–-0.80, P < 0.0001). 3: Angle ANB. The FM treatment group presented a greater increase in ANB than the controls (MD = 3.51, 95% CI = 2.99–4.03, P < 0.00001). 4: Angle SN/GoGn. The FM treatment group presented a greater increase in SN/GoGn than the controls (MD = 1.44, 95% CI = 0.21–2.68, P = 0.02). The sensitivity analysis results were consistent with previous results.