Research Article

The Efficacy of Twin-Block Appliances for the Treatment of Obstructive Sleep Apnea in Children: A Systematic Review and Meta-Analysis

Figure 4

Pooling for apnea-hypopnea index (AHI) (a) and lowest arterial oxygen saturation (Lowest SaO2) (b), which patients were definitely diagnosed as mandibular retraction. AT: adenotonsillectomy.
(a)
(b)