Figure 2 Reduction in apnea-hypopnea index (AHI) between baseline and titration studies

Subjects in the therapeutic continuous positive airway pressure (CPAP) group showed a significant reduction in AHI (reduced to 3.1 ± 2.4 events/hour on CPAP from 16.1 ± 8.4 events/hour at baseline) as compared to the sham group (reduced to 18.0 ± 14.9 events/hour on CPAP from 19.4 ± 7.1 events/hour at baseline). The AHI difference on CPAP in the therapeutic and sham CPAP groups was significant (p < 0.0001).