Figure 3. Association between PAP use (averaged over 6 months) and change in PCL-S score from baseline to 6-month follow-up.

Neither average hours per night of PAP use (A) nor percentage of nights with > 4 h of PAP use (B) significantly predicted a change in PCL-S score (p = 0.061 and p = 0.069, respectively). Increasing percentage of nights with PAP use was found to modestly predict improvement in PCL-S score (C) (p = 0.023; R² = 0.191; B = −0.146).