Fig. 2

Sample distribution for PGWBI Total before and after titration. T0 = first time visit; T1 = after CPAP titration. Higher scores indicate better well-being. Chi-square = 110.72; p < 0.0001. At T0: 60 subjects had PGWBI <60; 51 subjects had PGWBI from 60 to 72; 94 subjects had PGWBI >72. At T1: 40 subjects had PGWBI <60; 48 subjects had PGWBI from 60 to 72; 117 subjects had PGWBI >72