FIGURE 2.
36-item Short-Form Health Survey (SF-36) Vitality scores. Unadjusted mean (95% CI) SF-36 Vitality scores by treatment group and sex, highlighting the difference between females and males in treatment response. An increase in score indicates improvement. Statistical analysis of the continuous positive airway pressure (CPAP) group showed that females had a greater improvement in the SF-36 Vitality score than males (mean change 9.4 (95% CI 6.8–12.0) versus 6.0 (95% CI 4.3–7.7); p=0.0343), after adjustments for baseline SF-36 Vitality score and average daily usage (table 4).