Improvement in Fatigue, Sleepiness, and Health-Related Quality of Life with Bright Light Treatment in Persons with Seasonal Affective Disorder and Subsyndromal SAD
Figure 1
A hierarchical cluster analysis (Ward’s method) of subjects with winter SAD and S-SAD () based on baseline data taken from four measures: the fatigue questionnaire (FQ), the Epworth Sleepiness Scale (ESS), and the two subscales, the HAMD-21 and Atyp-8 (from the depression scale SIGH-SAD/SR).
