Light room therapy effective in mild forms of seasonal affective disorder - a randomised controlled study
2008 (English)In: Journal of Affective Disorders, ISSN 0165-0327, E-ISSN 1573-2517, Vol. 108, no 3, 291-296 p.Article in journal (Refereed) Published
BACKGROUND: The most common way to provide bright light therapy to Swedish patients with Seasonal Affective Disorder (SAD), is treatment in a light therapy room. Since few studies have evaluated treatment provided in this setting and few have evaluated the effect of bright light in sub-clinical SAD (S-SAD), such a study including a one-month follow-up was designed. METHODS: Fifty adults recruited from a previous prevalence study and clinically assessed as having SAD or S-SAD, were randomised to treatment in a light room or to a three-week waiting-list control group. The Hamilton Depression Rating Scale-Seasonal Affective Disorders Self-rating 29-items Version (SIGH-SAD/SR) was used to measure depressive mood at baseline, directly following treatment and at the one-month follow-up. RESULTS: ANCOVA with adjustment for baseline depression score, showed a significant main effect for the light room therapy group (p<0.001). Fifty-four percent (n=13/24) improved > or = 50% while no such improvement was seen in the control condition (n=0/24). After merging the two groups, repeated measures ANOVA confirmed the experimental analysis (p<0.001). At the one-month follow-up, 83.0% (n=39/47) had improved > or = 50% and 63.8% (n=30/47) had normal depression scores, i.e. < or = 8. CONCLUSIONS: Light room therapy was effective in reducing depressive symptoms in subjects with winter depressive mood. Results were maintained over a period of one month.
Place, publisher, year, edition, pages
2008. Vol. 108, no 3, 291-296 p.
Bright light therapy, Light room therapy, Randomised controlled trial, SAD, S-SAD, SIGH-SAD/SR
Medical and Health Sciences
IdentifiersURN: urn:nbn:se:uu:diva-98089DOI: 10.1016/j.jad.2007.10.009ISI: 000256769600013PubMedID: 18053580OAI: oai:DiVA.org:uu-98089DiVA: diva2:173268