Buijze, A.L.F. (Anna) (2014) Invloed van een korte lichtblootstelling op de stemming van vrouwen met premenstruele klachten. thesis, Medicine.
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Abstract
Background: Premenstrual symptoms such as mood depression and irritability are a serious burden affecting daily life in 5-8% of women. Treatment with intensive light therapy has been proved to show a significant decrease of the premenstrual symptoms. Current light therapy for premenstrual symptoms consists of treatment with bright light (10.000 lx) at least 30 minutes a day, for a minimum of one week. Aim: The aim of the study was to investigate an acute effect of the light therapy after a single light exposure. The hypothesis stated that a single short light exposure of 30 minutes improved the mood of women with premenstrual symptoms. Design: This study was conducted as a randomized, placebo-controlled, clinical trial. Method: Women with premenstrual symptoms were assorted over a control group with Dim Light (200 lx, n=22) and an intervention group with Bright Light (5.000 lx, n=23). Both the control group and the intervention group underwent the same procedure differing only in light intensity. Two questionnaires were administered directly before (T1), after (T2) and 60 minutes after the light exposure to assess changes in mood. The two questionnaires were the PANAS with variables for Positive Affect and Negative Affect and the Affect Grid with variables for Valence and Arousal. Results: With the RM ANOVA, no significant difference was found between the mood questionnaires of women who underwent the two light conditions. Other variables such as the PSST, QIDS and the GSS were also included in the moderator analysis. The interaction of the variables with condition was investigated but showed no significant difference between the two light conditions. Conclusion: A 30 minute, single light exposure with Bright Light showed no significant effect when compared to Dim Light on the mood of women with premenstrual symptoms.
| Item Type: | Thesis (Thesis) |
|---|---|
| Supervisor name: | Rot, Marije aan het and Meesters, Ybe |
| Faculty: | Medical Sciences |
| Date Deposited: | 25 Jun 2020 11:03 |
| Last Modified: | 25 Jun 2020 11:03 |
| URI: | https://umcg.studenttheses.ub.rug.nl/id/eprint/2355 |
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