Scripties UMCG - Rijksuniversiteit Groningen
 
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Afname in depressieklachten gaat gepaard met verbetering van subjectieve slaapkwaliteit, maar met verslechtering van objectieve slaapkwaliteit

(2019) Busz, K.A.J. (Kornelis)

Introduction – Depression is a common condition that is the leading cause of disability worldwide and is often accompanied by sleep problems. Sleep can be examined in a subjective and objective way with questionnaires and actigraphy. Research has shown that sleeping problems increase the risk of depression and maintain depression. However, the way sleep changes in people recovering from depression, measured in both objective and subjective ways is still insufficiently studied.
Research question – Do subjective and objective sleep quality change when people with depressive symptoms recover from their symptoms?
Methods and materials – Subjective and objective sleep variables of fourteen participants, who showed improvement in depressive symptoms over a period of four months, were collected from the database of the TRANS-ID Recovery project. Sleep efficiency and total sleep duration obtained by actigraphy and subjective sleep quality obtained by daily diary questions, have been examined with a paired t-test and a Cohen’s d effect size has been calculated.
Results – Analysis showed using a t-test (n = 14), sleep efficiency was found to decrease significantly with a large effect size (t (13) = 2.83, p = 0.014, Cohen’s d = 0.76). The improvement in subjective sleep quality was marginally significant (t (13) = -2.08, p = 0.058, Cohen’s d = 0.56).
Discussion - In conclusion, this pilot study suggests that people with depressive symptoms experience improvement in subjective sleep quality during recovery of these symptoms, but a decrease of objective sleep quality. Follow-up studies, with a larger sample size, to discover the underlying mechanisms of this decline in objective sleep quality are necessary.






 
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