Crowe, E., Daly, M., Delaney, L., Carroll, S. and Malone, K. M. (2019) The intra-day dynamics of affect, self-esteem, tiredness, and suicidality in Major Depression. Psychiatry Research, 279, pp. 98-108. (doi: 10.1016/j.psychres.2018.02.032) (PMID:29661498)
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Abstract
Despite growing interest in the temporal dynamics of Major Depressive Disorder (MDD), we know little about the intra-day fluctuations of key symptom constructs. In a study of momentary experience, the Experience Sampling Method captured the within-day dynamics of negative affect, positive affect, self-esteem, passive suicidality, and tiredness across clinical MDD (N= 31) and healthy control groups (N= 33). Ten symptom measures were taken per day over 6 days (N= 2231 observations). Daily dynamics were modeled via intra-day time-trends, variability, and instability in symptoms. MDD participants showed significantly increased variability and instability in negative affect, positive affect, self-esteem, and suicidality. Significantly different time-trends were found in positive affect (increased diurnal variation and an inverted U-shaped pattern in MDD, compared to a positive linear trend in controls) and tiredness (decreased diurnal variation in MDD). In the MDD group only, passive suicidality displayed a negative linear trend and self-esteem displayed a quadratic inverted U trend. MDD and control participants thus showed distinct dynamic profiles in all symptoms measured. As well as the overall severity of symptoms, intra-day dynamics appear to define the experience of MDD symptoms.
| Item Type: | Articles |
|---|---|
| Additional Information: | This research was funded by a grant from the Irish Research Council. |
| Keywords: | Circadian rhythms, daily symptom dynamics, depression, emotional instability / variability, Experience Sampling Method (ESM) / Ecological Momentary Assessment (EMA) |
| Status: | Published |
| Refereed: | Yes |
| Glasgow Author(s) Enlighten ID: | Crowe, Eimear |
| Authors: | Crowe, E., Daly, M., Delaney, L., Carroll, S., and Malone, K. M. |
| College/School: | College of Medical Veterinary and Life Sciences |
| Journal Name: | Psychiatry Research |
| Publisher: | Elsevier |
| ISSN: | 0165-1781 |
| ISSN (Online): | 1872-7123 |
| Published Online: | 21 February 2018 |
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