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Change in daily life behaviors and depression: Within-person and between-person associations.

OBJECTIVE
This study examined associations between daily physical, sedentary, social, and leisure behaviors and depressive symptoms (a) at a macrolevel, over the course of an Experience Sampling (ESM) self-monitoring intervention, and (b) at a microlevel, by examining daily within-person associations. Second, we examined the effects of the ESM self-monitoring intervention on these daily life behaviors.


METHODS
Individuals with a diagnosis of depression (N = 102) receiving pharmacological treatment were randomized to 1 of 2 six-week ESM intervention conditions or a control condition. Physical, sedentary, social, and leisure behaviors as well as depressive symptoms were assessed prospectively in every-day life at baseline, postintervention, and during the ESM interventions.


RESULTS
Change in physical activity and talking from baseline to postintervention was associated with change in depressive symptoms from baseline to postintervention. Within-person daily fluctuations in talking, physical activity, doing nothing/resting, and being alone predicted end-of-day depressive symptoms over and above depressive symptoms at the previous day. The ESM interventions contributed to change in talking, doing nothing/resting, and being alone over time in comparison with the control group. The analyses revealed individual differences in the amount of behavioral change over time and in the within-subject associations between daily behaviors and depressive symptoms.


CONCLUSIONS
The findings suggest that physical, sedentary, and social behaviors have affective implications for daily mental health of individuals with depression. Self-monitoring using ESM may be a useful add-on tool to achieve behavioral change and to gain personalized insight in behaviors that improve daily depressive symptoms.