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Stressful life events in anxious and depressed children
Douglas E Williamson1, Boris Birmaher, Ronald E Dahl
1Department of Psychiatry, University of Pittsburgh School of Medicine, Western Psychiatric Institute and Clinic, Pittsburgh, Pennsylvania 15213, USA. Williamson DE@upmc.edu
Insights
Depressed children, especially females, experience more stressful life events, often beyond their control. These events, particularly loss-related, may be specific to childhood depression and do not appear to affect the HPA axis.
Area of Science:
- Child and Adolescent Psychiatry
- Developmental Psychology
- Stress and Health Research
Background:
- Childhood anxiety and depression are significant public health concerns.
- Stressful life events are implicated in the etiology and maintenance of pediatric mental health disorders.
- Understanding the specific types and prevalence of stressful life events in anxious versus depressed children is crucial for targeted interventions.
Purpose of the Study:
- To investigate the frequency and nature of stressful life events in children diagnosed with anxiety disorders and depression.
- To compare the occurrence of stressful life events between anxious children, depressed children, and healthy controls.
- To explore the relationship between stressful life events and cortisol secretion around sleep onset in these pediatric groups.
Main Methods:
- A cohort of children aged 6-12 years, including those with anxiety disorders (n=20), depression (n=45), and normal controls (n=11), were recruited.
- The Life Events Record tool was administered to assess stressful life events.
- Plasma cortisol levels were measured via an indwelling catheter at 20-minute intervals during the 1-2 hour window preceding sleep onset.
Main Results:
- Depressed children reported significantly more stressful life events than both anxious and control children.
- Events independent of the child's behavior, particularly loss events, were more prevalent in depressed children.
- Depressed females showed a higher incidence of overall and independent stressful events compared to females in the anxious and control groups.
- No significant impact of stress on cortisol secretion around sleep onset was observed across all groups.
Conclusions:
- Stressful life events, especially those beyond a child's control, are more common in depressed children, particularly females.
- Loss-related events may serve as a specific indicator for depression in children.
- The hypothalamic-pituitary-adrenal (HPA) axis in children does not appear to be affected by stress in the context of anxiety or depression.
- Further research is needed to elucidate the temporal dynamics, severity, and specific types of stressful life events in relation to childhood anxiety and depression onset and persistence.
Objective:
The aim of this study was to examine the occurrence of stressful life events in anxious and depressed children.
Method:
Children (6-12 years of age) with an anxiety disorder (n = 20), depression (n = 45), and normal controls (n = 11) were assessed using the Life Events Record. Cortisol was assessed from plasma samples collected every 20 minutes from an indwelling catheter in the one and two hour window around sleep onset.
Results:
Depressed children had significantly more events and events that were most likely independent of the child's behavior, compared to both the anxious and normal control children. Independent loss events were significantly more prevalent among the depressed children in the preceding year, compared to anxious children, with a trend toward more loss events compared to the normal controls. For both overall events and independent events, depressed females were significantly more likely to be exposed to stressful environments compared to anxious and normal control females. There were no effects of stress on cortisol secretion around sleep onset.
Conclusions:
The results of this study suggest that stressful life events are significantly more likely to occur in depressed children, particularly females, compared to anxious children, and that these events are predominantly characterized by independent events outside of the child's control. The results also suggest that loss events may be specific for depression in children. Interestingly, stress does not appear to impact the HPA axis in children, which is true for anxious, depressed, and normal control children. The temporal occurrence and severity, as well as the type of stressful life events as they relate to the onset and maintenance of anxiety and depression in children, need to be more fully explored.
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