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Current affairs and the public psyche: American anxiety in the post 9/11 world

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Abstract

Background

The most recent wave of interviews in a longitudinal study spanned the terrorist attacks of September 11, 2001. This unintended “natural experiment” allows examination of effects of traumatic events in ways impossible in studies conducted solely after the event and in populations not previously studied.

Methods

Participants were 610 members of the randomly selected Children in the Community cohort studied longitudinally for over 25 years and between ages 27 and 38 at the time of the current in-home interviews. Symptoms of generalized anxiety, post-traumatic stress disorder, panic disorder, agoraphobia, dissociation, and depression were assessed with an adaptation of the Structured Clinical Interview for Diagnosis. Changes in self-reported symptoms from an assessment 10 years earlier were related to the date of interview between 7/2001 and 12/2003 by polynomial regression methods, including demographic and design controls. Diagnoses based on clinical follow-up were also examined.

Results

In contrast to other data on this cohort where timing effects were absent, levels of symptoms were related to time of interview. The months following 9/11/2001 and the two anniversary periods in 2002 and 2003 showed significant elevation in anxiety symptoms (t = 2.50, df = 608, P = 0.013) with some evidence of elevated anxiety disorder as well (Fisher’s exact test P = 0.096). Similar patterns were seen for specific anxiety and depressive symptom groups. Effects of religious participation, patriotism, having offspring, and media exposure on anxiety symptoms tended to differ by season, but the effect of community involvement did not. Proximity to New York City was not significantly related to symptoms.

Conclusions

Study findings suggest that young Americans showed symptomatic and, possibly, diagnostic anxiety reactions to the events of 9/11 that persisted in response to heightened awareness of ongoing threat during anniversary periods.

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Notes

  1. For these analyses the number of aggregate symptoms of anxiety was extremely skewed. In order to comply with model assumptions data originally ranging from 0 to 48 was transformed by pulling in outliers, taking the square root of the resulting counts plus 1.0, and then subtracting 1 in order that reasonable normality characterized the resulting range from 0 to 5.4. All analyses were carried out both on transformed and original symptom counts, with no differences in substantive conclusions. Graphic presentation of overall anxiety symptoms translate the analysis of transformed values back into symptom counts. Depressive symptoms and symptoms of individual anxiety disorders were not extremely skewed and analyses are carried out on original symptom counts

  2. An alternative method of analysis would have been spectral analysis, see Kovlenko, p 107. However, this method assumes that the curves will be constant over the period of assessment. Priestly MB (1983) Spectral Analysis and Time Series. Academic Press, New York

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Correspondence to Patricia Cohen PhD.

Additional information

Funding/Support: This study was supported by NIMH grant MH-60911, Patricia Cohen, P.I., NIDA 03188, Judith Brook, P.I. and by the New York State Office of Mental Health.

Role of sponsor: NIMH and NIDA did not contribute in any way to the design and conduct of the study, to the collection, analysis and interpretation of data, or to the preparation, review or approval of the manuscript.

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Cohen, P., Kasen, S., Chen, H. et al. Current affairs and the public psyche: American anxiety in the post 9/11 world. Soc Psychiat Epidemiol 41, 251–260 (2006). https://doi.org/10.1007/s00127-006-0033-7

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  • DOI: https://doi.org/10.1007/s00127-006-0033-7

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