Threshold and subthreshold generalized anxiety disorder in later life
- Authors: Miloyan, Beyon , Byrne, Gerard , Pachana, Nancy
- Date: 2015
- Type: Text , Journal article
- Relation: American Journal of Geriatric Psychiatry Vol. 23, no. 6 (2015), p. 633-641
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- Description: Objective Symptoms and disorders of anxiety are highly prevalent among older adults; however, late-life anxiety disorders remain underdiagnosed. The objective of this study was to (1) estimate the prevalence of late-life threshold and subthreshold generalized anxiety disorder (GAD), (2) examine sociodemographic and health correlates associated with membership in these groups, (3) assess 3-year conversion rates of these groups, and (4) explore characteristics associated with 3-year conversion to GAD. Methods Using Waves 1 and 2 of the National Epidemiological Survey of Alcohol and Related Conditions, 13,420 participants aged 55-98 years were included in this study. Results Subthreshold GAD was more highly prevalent than threshold GAD and was interposed between asymptomatic and GAD groups in terms of severity of health characteristics. Although most participants with subthreshold and threshold GAD were asymptomatic by Wave 2, differences in disability persisted. Subthreshold GAD at baseline was not a predictor of threshold GAD at follow-up. Conclusion These findings suggest that late-life GAD should be conceptualized as a dimensional rather than categorical construct. The temporal stability of anxiety-associated disability further suggests that subthreshold GAD bears clinical significance. However, the suitability and efficacy of interventions for minimizing negative sequelae in this group remain to be determined.
Age-related changes in generalized anxiety disorder symptoms
- Authors: Miloyan, Beyon , Byrne, Gerard , Pachana, Nancy
- Date: 2014
- Type: Text , Journal article
- Relation: International Psychogeriatrics Vol. 26, no. 4 (2014), p. 565-572
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- Description: Background: Little is known about the effects of age on the symptoms of anxiety disorder. Accordingly, this study sought to investigate age-related differences in the number and kind of symptoms that distinguish between individuals with and without a diagnosis of generalized anxiety disorder (GAD). Methods: A sample of 3,486 self-reported worriers was derived from Wave 1 of the National Epidemiological Survey of Alcohol and Related Conditions (NESARC), an epidemiological survey of mental health conducted in the USA in 2001-2002. Participants were stratified into the following age groups (18-29 years, 30-44 years, 45-64 years, 65-98 years), and then divided into diagnostic groups (GAD and non-GAD worriers). Results: Binary logistic regression analyses revealed that four distinct sets of symptoms were associated with GAD in each age group, and that numerically fewer symptoms were associated with GAD in older adults. Moreover, there were graduated changes in the type and number of symptoms associated with GAD in each successive age group. Conclusions: There are graduated, age-related differences in the phenomenology of GAD that might contribute to challenges in the detection of late-life anxiety. © International Psychogeriatric Association 2014.