Zvi D. Gellis, PhD, University of Pennsylvania
Stanley G. McCracken, PhD, University of Chicago.
This review of the literature on late life anxiety was undertaken to determine the extent of the problem, and the effectiveness of various psychosocial and pharmacological treatments. The term effectiveness is defined here as producing or capable of producing a desired effect in a controlled study. The review consists of systematic reviews, meta-analyses, other reviews of the literature, experimental, quasi-experimental designs, and case studies with older adults (65+) as participants, reported in English language peer-reviewed journals. Keyword terms included aged, aging, elderly, geri*, older adult, senior, anxiety, anxious, anxiety disorder, intervention, treatment, and randomized controlled trials. We conducted searches on the following databases: PubMed (1990-2007/March); PsychINFO (1972-2007); Ageline (1978-2007); Social Work Abstracts (1977-2006/December); and Social Sciences Abstracts (1983-2007). Relevant journals were hand searched to identify recent publications that would not have been cited or indexed. Unpublished literature was not included in the review
Epidemiological evidence suggests that anxiety is a common and major problem in later life, yet it has received less attention than depressive disorders have. Anxiety disorders are often associated with common age-related medical and chronic conditions such as asthma, thyroid disease, coronary artery disease, dementia, and sensory loss (Diala & Muntaner, 2003). Anxiety in later life has been identified as a risk factor for greater disability among older adults in general and has also been associated with less successful recruitment into and outcomes of geriatric rehabilitation services (Bowling, Farquhar, & Grundy, 1996). Researchers and practitioners are beginning to recognize that aging and anxiety are not mutually exclusive; anxiety is as common in the old as in the young, although how and when it appears is distinctly different in older adults. Additionally, there is a need for more effectiveness research on evidence-based treatments for late life anxiety (Mitte, 2005).
Recognizing an anxiety disorder in an older person poses several challenges. Aging brings with it an increased risk for certain medical conditions, realistic concern about physical problems, and a high use of prescription medications. As a result, separating a medical condition from physical symptoms of an anxiety disorder is complicated in the older adult. Diagnosing anxiety in individuals with dementia can be difficult, too: agitation typical of dementia may be difficult to separate from anxiety, impaired memory may be interpreted as a sign of anxiety or dementia, and fears may be excessive or realistic depending on the person's situation.
Although anxiety disorders, like most psychiatric conditions, may be less common among older adults than among younger people, epidemiological evidence suggests that anxiety is a major problem in late life (Salzman & Lebowitz, 1991; U.S. Department of Health & Human Services, 1999). One study involving interviews with nearly 6000 people nationwide reported a lifetime rate of 15.3% for DSM-IV-diagnosed anxiety disorders in respondents over age 60 (Kessler et al., 2005). Another study of approximately 500 community-dwelling tri-ethnic elders reported prevalence rates of 11.3% in blacks, 12.4% in Hispanics, and 21.6% in non-Hispanic whites age 75 and older (Ostir & Goodwin, 2006). Myers and colleagues (1984) reported a 6-month prevalence of anxiety disorders in late life ranging from 6.6% to 14.9% across three Epidemiologic Catchment Area (ECA) sites. Comparable data from the Netherlands indicated a prevalence of 10.2% (Beekman et al., 1998). Anxiety disorders overall appear to be the most common class of psychiatric disorders among older people, more prevalent than depression or severe cognitive impairment (Beekman et al., 1998; Kessler et al., 2005; Regier et al., 1988).
Phobias and Generalized Anxiety Disorders (GADs) account for most anxiety disorders in late life (Beekman, van Balkom, Deeg, van Dyck, & van Tilburg, 2000; LeRoux, Gatz, & Wetherell, 2005). Recent reviews summarized the prevalence of specific anxiety disorders in older community-based epidemiological samples as follows: phobias, including agoraphobia and social phobia, 0.7-12.0%; GAD, 1.2-7.3%; obsessive-compulsive disorder, 0.1-1.5%; and panic disorder, 0.0-0.3% (Alwahhabi, 2003; Beekman et al., 1998; Beekman et al., 2000; Krasucki, Howard, & Mann, 1998). Prevalence of GAD in older adults was estimated at 1.9% in the ECA sample and 7.3% in the Dutch sample (Beekman et al., 1998; Beekman et al., 2000; Blazer, 1997). Among people 55 years of age and older, Douchet, LaDouceur, Freeston, and Dugas (1998) found that 12.8% met criteria for GAD. By comparison, ECA prevalence rates for older adults were 1.8% for major depression, 2.8% for dysthymia, and 4.9% for severe cognitive impairment (Blazer, 1997; Regier et al., 1988).
The prevalence of clinically significant anxiety, including symptoms that do not meet criteria for a specific disorder, is common among older adults and may be as high as 20-29% (Davis, Moye, & Karel, 2002; Lenze et al., 2005). This includes anxiety symptoms associated with common medical conditions such as asthma, thyroid disease, coronary artery disease, and dementia, as well as adjustment disorders following significant late life stressors such as bereavement or caregiving. There is also controversy over whether the prevalence of anxiety has been accurately determined in older adults, because DSM-IV criteria may not fit well with this population, anxiety symptoms may be expressed as somatic features or behavior changes (e.g., aggression, assaultive behaviors), and the clinical presentation of anxiety in late life may be more likely to include depressive symptoms (Beck & Averill, 2004; Diefenbach & Goethe, 2006; Fuentes & Cox, 1997; Kim, Braun, & Kunik, 2001; Palmer, Jeste, & Sheikh, 1997).
The high comorbidity of anxiety with medical illness is multidimensional. Anxiety is complex and may be a reaction to a medical illness, may be expressed as somatic symptoms, or may be a side effect of medications. Studies have found an association between anxiety and medical illnesses such as diabetes (Blazer, 2003), dementia (Wragg & Jeste, 1989), coronary heart disease (Artero, Astruc, Courtet, & Ritchie, 2006; Kuzbansky, Cole, Kawachi, Vokonas, & Sparrow, 2006), cancer (Deimling, Bowman, Sterns, Wagner, & Kahana, 2006; Goodwin, Zhang, & Ostir, 2004; Ostir & Goodwin, 2006), chronic obstructive pulmonary disease (Karajgi, Rifkin, Doddi, & Kolli, 1990), and Parkinson’s disease (Stein, Heuser, Juncos, & Uhde, 1990). In addition, at least one tri-ethnic study found that anxiety was associated with increased risk for death from all causes in persons 75 years and older (Ostir & Goodwin, 2006).
As with young adults, anxiety in older adults has been found to often co-occur with depression (Beck & Averill, 2004; Beekman et al., 1998; Blazer, 1997). In fact, community survey research has revealed comorbidity of anxiety and depression as high as nearly 50% among older adults (Beekman et al., 2000). In this community study, 25% of older adults with anxiety also had major depression. Related to this, up to 50% of older adults with major depression had a comorbid anxiety disorder (Beekman et al., 2000; Blazer, 2003; Jeste, Hays, & Steffens, 2006). Approximately 20% of older adults with bipolar disorder reported having GAD at some point (Goldstein, Hermann, & Shulman, 2006). Furthermore, anxiety symptoms have been found to lead to depressive symptoms (Wetherell, Gatz, & Pederson, 2001).
The prevalence of anxiety may be higher in primary care settings than in the community at large. Krasucki, Howard, and Mann (1999) have found that, in primary care settings, 30% of older adults present with generalized anxiety symptoms. Distressed older adults seeking help typically present to their primary care physician (Smyer & Gatz, 1995). Older adults with anxiety disorders are less likely than older adults with depression, dementia, or any other mental disorder to receive treatment from a mental health specialist (Ettner & Hermann, 1997). In an analysis of data from the 1997 National Ambulatory Medical Care Survey, a national probability sample survey of physician office visits, anxiety disorder diagnoses were assigned for 1.3% of visits by older patients, with anxiety disorder NOS (Not Otherwise Specified) as the most frequent diagnosis (Stanley, Roberts, Bourland, & Novy, 2001). Because evidence suggests that only approximately one-third of such cases are detected in primary care (e.g., Kessler, Lloyd, Lewis, & Gray, 1999), these data likely represent a substantial underestimate of the prevalence of anxiety in that setting. Furthermore, Levy, Conway, Brommelhoff, and Merikengas (2003) found that, compared to younger adults, older adults tend to minimize and underreport their anxiety symptoms. Thus the number of older adults who experience anxiety may be underestimated (Levy et al., 2003).
There is a dearth of research on anxiety and anxiety disorders in older adults with hearing or visual impairment, with previous studies in this population focusing primarily on depression and functional impairment. However, one recent study by Brenes et al. (2005) found significantly higher levels of anxiety in a national sample of 1,002 older disabled women who reported experiencing visual problems. Overall, it appears that anxiety symptoms and syndromes are quite common in old age and may be detectible at even higher levels in older adults with visual deficits.
The consequences of anxiety in late life are potentially serious. In a prospective investigation, anxiety did not generally remit spontaneously over 2 to 3 years (Livingston, Watkin, Milne, Manela, & Katona, 1997). Hypertension, hypoglycemia, and coronary heart disease can be worsened through chronic stress and anxiety (Hersen & Van Hasselt, 1992). Compared with men reporting no symptoms of anxiety, men in the Normative Aging Study reporting two or more anxiety symptoms had elevated risk of fatal coronary heart disease (Kawachi, Sparrow, Vokonas, & Weiss, 1994). Higher levels of anxiety have been associated with greater use of pain-relieving medications and more postoperative disability days for surgical patients (Taenzer, Melzack, & Jeans, 1986). Anxiety was also related to pain in a sample of nursing home residents (Casten, Parmelee, Kleban, Lawton, & Katz, 1995).
Anxiety symptoms and disorders are associated with increased fatigue, greater levels of chronic physical illness, increased disability, lower levels of well-being, worse life satisfaction, and inappropriate use of medical services among older adults (Martin, Bishop, Poon, & Johnson, 2006; Brenes et al., 2005; de Beurs et al., 1999; Hunt, Issakidis, & Andrews, 2002; Jones, Ames, Jeffries, Scarinci, & Brantley, 2001; Wetherell et al., 2004; Wittchen, Carter, Pfister, Montgomery, & Kessler, 2000). Furthermore, a sample of older adults with GAD reported impairments on quality of life (QOL) measures that were worse than impairments reported by another group of age-matched individuals who had serious medical conditions such as myocardial infarction or type II diabetes (Wetherell et al., 2004). It was also found that the reported QOL impairments for the individuals diagnosed with GAD was comparable to those reported for people with major depression. In cases of comorbid anxiety and depressive disorders, the likelihood of poor outcomes increases. Comorbid anxiety in late-life depression is associated with poor treatment response and increased likelihood of dropout (Lenze, Mulsant, et al., 2003). Also, older people with anxious depression report increased suicidality and reduced psychosocial support (Jeste et al., 2006).
In addition to direct relationships with poorer health care outcomes, anxiety and depression have been associated with markedly higher health care costs among age-matched groups of primary care patients, even after adjustment for medical comorbidity (Simon, Ormel, VonKoff, & Barlow, 1995). During office visits, older adults with anxiety spend 50% more time with their primary care physician than older adults with no psychiatric diagnosis do (Stanley et al., 2001). Taken altogether, these findings support the importance of treatment of anxiety in late life.
In part because of the tendency for older adults to present to primary care physicians, anxiolytic medications, including benzodiazepines, are the most common treatment for late life anxiety (Lenze, Pollock, et al., 2003). ECA data suggests that benzodiazepine use among the elderly is approximately 14%, higher than the rate for younger adults (Swartz, Landerman, George, Melville, Blazer, & Smith, 1991). A community survey of older adults in southern California showed that 20% had used benzodiazepines at least twice in the previous 12 months; these individuals were more than twice as likely as nonusers to take 10 or more drugs (Mayer-Oakes et al., 1993).
Benzodiazepine users are also more likely than nonusers to experience accidents requiring medical attention, due to increased risk of falls, hip fractures, and automobile accidents (Tamblyn, Abrahamowicz, du Berger, McLeod, & Bartlett, 2005). Older patients taking benzodiazepines are also more likely to develop disabilities in both mobility and activities of daily living (ADLs) (Gray et al., 2006). Benzodiazepines can impair memory and other cognitive functions (Wengel, Burke, Ranno, & Roccaforte, 1993). These medications can also cause tolerance and withdrawal, interactions with other drugs, and toxicity (Krasucki et al., 1999; Salzman & Lebowitz, 1991).
Although safer medications than benzodiazepines, particularly selective serotonin reuptake inhibitors (SSRIs), are often used to treat geriatric anxiety, they can cause unpleasant side effects, and some older people prefer not to take them. Furthermore, SSRIs have not completely replaced benzodiazepines as a treatment for anxiety in older people (Keene, Eaddy, Nelson, & Sarnes, 2005). Safe and effective alternative treatments for anxiety that are appealing to an older population are clearly needed.
The efficacy of evidence-based psychosocial interventions has been tested using randomized trials for geriatric anxiety and reviewed with emerging evidence of support for their use (Ayers, Sorrell, Thorp, & Wetherell, 2007) (Level A; see Chapter 1, Introduction for description of Levels).
Several studies have provided some support for the use of relaxation training and cognitive behavior therapy (CBT) for treatment of anxiety (Barrowclough et al., 2001; Gorenstein et al., 2005; Mohlman et al., 2003; Stanley, Beck, et al., 2003; Stanley, Hopko, et al., 2003; Wetherell, Gatz, & Craske, 2003) (Level A). In recent years, CBT has been shown to be superior to waitlist conditions, medication management-only conditions, supportive control conditions (e.g., supportive counseling, minimal contact, discussion group), and usual primary care (Barrowclough et al., 2001; Gorenstein et al., 2005; Mohlman et al., 2003; Stanley, Beck, et al., 2003; Stanley, Hopko, et al., 2003; Wetherell et al., 2003) (Level A). In a study by Gorenstein and colleagues (2005), greater reductions in anxiety were not seen until a 6-month follow-up visit. In some of the other studies, compared to waitlist or supportive control conditions, CBT also provided greater reductions in comorbid depression, as well as improvements in QOL (Barrowclough et al., 2001; Stanley, Beck, et al., 2003; Stanley, Hopko, et al., 2003; Wetherell et al., 2003). However, in a recent study comparing CBT plus medication management with medication management alone, the combined approach was not found to be superior in reducing anxiety, worry, and total distress (Gorenstein et al., 2005). While some studies suggest that CBT is promising for the treatment of anxiety, Stanley, Beck, and Glassco (1996) found no differences between CBT and supportive psychotherapy on anxiety and depression reductions. Finally, in another review by Wetherell, Sorell, Thorp, and Patterson (2005), the authors assert that progressive muscle relaxation, CBT, and even supportive therapy have empirical support for their use in treating geriatric anxiety (Level B). However, the authors report that, when compared to waitlist and supportive control conditions, the psychological treatments with the greatest effect sizes (20 or greater) are relaxation training (for anxiety symptoms) and CBT (for anxiety disorders). These mixed results warrant further understanding and research as to the most effective treatment approaches for late life anxiety.
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