Suicide Risk in Older Adults: The Role and Responsibility of Primary Care
Risk Factors for Older Adult Suicide
Numerous reviews exist that cover many risk factors for suicide in older adults [18,28]. This article will focus briefly on risk factors that are likely to be recognized and potentially addressed by primary care practitioners. Risk factors that apply across the lifespan can be recalled through a mnemonic: IS PATH WARM [29]. These risk factors include suicide Ideation, Substance abuse, Purposelessness, Anxiety (including agitation and poor sleep), feeling Trapped, Hopelessness, social Withdrawal, Anger or rage, Recklessness (ie, engaging in risky activities), and Mood changes. The National Suicide Prevention Lifeline also includes being in unbearable physical pain, perceiving one’s self as a burden to others, and seeking revenge on others as risk factors [30]. More specific to older adults, Conwell notes 5 categories or domains of risk factors with strong research support: psychiatric symptoms, somatic illness, functional impairment, social integration, and personality traits and coping [18,31].
Affective or mood disorders, particularly depression and depressive symptoms, are some of the most well-studied and strongest risk factors for older adult suicide [31]; 71% to 97% of all older adults who die by suicide have psychiatric illnesses [28]. Mood disorders, including major depressive episodes, are most consistently linked to older adult suicide risk; there is evidence as well for anxiety disorders and substance abuse disorders as risk factors, though it is somewhat mixed [28]. Therefore, screening for depression, anxiety, and substance abuse may be key to recognizing potential suicide risk. However, depression and anxiety do not present similarly in younger and older adults [32,33]. Depressive symptoms in older adults may be more somatic (eg, agitation, gastrointestinal symptoms) [32] and may reflect more anhedonia than mood changes [33]. Anxiety in older adults tends to be reported as stress or tension, whereas younger adults report feeling anxious or worried [33]. Additionally, substance abuse is often underrecognized, underdiagnosed, and undertreated in older adults [34]. Proactive screening for substance abuse is important as it may not interfere with work or other obligations in older adults, and therefore substance abuse may not be identified by older adults or others in their lives.
Physical illness may also be a risk factor for suicide [28,31]. Numerous diagnoses have been linked to suicide risk, including cancers, neurodegenerative diseases (eg, amyotrophic lateral sclerosis, Huntington disease), spinal cord injury, cardiovascular disease, and pulmonary disease [28,35]. However, overall illness burden (ie, number of chronic illnesses) [28] and self-perceived health [36] appear to be stronger risk factors than any specific illness. Additionally, authors have suggested that illness itself may not be a particularly strong risk factor, but the effect of illness on depressive symptoms [35], functioning, pain, or hopelessness due to the potential for decline over time [28] may increase suicide risk in older adults. Pain itself has been identified as a risk factor for suicide, as have perceptions of burden to others, hopelessness, and functional impairment [28].
In terms of functional impairment, research has shown that impairment in completing instrumental activities of daily living is associated with higher risk for death by suicide, and cognitive impairment may also be associated with elevated suicide risk [28]. However, there are some discrepant findings regarding the role of dementia in suicide risk, which may reflect medical and psychiatric comorbidities, as well as different stages of dementia or levels of cognitive impairment (eg, hopelessness about cognitive decline may increase suicide risk shortly after diagnosis, whereas lack of insight may decrease risk later in the course of the illness) [37]. Related to functional or cognitive impairment is perceived burdensomeness (ie, the perception that one is a liability or burden to others, to the point that others would be better off if one was gone) [38], which may also be associated with suicide risk in older adults [39,40]. Researchers have found that the interaction between perceived burdensomeness and thwarted belongingness (ie, a belief that one lacks reciprocal caring relationships and does not belong) identified older adults who were likely experiencing suicide ideation but did not report it [41]. These findings indicate that perceived burdensomeness and thwarted belongingness may be key in identifying older adults at risk for suicide.
Thwarted belongingness has also been linked to suicide ideation in older adults [41]. In fact, studies suggest that social integration is especially important for reducing suicide risk in this population [28,31,42]. A larger social network, living with others, and being active in the community are each protective against suicide [28]. Bereavement, which can reduce social connectedness and acts as a significant life stressor, is also an important risk factor [31]. Retirement may also reduce social connectedness, and employment changes have been identified as a suicide risk factor for older adults [28]. Retirement has been linked to risk for death by suicide in this population [43], and may not only serve to reduce social connectedness, but for some older adults may also be a significant role loss or loss of sense of purpose that can influence suicide risk.
