{"id":13672,"date":"2017-05-03T19:44:01","date_gmt":"2017-05-03T23:44:01","guid":{"rendered":"https:\/\/staging.observatoireprevention.org\/2017\/05\/03\/social-isolation-an-important-risk-factor-for-premature-death\/"},"modified":"2023-05-25T00:31:03","modified_gmt":"2023-05-25T04:31:03","slug":"social-isolation-an-important-risk-factor-for-premature-death","status":"publish","type":"post","link":"https:\/\/observatoireprevention.org\/en\/2017\/05\/03\/social-isolation-an-important-risk-factor-for-premature-death\/","title":{"rendered":"Social isolation: An important risk factor for premature death"},"content":{"rendered":"\n<p>Several studies have clearly shown that some psychological factors, such as stress anxiety, depression and the lack of adequate social relationships, have a negative impact on health and significantly reduce life expectancy. This close relationship between psychology and physiology is particularly well documented with regard to social relationships. Indeed, a large number of studies have shown that people who are more socially engaged are in overall <a href=\"http:\/\/eutils.ncbi.nlm.nih.gov\/entrez\/eutils\/elink.fcgi?dbfrom=pubmed&amp;id=3399889&amp;retmode=ref&amp;cmd=prlinks\" target=\"_blank\" rel=\"noopener noreferrer\">better health<\/a>&nbsp;and have a decreased risk of&nbsp;<a href=\"https:\/\/www.ncbi.nlm.nih.gov\/pubmed\/16594799\" target=\"_blank\" rel=\"noopener noreferrer\">depression<\/a>&nbsp;and a <a href=\"https:\/\/www.ncbi.nlm.nih.gov\/pmc\/articles\/PMC2424091\/\" target=\"_blank\" rel=\"noopener noreferrer\">reduced rate of cognitive decline<\/a>. Conversely, social isolation and solitude (see box below for the distinction between the two) increase the risk of premature death, an impact comparable to that of well-established risk factors such as obesity, physical inactivity, and even tobacco use. &nbsp;For example, the data collected during studies conducted among a total of 308,849 subjects indicated that those who have adequate social relationships have a 50% lower risk of premature mortality compared to those who have unsatisfying social relationships,&nbsp;<a href=\"http:\/\/journals.plos.org\/plosmedicine\/article?id=10.1371\/journal.pmed.1000316\" target=\"_blank\" rel=\"noopener noreferrer\">an impact comparable to smoking cessation<\/a>. These results are in line with the data collected during the <a href=\"https:\/\/www.ted.com\/talks\/robert_waldinger_what_makes_a_good_life_lessons_from_the_longest_study_on_happiness\" target=\"_blank\" rel=\"noopener noreferrer\">Harvard Study of Adult Development,&nbsp;<\/a>which has been studying the factors involved in healthy aging, from both the physical and psychological point of view, since 1939. The main conclusion of this study, which has been ongoing for 75 years, is simple: quality personal relationships, whether with family or friends, are one of the most important predictive factors of a person\u2019s happiness and good health throughout their life.<\/p>\n\n\n\n<p><strong>Social isolation and solitude: two distinct realities<br><\/strong>Social isolation refers to a lack of interpersonal relationships. It is an objective parameter that can be measured by examining whether a person lives alone, their conjugal status, the size of their social network, and their participation in group activities. Social isolation is a particularly frequent problem in elderly people, when a decrease in economic resources, invalidity, or the death of family and friends contribute to reducing social contacts. Studies show that socially isolated individuals are at greater risk of <a href=\"https:\/\/www.ncbi.nlm.nih.gov\/pmc\/articles\/PMC1115843\/\" target=\"_blank\" rel=\"noopener noreferrer\">heart disease<\/a>,&nbsp;<a href=\"http:\/\/jamanetwork.com\/journals\/jama\/article-abstract\/417085\" target=\"_blank\" rel=\"noopener noreferrer\">infectious diseases<\/a>&nbsp;(such as colds),&nbsp;<a href=\"http:\/\/annals.org\/aim\/article\/712853\/social-disengagement-incident-cognitive-decline-community-dwelling-elderly-persons\" target=\"_blank\" rel=\"noopener noreferrer\">cognitive decline<\/a>, and&nbsp;<a href=\"http:\/\/www.pnas.org\/content\/110\/15\/5797.full)\" target=\"_blank\" rel=\"noopener noreferrer\">premature mortality<\/a>. These increased risks are a result of the negative impact of social isolation on several physiological parameters, in particular an increase in <a href=\"https:\/\/www.ncbi.nlm.nih.gov\/pubmed\/21534675?dopt=Abstract\" target=\"_blank\" rel=\"noopener noreferrer\">blood pressure and fibrinogen levels<\/a>&nbsp;(higher risk of developing blood clots) as well as the activation of&nbsp;<a href=\"http:\/\/www.ajconline.org\/article\/S0002-9149(05)02221-6\/fulltext\" target=\"_blank\" rel=\"noopener noreferrer\">inflammatory processes<\/a>.<\/p>\n\n\n\n<p>As for solitude, it can be viewed as the psychological counterpart of social isolation, i.e., it is not only the number of contacts that come into play, but mainly dissatisfaction regarding the quality of the social relationships a person maintains (frequency, intimacy). Thus, a person can suffer from solitude even when surrounded by people, and, conversely, someone can feel not alone even if they live in an isolated way. Studies show that solitude is associated with a disruption of several physiological processes, including increased&nbsp;<a href=\"https:\/\/www.ncbi.nlm.nih.gov\/pmc\/articles\/PMC2841310\/\" target=\"_blank\" rel=\"noopener noreferrer\">blood pressure<\/a>,&nbsp;<a href=\"https:\/\/www.ncbi.nlm.nih.gov\/pmc\/articles\/PMC2841363\/\" target=\"_blank\" rel=\"noopener noreferrer\">cortisol levels in the blood<\/a> and <a href=\"http:\/\/link.springer.com\/article\/10.1007%2Fs10865-006-9056-5\" target=\"_blank\" rel=\"noopener noreferrer\">inflammatory processes<\/a>, as well as a higher risk of&nbsp;<a href=\"https:\/\/www.ncbi.nlm.nih.gov\/pmc\/articles\/PMC2851545\/pdf\/nihms182678.pdf\" target=\"_blank\" rel=\"noopener noreferrer\">heart disease<\/a>&nbsp;and <a href=\"http:\/\/www.sciencedirect.com\/science\/article\/pii\/S0277953610002674\" target=\"_blank\" rel=\"noopener noreferrer\">premature mortality<\/a>.<\/p>\n\n\n\n<p>One of the main health problems resulting from social isolation and solitude is the increased risk of heart disease. &nbsp;Epidemiological studies show that low social support is associated with&nbsp;<a href=\"http:\/\/circ.ahajournals.org\/content\/99\/16\/2192.long\" target=\"_blank\" rel=\"noopener noreferrer\">an approximately two-fold increase of the risk of cardiovascular events<\/a>&nbsp;and is a predictive factor for <a href=\"http:\/\/jamanetwork.com\/journals\/jamainternalmedicine\/fullarticle\/648187\" target=\"_blank\" rel=\"noopener noreferrer\">hypertension<\/a>,&nbsp;<a href=\"http:\/\/circ.ahajournals.org\/content\/99\/16\/2192.long\" target=\"_blank\" rel=\"noopener noreferrer\">coronary heart disease<\/a>&nbsp;and&nbsp;<a href=\"https:\/\/www.ncbi.nlm.nih.gov\/pmc\/articles\/PMC3380545\/\" target=\"_blank\" rel=\"noopener noreferrer\">heart failure<\/a>. In patients who have already suffered a myocardial infarction, studies show that low emotional and social support triples the risk of&nbsp;<a href=\"http:\/\/annals.org\/aim\/article\/706000\/emotional-support-survival-after-myocardial-infarction-prospective-population-based-study\" target=\"_blank\" rel=\"noopener noreferrer\">cardiovascular events<\/a>&nbsp;and <a href=\"http:\/\/jamanetwork.com\/journals\/jama\/article-abstract\/394716\" target=\"_blank\" rel=\"noopener noreferrer\">mortality<\/a>, impacts comparable to those of other well-documented risk factors such as hypercholesterolemia, type 2 diabetes, and tobacco use.<\/p>\n\n\n\n<p>Two main reasons explain this enormous influence of the social network on the risk of heart disease. First, social relationships can act as \u201c<a href=\"http:\/\/www.psy.cmu.edu\/~scohen\/Cohen%20&amp;%20Wills%201985%20Psy%20Bull.pdf\" target=\"_blank\" rel=\"noopener noreferrer\"><em>stress buffers<\/em><\/a>\u201d that alleviate the negative impacts associated with difficult times in life (disease, bereavement, divorce, etc.). An adequate social network can offer structural and emotional support to the people affected by these ordeals, helping them better deal with the shock, and thus reducing the harmful physiological consequences resulting from chronic stress, in particular on the risk of <a href=\"http:\/\/linkinghub.elsevier.com\/retrieve\/pii\/S0140673604170190\" target=\"_blank\" rel=\"noopener noreferrer\">heart disease<\/a>.&nbsp; Studies also show that individuals with a developed social network tend to be more physically active and adopt&nbsp;<a href=\"https:\/\/www.ncbi.nlm.nih.gov\/pubmed\/21534675\" target=\"_blank\" rel=\"noopener noreferrer\">better lifestyle habits<\/a>, which contributes to reducing the risk of heart disease and improving life expectancy. Socially active people are also more likely to receive better advice from their family and friends in the event of health problems and to quickly consult following an anomaly (chest pain, for example). Isolated people cannot count on this type of support due to the absence of someone they can trust in their circle, which contributes to&nbsp;<a href=\"http:\/\/jamanetwork.com\/journals\/jamainternalmedicine\/fullarticle\/1188041\" target=\"_blank\" rel=\"noopener noreferrer\">a higher rate of premature death<\/a>, in particular in those who present certain risk factors for heart disease.<\/p>\n\n\n\n<p>However, the impact of the social network is not only psychological: it is now clearly proven that isolation is perceived by the body as a form of \u201caggression\u201d and provokes the activation of physiological mechanisms involved in the stress response, such as the secretion of cortisol and adrenaline. For example, studies show that inadequate social relationships are associated with an increase in <a href=\"http:\/\/psycnet.apa.org\/psycinfo\/1995-05082-001\" target=\"_blank\" rel=\"noopener noreferrer\">adrenaline levels in urine<\/a>, a&nbsp;<a href=\"http:\/\/journals.lww.com\/psychosomaticmedicine\/Abstract\/1991\/01000\/Cardiovascular_effects_of_social_support_in_the.5.aspx\" target=\"_blank\" rel=\"noopener noreferrer\">higher resting heart rate <\/a>and an exaggerated increase in&nbsp;<a href=\"http:\/\/link.springer.com\/article\/10.1007\/s12160-009-9081-z\" target=\"_blank\" rel=\"noopener noreferrer\">blood pressure and heart rate<\/a>&nbsp;in response to stress, followed by a slower recovery. Socially isolated individuals are also more at risk of presenting lower <a href=\"http:\/\/citeseerx.ist.psu.edu\/viewdoc\/download?doi=10.1.1.506.4731&amp;rep=rep1&amp;type=pdf\" target=\"_blank\" rel=\"noopener noreferrer\">heart rate variability<\/a>&nbsp;(the interval between two heartbeats) and <a href=\"https:\/\/www.ncbi.nlm.nih.gov\/pmc\/articles\/PMC3064505\/\" target=\"_blank\" rel=\"noopener noreferrer\">left ventricular hypertrophy<\/a>, two risk factors of cardiovascular mortality. &nbsp;Over time, all these effects of chronic stress&nbsp;<a href=\"http:\/\/www.sciencedirect.com\/science\/article\/pii\/S2352250X15001104\" target=\"_blank\" rel=\"noopener noreferrer\">damage the heart and blood vessels <\/a>and would explain the marked increase in cardiovascular events observed in socially isolated people.<\/p>\n\n\n\n<p>Studies suggest that social isolation could also foster the development of atherosclerosis, the process responsible for the formation of plaque on the artery walls. Studies conducted in the 50s on animals at the Philadelphia zoo showed that isolation of birds and mammals was associated with <a href=\"http:\/\/circ.ahajournals.org\/content\/18\/1\/41.short\" target=\"_blank\" rel=\"noopener noreferrer\">a ten-fold increase of atherosclerotic lesions in these animals<\/a>. In humans, a study showed that some markers of a diminished social network (widowhood, celibacy) were associated with an&nbsp;<a href=\"https:\/\/www.ncbi.nlm.nih.gov\/pubmed\/15911895\" target=\"_blank\" rel=\"noopener noreferrer\">increase of the degree of coronary artery calcification<\/a>, a marker of atherosclerosis. It was also observed that low social support, combined with a tendency toward anger,&nbsp;<a href=\"http:\/\/www.sciencedirect.com\/science\/article\/pii\/S073510970000944X\" target=\"_blank\" rel=\"noopener noreferrer\">greatly accelerates the progression of atherosclerosis plaques<\/a>, which could contribute to a higher risk of cardiovascular events observed in <a href=\"http:\/\/circ.ahajournals.org\/content\/99\/16\/2192.long\" target=\"_blank\" rel=\"noopener noreferrer\">people exhibiting hostile behaviour.<\/a><\/p>\n\n\n\n<p>When we discuss the prevention of heart disease, what generally comes to mind is the importance of quitting smoking, adopting a healthy diet high in plant-based foods, exercising regularly, and maintaining a healthy body weight. These lifestyle changes are of course crucial, but the disastrous impact of inadequate social relationships on the risk of developing and dying from these diseases is a reminder that we cannot overlook the importance of psychosocial factors in any strategy intended to reduce their incidence. Especially since several current trends such as the aging of the population, high divorce rates, and the increasing number of people living alone (in Quebec,&nbsp;<a href=\"http:\/\/www12.statcan.gc.ca\/census-recensement\/2011\/as-sa\/98-312-x\/98-312-x2011003_2-fra.cfm\" target=\"_blank\" rel=\"noopener noreferrer\">1 out of 3 households<\/a>&nbsp;were one person in 2011) can exacerbate social isolation and the feeling of solitude. The impending mass retirement of baby-boomers is another factor to consider, since several new retirees see their health rapidly decline following their departure from the workplace. &nbsp;However,&nbsp;<a href=\"http:\/\/bmjopen.bmj.com\/lookup\/doi\/10.1136\/bmjopen-2015-010164\" target=\"_blank\" rel=\"noopener noreferrer\">studies<\/a>&nbsp;show that this risk can be considerably reduced by replacing the loss of work relationships by joining other groups (sports, cultural, political or other).&nbsp; Several people turn to social media, in particular Facebook, to maintain a network of contacts, and a <a href=\"http:\/\/www.pnas.org\/content\/113\/46\/12980.full\" target=\"_blank\" rel=\"noopener noreferrer\">recent study<\/a>&nbsp;suggests that this \u201cvirtual\u201d social life can provide the same benefits as a \u201creal\u201d social life in terms of reducing the risk of premature death. Whatever shape it takes, it is certain that a dynamic, diversified social network is a major asset to living longer in good health and should be a basic element of life hygiene.&nbsp; Indeed, in all the regions of the world recognized for the longevity of their inhabitants (Blue Zones), establishing a close-knit social fabric is part of the \u201csecret\u201d to a long life, on par with a healthy diet, regular physical activity, moderate alcohol consumption, and stress management.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Social isolation and loneliness increase the risk of dying prematurely, an impact comparable to that of well-established risk factors such as obesity, sedentary lifestyle and even smoking.<\/p>\n","protected":false},"author":3,"featured_media":12684,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[1578,1438],"tags":[],"coauthors":[],"class_list":["post-13672","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-cardiovascular-diseases","category-stress"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.1.1 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Social isolation: An important risk factor for premature death | Observatoire de la pr\u00e9vention de l&#039;Institut de Cardiologie de Montr\u00e9al<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" 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