Loneliness: across the Domains c/o BMJ

individual

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INTERPERSONAL : SCIENCES

humanistic -------------------------------------------  mechanistic

SOCIOLOGY : POLITICAL

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group-population

isolation loneliness mental health feelings  identity  meaning motivation - behaviour SUBJECTIVITY	physical health, coronary heart disease , stroke mortality longitudinal observational studies meta-analysis systematic review OBJECTIVITY
social network  family - relationships - befriending social isolation quality of life family - community cohesion social enterprise SOCIO-	policy social care provision day centers mobility - transport volunteering public - funding - private economic

Valtorta, N.K., Kanaan, M., Gilbody, S., et al. (2016). Loneliness and social isolation as risk factors for coronary heart disease and stroke: systematic review and meta-analysis of longitudinal observational studies. Heart. Published Online First: [April 18, 2016]. doi:10.1136/heartjnl-2015-308790

My original source:
Smyth, C. Warning: loneliness as bad for your health as tobacco & Scourge of Loneliness. The Times, 20 April 2016, p.4 and 20.