"외로움과 고립은 뇌졸중이나 관상동맥 질환 발병 위험을 약 30% 증가시키는 것으로 나타났다. ... 사회적 고립이 건강에 미치는 해악은 하루에 담배 15개비를 피우는 것과 유사한 수준이며, 치매 발병 위험을 약 50% 높인다." "The mortality impact of being socially disconnected is similar to that caused by smoking up to 15 cigarettes a day, and even greater than that associated with obesity and physical inactivity. ... Loneliness and isolation are linked to around a 30 percent increased risk of having a stroke or developing coronary artery disease."