Table 2: Overview of Quantitative Studies Involving Interventions Targeting Social Isolation in Community-Dwelling Seniors^*.

Author, Year	Region, Country	Target Group	Sample Characteristics	Funding Source
1. Andersson 1985 (24)	Stockholm, Sweden	On wait lists for senior apartments	108 F Mean age 77 y	Delegation for Social Research & City of Stockholm
2. Arnetz and Theorell 1983 (29)	Stockholm, Sweden	Residents of senior apartments	60 (40 F + 20 M) Mean age 77.6 y	Delegation for Social Research & City of Stockholm
3. Hopman-Rock and Westoff 2002 (31)	Leiden, Netherlands	Physically inactive	390 (320 F + 70 M) Mean age 72.3 y	Merck Sharpe & Dohme, Ministry of Public Health, Welfare and Sports, Pfizer, Leerdammer Cheese, & health insurance companies (Zilveren Kruis Achmea & Groene Land Achmea)
4. McAuley et al. 2000 (32)	Illinois, United States	Physically inactive	174 (125 F + 49 M) Mean age 65.5 y	National Institute on Aging
5. Caserta and Lund 1993 (30)	Utah, United States	Bereaved	339 (239 F + 100 M) Mean age 67.2 y	National Institute on Aging
6. Rosen and Rosen 1982 (33)	Georgia, United States	Mental distress	117 (95 F + 22 M) Median age 70 y	Administration on Aging, Office Human Development
7. Morrow-Howell et al. 1998 (22)	St. Louis, Missouri, United States	Mental health crisis	61 (52 F + 9 M) Mean age 77 y	The Retirement Research Foundation
8. Heller et al. 1991 (23)	Indiana, United States	Low income & low social support	291 F Mean age 74 y	National Institute Mental Health
9. Tesch-Romer et al. 1997 (34)	Greifswald, Germany	Hearing impaired	148 (77 F + 71 M) Mean age 71 y	German Research Foundation
10. Brennan et al. 1995 (25)	Cleveland, Ohio, United States	Informal caregivers	102 (68 F + 34 M) Median age 64 y	National Institute on Aging
11. Winter and Gitlin 2007 (35)	Philadelphia, Pennsylvania, United States	Informal caregivers	103 F Mean age 66 y	Alzheimer’s Association

^*F indicates female; M, male; y; years.