| 1st author, year | Sex | Sample, age | Marital status | Context/inpatients |
| 1) Cukrowicz et al. (2011) USA | 32 women 25 men (study 1) 78 women 27 men (study 2) | N = 162 N = 57 (study 1) N = 105 (study 2) Median 74.14 Median 70.89 | 62% married/living with a partner, 22% widowed, 16% divorced/separated/never married. | No information |
| 2) Dennis et al. (2005) UK | 56 women 44 men | N = 126 N = 76 N = 50 comparison group 65 years and over Median 76 | 71% 52% | No information |
| 3) Harrison et al. (2010) UK | No information | N = 87 N = 29 N = 58 comparison group 60 years and older | No information | Psychogeriatric clinic. Comparison group living in the community |
| 4) Heisel & Flett (2008) Canada | 71 women 36 men | N = 107 Mean age 81.4 years range Age 67 to 98 years | 77% unmarried | Psychogeriatric clinics. Nursing homes. General hospitals, retirement residences |
| 5) Jahn et al. (2011) USA | 78 women 28 men | N = 106 Age 60-93 Mean age 70.9 | 58.1% married 21.9% widowed, 11.4% divorced, 4.8% living with a partner, l.9% in a relationship, but not living together | Community and Family Medicine clinic |
| 6) McLaren et al. (2007) Australia | 221 women 130 men | N = 351 Mean age 71.31 years | 80% of the men were married and 69% lived in their own home with another person. 48% of the women were married, 42% were widowed, 43% lived in their own home with another person, 32% lived in a retirement village, and 20% lived alone | Retired Australians, living in the community |
| 7) Mellqvist et al. (2011) Sweden | 42 women 38 men | N = 80 Mean age 79.4 years Participation rate 77.4% | 51 of the sample lived without a partner. 15 were divorced, 35 were widowers or widows, 72 had children, 26 lived alone | Most of the interviews were conducted in a hospital, but 14 were held after discharge |
| 8) Rusing et al. (2012) USA | 168 women 80 men | N = 248 59 years or older Mean age 59 - 96 (70.0) | 57.7% were married, 42.3% were not married | Inpatient or outpatient psychiatry services at a Medical Centre or Clinic |
| 9) Rowe et al. (2006) USA | 342 women 180 men | N = 522 65 - 102 years | No information | Living at home |
| 10) Saias et al. (2012) France | 6213 women 5227 men | N = 11.140 64 years and over | 7262 married, 584 divorced/separated, 479 single, 3033 widowed |
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| 11) Szanto et al. (2012) UK | 56 women 34 men | N = 90 N = 24 depressed suicide attempters, N = 38 non-suicidal depressed elders, N = 28 no psychiatric history. Mean age 68.2 | 42% married in the suicide group (N = 24), 39% in the non-suicidal depressed group (N = 38), and 57% in the non-psychiatric control group, N = 28 | Inpatient psychogeriatric unit. Late life depression clinic. University and community primary care practices |
| 12) Vanderhorst & McLaren (2010) Australia | 87 women 23 men | N = 110 65 years and older. Mean age 75 years | 38% married, 53% widowed, 2% divorced and 7% single | Living in a retirement village, their own home or a nursing home |