TABLE 2.
Excluded studies with reason for exclusion.
| Excluded studies | |
| References | Reason for exclusion |
| Beller, J., and Wagner, A. (2018). Disentangling loneliness: differential effects of subjective loneliness, network quality, network size, and living alone on physical, mental, and cognitive health. Journal of aging and health, 30 (4), 521–539. https://doi.org/10.1177/0898264316685843 | <50 and variables not relevant |
| Donovan, N. J., Qiong, W., Rentz, D. M., Sperling, R. A., Marshall, G. A., Glymour, M. M. (2017). Loneliness, depression and cognitive function in older U.S. adults. International Journal of Geriatric Psychiatry, 32 (5), 564–573. https://doi.org/10.1002/gps.4495 | Inappropriate sample |
| Evans, I., Llewellyn, D. J., Matthews, F. E., Woods, R. T., Brayne, C., Clare, L., and CFAS-Wales research team (2019). Living alone and cognitive function in later life. Archives of Gerontology and Geriatrics, 81, 222–233. https://doi.org/10.1016/j.archger.2018.12.014 | Variables not relevant (some cognitive impairment) |
| Fung, A., Lee, A., Cheng, S. T., and Lam, L. (2019). Loneliness interacts with family relationship in relation to cognitive function in Chinese older adults. International psychogeriatrics, 31 (4), 467–475. https://doi.org/10.1017/S1041610218001333 | Cross-sectional |
| Jang, Y., Choi, E. Y., Park N. S., Chiriboga, D. A., Duan, L. and Kim, M. T. (2021). Cognitive health risks posed by social isolation and loneliness in older Korean Americans. BMC Geriatrics, 21, 123. https://doi.org/10.1186/s12877-021-02066-4 | Cross-sectional |
| Lam, C. L. M., Junhong, Y. and Lee, T. M. C. (2017). Perceived loneliness and general cognitive status in community-dwelling older adults: the moderating influence of depression. Aging, Neuropsychology, and Cognition 24 (5), 471–480. https://doi.org/10.1080/13825585.2016.1226246 | Cross-sectional |
| McHugh Power, J. E., Kenny, R. A., Lawlor, B. A., Steptoe, A., and Kee, F. (2017). The discrepancy between social isolation and loneliness as a clinically meaningful metric: findings from the Irish and English longitudinal studies of ageing (TILDA and ELSA). International journal of geriatric psychiatry, 32 (6), 664–674. https://doi.org/10.1002/gps.4509 | Cross-sectional and variables not relevant |
| McHugh Power, J. E., Sjöberg, L., Kee, F., Kenny, R. A., and Lawlor, B. (2019b). Comparisons of the discrepancy between loneliness and social isolation across Ireland and Sweden: findings from TILDA and SNAC-K. Social psychiatry and psychiatric epidemiology, 54 (9), 1079–1088. https://doi.org/10.1007/s00127-019-01679-w | Cross-sectional and variables not relevant |
| Oremus, M., Tyas, S. L., Maxwell, C. J., Konnert, C., O’Connell, M. E., and Law, J. (2020). Social support availability is positively associated with memory in persons aged 45–85 years: A cross-sectional analysis of the Canadian Longitudinal Study on Aging. Archives of Gerontology and Geriatrics, 86, 103962. https://doi.org/10.1016/j.archger.2019.103962 | Cross-sectional |
| Sin, E., Shao, R., and Lee, T. (2021). The executive control correlate of loneliness in healthy older people. Aging and Mental Health, 25 (7), 1224–1231. https://doi.org/10.1080/13607863.2020.1749832 | Cross-sectional |
| Yang, R., Wang, H., Edelman, L. S., Tracy, E. L., Demiris, G., Sward, K. A., and Donaldson, G. W. (2020). Loneliness as a mediator of the impact of social isolation on cognitive functioning of Chinese older adults. Age and ageing, 49 (4), 599–604. https://doi.org/10.1093/ageing/afaa020 | Cross-sectional |