Systematic review of factors influencing loneliness in older-adult migrants.

Objectives: Older-adult migrants constitute a proportion of the global population, and loneliness hinders their adaptation to host areas. However, review studies on risk factors for loneliness target general older-adults without focusing on older-adult migrants. Therefore, this study systematically reviews and synthesizes the factors influencing the loneliness of older-adult migrants.

Method: Five databases were searched and screened for quantitative studies investigating the relationship between risk factors and loneliness among older-adult migrants (over age 50). Finally, 35 articles were included.

Results: Factors related to loneliness in older-adult migrants were synthesized into sociodemographic, physical health, psychological, interpersonal, and acculturation-related factors. Consistent significant relationships with loneliness were found for a few risk factors, including not having spouses, low subjective financial status, poor self-rated health, poor psychological status, few non-kin ties, low quality of kin and non-kin ties, and a weak sense of belonging to either one's ethnic group or that of the host areas.

Conclusion: This review discusses the unique findings on the risk factors for loneliness in older-adult migrants. Additionally, the current literature on loneliness in older-adult migrants has some research gaps, calling for longitudinal studies with a rigorous design.