Since the outbreak of the coronavirus disease in 2019 (COVID-19) and its global spread in 2020, many countries have implemented physical distancing policies to minimize transmission and control the pandemic. While the Korean and United States (US) governments did not enforce city lockdowns, they ordered mandatory closure of public, educational, worship, and welfare facilities [1]. As a result, the utilization of community-based health, education, cultural activity, and welfare services provided to adults over 65 years of age in Korea dropped to below 20% since the outbreak of the pandemic. Thus, COVID-19 has led to an increased prevalence of depressive mood, with an average score of 5.6/10, as estimated using the Korean version of the Geriatric Depression Scale (GDS-K) [2]. In the US, one in every three older adults suffered mental health consequences of lockdown periods; they have been reported to have experienced stress (36%) and loneliness (42.5%) as a result of social distancing [3]
Depressive moods are influenced by the living environment and social structure of an individual. In Korea, many older adults in rural areas live alone compared to their urban counterparts. Furthermore, older adults have a lower income, which contributes to the high prevalence of depressive mood [4]. Personal factors known to affect depression include income, education, socioeconomic status, and social capital. Physical condition, loneliness, and financial problems affect perceived happiness, which in turn influence depression [5]. In the US, typical personal factors that influence depression among older adults include income, education level, solitary living, race, and language [6].
Depression is not only linked to external situations and stimuli but is also associated with subjective factors such as self-rated health (SRH). Depression mediates the effects of SRH on life satisfaction in older adults [7] and decreases with increasing SRH [8]. SRH refers to the perception and rating of the health of an individuals. The World Health Organization (WHO) defines health as a construct encompassing physical, mental, and social health; therefore, SRH in older adults includes both mental and physical health. The major predictors of SRH in older adults are chronic diseases, physical and mental health status, and functional status [7]. Additionally, depression is influenced by social relationships and support, which may affect mental and social health. In particular, factors such as language barriers, racial discrimination, and poor healthcare access could intensify depressive moods among older adults in the US.
Social support refers to resources provided by others. Humans interact with others to satisfy their social needs and obtain social support through such interactions. Therefore, social support may be an important predictor of mental health [9]. Providers of social support include family, friends, and the community. In particular, it has been reported that people with a high perception of family and frequent contact with friends demonstrate low levels of depression [10].
The US is home to many Korean immigrants. Korean-Americans may suffer from high levels of depression due to communication problems caused by language barriers and other environmental factors [11]. Studies have confirmed a high prevalence of depression, mild cognitive impairment, and low utilization of mental health services among elderly Korean-Americans, emphasizing the need for further research on the barriers to mental healthcare utilization among them. Therefore, intervention studies are needed to prevent and manage depression in communities; the studies should be coupled with the development of various chronic disease management systems [12].
A previous study compared depressive moods among Korean older adults living in Canada (n = 128) and the US (n = 117). The study reported that Korean-Americans experienced a high level of depressive mood, which increased with increase in durations of living abroad, and health concerns [13]. In a similar study that compared the prevalence of depression among elderly immigrants in the US and older adults in Korea, the prevalence of depression was high in both groups. Furthermore, the prevalence of depression was higher among women than among men, but the lifespan of immigrants was not associated with depression [14].
The Korean and US governments have adopted different policies to prevent and control the spread of COVID-19, and the public cultures in the two countries differed based on how people responded to the policies. The Korean government enforced a mandatory 14-day quarantine system based on social distancing policies that hindered the engagement older adults in social activities. By contrast, the US government suspended a government-led social distancing campaign in April 2020 and allowed the public to choose their practices. As a result, older adults in the US likely had fewer restrictions on engaging in social activities. In Korea, strict social distancing policies were effective in controlling COVID-19; however, the incidence of social loneliness, depressive mood, and fear increased as an adverse consequence [15]. Therefore, this study aimed to investigate the depressive mood in older Korean and Korean-American adults caused by staying at home during the COVID-19 pandemic.
This study also examined the effects of the following depressive mood. First, we compared the differences in SRH and happiness between rural Korean and Korean-American older adults. Second, we compared the differences in social support, loneliness, depressive mood, and cognitive function scores between the two groups. Third, we examined the effects of stay-at-home orders and their associated factors in both the groups.