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In South Korea, the first confirmed case of COVID-19 occurred on January 20 th, 2020. COVID-19 is a highly infectious respiratory disease that can be fatal, in particular to the elderly and people with pre-existing medical conditions. Overall, the results underscore the importance of implementing preventive measures for monitoring sleep problems during the pandemic, especially in the elderly.Įver since the novel COVID-19 first emerged, it spread rapidly, quickly becoming a pandemic. However, for age group 60 or above, RSV values of other sleep disorders and sleeping pills continued to increase, suggesting slower recovery of psychological impact with increasing age. In general, sudden increase in RSV after occurrence of COVID-19 followed by slow decline were observed. Insomnia and sleeping pill side effects showed decreasing trend at T3. In age group 60 or above, RSV continued to increase for other sleep disorders and sleeping pill. For all search terms, both age groups showed dramatic increase from T0 to T1. Main effects and interaction effects of age and time periods were significant for all search term groups. A 2x4 factorial Analysis of Variance was conducted to investigate main effects and interactions between age and time periods. Time points were divided into 4 periods, each 7 months long: 7 months before COVID-19 (T0), first confirmed COVID-19 case to 7 months after (T1), 7 to 14 months (T2), and 14 to 21 months (T3).

Search terms were grouped into 4 categories: insomnia, other sleep disorders, sleeping pills, and sleeping pill side effects.

RSV data was collected from the most commonly used search engine in South Korea, NAVER. Therefore, the aim of this study was to investigate the impact of COVID-19 pandemic on sleep problems among the general population using relative search volume (RSV) data, and whether there are any differences by age and time periods spanning before and during the pandemic. Literature indicates sleep problems among the general population have been reported to be as high as around 35.7% during the first 8 months of COVID-19. COVID-19 has had a substantial national impact in South Korea, causing negative psychological responses including sleep-related problems.

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