Hyunkyu Kim

This study identified a consistent relationship between sleep quality and anxiety in Korean adolescents regardless of sleep duration.

Exercise has been considered as treatment and a preventive modality to alleviate depressive symptoms, but sex differences regarding specific types of exercise in association with depression have not been clearly elucidated. Here, we investigated sex differences in the association between exercise type and depression in Korean adults. Data from the Korea National Health and Nutrition Examination Survey (KNHANES) were used for this study. A total of 13,914 participants who had filled in a Patient

This study identified the relationship between handgrip strength change and cognitive function among South Korean adults. According to our large, longitudinal sample, decreasing handgrip strength was associated with decline in cognitive function.

PCR-based clonality study of thyroid nodules may help to distinguish hyperplastic from neoplastic nodules.

In social media, the phenomenon of travel envy is not uncommon. One of the most popular themes on social media, the travel experience frequently becomes the subject of social comparison and envy among users. Envy generally has been considered a negative emotion, inducing depression in the envier. However, a recent stream of research increasingly highlights the positive side of envy, based on the notion that envy has two types: benign and malicious. This study aims to incorporate the dual envy co

Multiple treatment modalities, including topical and systemic corticosteroid and phototherapy, have been used in treatment of patients with atopic dermatitis. However, long-term corticosteroid therapy may have various adverse effects. The purpose of this study was to investigate the therapeutic efficacy and safety of bath therapy using green tea extracts for treatment of patients with atopic dermatitis. A total of four patients with atopic dermatitis were enrolled in this study. A Malassezia mul

In this cohort study, we assessed the association between depression and the risk of Alzheimer's disease from data obtained from the 2002 to 2013 Korean National Health Insurance Service-Elderly Cohort Database, which accounts for 10% of the South Korean population aged > 60 years. A total 518,466 patients were included in the analysis and followed up, unless they were excluded due to death or migration. Patients who sought treatment for depression or dementia within 1 year of the washout period

<b>Background:</b> Patients with schizophrenia have impairments in social functioning and are readmitted to healthcare institutions frequently. Individuals at ultra-high risk (UHR) for psychosis already present poor social functioning; among those individuals, the conversion rate from the putative prodromal phase to overt psychosis is 20%-30% within 1-2 years. Here, we analyzed the factor structure of self-related variables and neuro- and socio-cognitive function, and investigated whether these

High caffeine consumption increases anxiety in South Korean adolescents. This association proved consistent regardless of sex or other socioeconomic factors.

Adolescent depression and suicide have become leading public health and socioeconomic problems. Determining the connection between adolescent behavior and depression can inform strategies to reduce the prevalence of depression and suicide. We investigated the association between sexual behavior and depression in South Korean adolescents. Data for this cross-sectional study were obtained from the 2017-2019 Korea Youth Risk Behavior Web-Based Survey. Data of 178,664 subjects were analyzed using ch

Depression in older adults is a global socioeconomic burden. Identifying factors, such as physical activity or exercise that can help prevent depression is important. We aimed to investigate the relationship between changes in handgrip strength and the presence of depression using longitudinal, nationwide data of older Korean adults. Data from the Korean Longitudinal Study of Aging were used in this study. A total of 6783 participants who had undergone a handgrip strength test and completed the

This study identified the association between social phobia and the risk of arrhythmia in a South Korean representative cohort. These results suggest that social phobia should be treated properly to reduce arrhythmia risks.

Dear Editor: A 64-year-old man presented to our department of hospital with a one-month history of skin lesion on the scalp. Physical examination revealed a skin-colored nodule on the left temporal scalp (Fig. 1A) and a skin-colored verrucous surfaced plaque on the right temporal area (Fig. 1B). The lesions gradually increased in size. The patient had no previous history of skin disease or recurrent infection. Further history-taking and clinical examination did not reveal any risk factors or