Jae Sung Choi

The findings of this review of reviews suggest that some personal and environmental factors were related with participation in physical activity. However, an association of various factors with physical activity could not be established because of the lack of primary studies to build up the organized evidence. More studies with a prospective design should be conducted to understand the potential causes for physical activity.

BACKGROUND AND OBJECTIVE: One of the clinical manifestations of refractory asthma (RA) in a certain group of patients is persistent airway obstruction (PAO), despite treatment with high doses of inhaled and/or systemic corticosteroids. Airway neutrophilic inflammation is frequently observed in RA; however, the relationship between neutrophilic inflammation and PAO has not been evaluated in this group of patients. The aim of this study was to compare the clinical parameters and patterns of inflam

Using two nationally representative datasets, this paper examines how the imposition of a curfew on private cram schools affects the consumption of private tutoring services as well as the time use patterns of Korean high school students. To identify the impact of the curfew, this study capitalizes on inter-city/province variation in private cram school regulatory ordinances and estimates a difference-in-differences estimator between the years of 2009 and 2012. The findings indicate that the cur

OBJECTIVES: This study evaluated whether individuals with affected family member adhered to healthy behaviours. DESIGN AND SETTING: This was a cross-sectional study of participants selected from health examinees who underwent the national health check-up programme of Korea in 39 centres between 2004 and 2013. PARTICIPANTS: The baseline data of 128 520 participants enrolled in the Health Examinees-Gem study were used for analysis. MAIN OUTCOMES AND MEASURES: Associations of family history of diab

BACKGROUND/AIMS: Cyclophosphamide (CP) is a promising treatment for severe cases of paraquat (PQ) poisoning. We investigated the effective dose of CP for mitigating PQ-induced lung injury. METHODS: Adult male Sprague-Dawley rats were allocated into five groups: control, PQ (35 mg/kg, intraperitoneal injection), and PQ + CP (1.5, 15, or 30 mg/kg). The dimensions of lung lesions were determined using X-ray microtomography (micro-CT), and histological changes and cytokine levels were recorded. RESU

Sex-specific trends in alcohol consumption were influenced by demographic, behavioral, and perceived health-related factors. The findings will help improve the understanding of alcohol-related problems and provide evidence for establishing country-specific policies and campaigns in Korea.

We investigated the role of common genetic variation in immune-related genes on breast cancer disease-free survival (DFS) in Korean women. 107 breast cancer patients of the Seoul Breast Cancer Study (SEBCS) were selected for this study. A total of 2,432 tag single nucleotide polymorphisms (SNPs) in 283 immune-related genes were genotyped with the GoldenGate Oligonucleotide pool assay (OPA). A multivariate Cox-proportional hazard model and polygenic risk score model were used to estimate the effe

BACKGROUND: Although many studies have focused on leisure time physical activity (LTPA), household physical activity (HPA) can contribute to health benefits. This study aimed to compare LTPA and HPA patterns and to examine the association of these types of activities with the risk of mortality in Korea. METHODS: A total of 125,299 participants 40 to 69 years old and enrolled in the Health Examinees (HEXA) study from 2004 to 2012 were included in this study. The sex-specific LTPA and HPA categori

To evaluate the associations of periodontal disease (PD) with systemic diseases, including diabetes mellitus (DM) and cardiovascular disease (CVD), as well as the reciprocal association. The CVD included the cases of coronary heart disease and heart failure. A prospective study was conducted from 2007 to 2019 using linked data from three databases in Korea. Three separate study groups were formed to individually determine the risks of PD (n = 10,533), DM (n = 14,523) and CVD (n = 14,315). All di

The unemployment rate among youths (age 20–29) in South Korea has increased sharply from 6.6 percent in 2002 to 9.8 percent in 2016. At the same time, the college entrance rate remains around 70 percent, and skill mismatch among college goers is a critical policy concern. Little attention has been paid to temporal change in labor market outcomes among college graduates or to the kinds of graduates who are particularly vulnerable to labor market uncertainty. We investigate how labor market experi

As the divorce rate in South Korea increases, an increasing proportion of children are growing up in single-parent families. Given the limited public support and disadvantages for women in the labor market, it is expected that single parents in Korea, single mothers in particular, are more likely to use family ties to mitigate economic and social difficulties, including the option to live with their parents. We assessed the living arrangements of single parents and their children with respect to

We test the effect of school choice on studentsʼ academic performance by exploiting the change in high school assignment program in Seoul, Korea from within-district randomization to open enrollment. Employing difference-in-differences methodology on administrative data of high school studentsʼ National Assessment of Educational Achievement test scores, we find no evidence that enhanced school choice improved average test scores in Seoul. However, we find differential effects across school types

BACKGROUND: Physical activity (PA) is recommended to improve the survival of cancer patients. However, the prognostic impact of specific PAs is not well understood. Therefore, we investigated the associations of the duration, type, intensity, and number of PAs one participates in pre- and post-diagnosis with mortality in Korean patients with cancer. METHODS: Among the participants aged 40-69 years recruited from the Health Examines study, those diagnosed with cancer after baseline (n = 7749) and