Publications by authors named "Sungim Lee"

Atopic dermatitis (AD) is a common inflammatory skin disease in children worldwide but can affect individuals of all ages. Patients and parents of pediatric patients tend to restrict too much food because they think this aggravates or causes AD. However, there is a risk of nutrient deficiency owing to a lack of balanced diet.

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This work is motivated by the recent Korean Middle East respiratory syndrome outbreak. We propose an easy online estimation procedure for the case fatality rate, ie, the proportion of deaths among the total cases during the course of an epidemic disease, which is an important indicator of the severity of a disease. The key step in our procedure is representing the data with the run-off triangle, which simultaneously takes into account two time axes, namely, the calendar and disease-duration times.

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An intuitive and practical way to control chemical equivalence of secondary metabolites in herbal materials based on chromatographic fingerprints deserves a thorough discussion, yet it is relatively unexplored. For the first time, we propose a mixture of three similarity indices, the congruence coefficient, the average of the peak area ratios, and the larger value between the maximum peak area ratio and the reciprocal of the minimum peak area ratio, to make up for the weak points of some widely used similarity indices and to evaluate the chemical equivalence of two fingerprints from various perspectives. The three similarity values are fed into a three-dimensional kernel density estimation to determine the quality of herbal materials.

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Clustered occurrences of ankylosing spondylitis (AS) in family have been noticed. We evaluated patients with AS confirmed by the modified New York criteria for familial history of AS (one or more first to third degree relatives). The clinical characteristics and the recurrence risks (number of AS patients/number of familial members) of the familial AS compared to sporadic AS were investigated.

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Introduction: The aim of this study was to propose a method to classify dental arch forms of subjects with normal occlusion into several types that can ensure both goodness of fit and clinical application.

Methods: We selected 306 subjects with normal occlusion from 15,836 young adults, recorded 14 reference points that defined the distance between 2 arch forms as the area between 2 arches, and then classified the dental arch forms by using the partitioning around medoids clustering and silhouette method. We measured tooth size, arch width, basal arch width, arch depth, mesiodistal angulations, and buccolingual inclinations.

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The purpose of this study was to explore the intermaxillary tooth-size relationship that is attributed to normal occlusion using multivariate cluster analysis, while simultaneously incorporating the full dentition as a data set. From the central incisor to the second molar, the tooth sizes of 307 subjects (188 males and 119 females; mean age ± standard deviation, 19.9 ± 3.

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Introduction: Tooth-size studies are important in orthodontics. Our aim in this study was to establish normative data on tooth size with a clustering method.

Methods: Dental casts of 307 subjects with normal occlusion were examined.

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Although the prevalence of chronic obstructive pulmonary disease (COPD) and its relationship with respiratory symptoms are well documented, few studies have focused on individuals with normal lung function, particularly in developed regions of Asia. The purpose of this report is to examine the relationship between respiratory symptoms and FEV1 in a population-based sample of Korean men and women with normal lung function. Subjects comprised 7518 individuals aged 40-69 years without airflow obstruction based on spirometric testing and in the absence of a medical history of pulmonary disease.

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Background: The prevalence of undiagnosed airflow obstruction is difficult to measure since it requires screening in population-based samples to identify individuals free of clinical symptoms. The purpose of this report is to examine the prevalence of undiagnosed airflow obstruction and its relation with respiratory symptoms in middle-age adults in the Korean Health and Genome (KHG) Study.

Methods: The KHG study is an ongoing population-based study of Korean adults aged 40 to 69 years.

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