Working hours and cardiovascular disease in Korean workers: a case-control study.

Objectives: Long working hours can negatively impact a worker's health. The objective of this study was to examine the association between working hours and cardiovascular diseases (CVDs) and compare the degree of risk based on CVD subtypes in Korean workers.

Methods: This study was a case-control study of the patients registered in the Occupational Cardiovascular Diseases Surveillance 2010.

Relationship of early-life stress and resilience to military adjustment in a young adulthood population.

Purpose: Early-life stress (ELS) may mediate adjustment problems while resilience may protect individuals against adjustment problems during military service. We investigated the relationship of ELS and resilience with adjustment problem factor scores in the Korea Military Personality Test (KMPT) in candidates for the military service.

Methods: Four hundred and sixty-one candidates participated in this study.

Changes in the length of the medial patellofemoral ligament: an in vivo analysis using 3-dimensional computed tomography.

Background: The ideal points for medial patellofemoral ligament (MPFL) reconstruction have not been precisely defined.

Purpose: To determine at which flexion angles the grafts should be fixed to best restore patellar stability as well as to compare the length change of various femoral and patellar fixation sites for current MPFL reconstruction during knee flexion in vivo.

Study Design: Descriptive laboratory study.

Clinical and radiographic factors associated with distal radioulnar joint instability in distal radius fractures.

Background: Distal radioulnar joint (DRUJ) instability is an important cause of ulnar-sided wrist pain in distal radius fractures. However, instability is frequently undiagnosed and the clinical and radiographic factors associated with instability are not well understood.

Questions/purposes: We therefore identified clinical and radiographic factors associated with DRUJ instability in distal radius fractures.

The association between nonstandard work and occupational injury in Korea.

Background: The number of workers who died due to occupational injury in Korea as of 2007 was 1,383. The aim of this study was to identify whether there were any differences in the risk of occupational injury between nonstandard workers (temporary workers and/or subcontract workers) and regular workers.

Methods: 1,576 injured workers, selected from National Health Insurance and National Workers' Compensation Insurance, were interviewed via telephone survey using standardized questionnaires in 2007.

Weekend catch-up sleep is associated with decreased risk of being overweight among fifth-grade students with short sleep duration.

Previous studies have reported a relationship between short sleep duration and childhood overweight. Although school-aged children tend to compensate for weekday sleep deficit by increasing weekend sleep duration, the association between weekend catch-up sleep and childhood overweight remains unclear. This study aimed to examine the relationship between weekend catch-up sleep and being overweight in children.

Interictal pattern-induced visual discomfort and ictal photophobia in episodic migraineurs: an association of interictal and ictal photophobia.

Background: Pattern-induced visual discomfort and photophobia are frequently observed symptoms in migraineurs. The presumed pathophysiologic mechanisms of pattern glare and photophobia seem to overlap anatomically within the central nervous system.

Objective: To assess the relationship between interictal pattern-induced visual discomfort and ictal photophobia in episodic migraineurs.

Predictable factors for lymph node metastasis in early gastric cancer-analysis of single institutional experience.

Introduction: Prediction of lymph node metastasis in early gastric cancer (EGC) is very important to decide treatment strategies preoperatively. The aim of this study was to evaluate factors that predict the presence of lymph node metastasis and to identify the differences between mucosal and submucosal gastric cancers.

Methods: A total of 376 patients with EGC who underwent gastrectomy from March 1999 through December 2007 were retrospectively identified.

Current status of transurethral prostatectomy: a korean multicenter study.

Purpose: We aimed to verify the current status of transurethral resection of the prostate (TURP) in Korea.

Materials And Methods: The medical records of 1,341 men who underwent TURP in 9 Korean medical centers between 2004 and 2008 were reviewed. The patients were divided into two groups according to time periods: 2004-2005 (group 1) and 2006-2008 (group 2).

The association between impaired fasting glucose and noise-induced hearing loss.

Objectives: This study was performed to determine whether there is an association between impaired fasting glucose and noise-induced hearing loss.

Methods: The study subjects were workers in one automobile manufacturing company. The data were obtained from results of health examinations during 2005 and 2009.

Relationship between prostate-specific antigen and body mass index according to age: lower prostate-specific antigen in middle-aged overweight and obese Korean men.

Objective: To analyze the relationship between serum prostate-specific antigen (PSA) and body mass index (BMI) according to age in a population of ostensibly healthy Korean men.

Patients And Methods: Between 2002 and 2006, data from 13,025 men who visited health promotion centers were evaluated. All men underwent anthropometric measurements and serum PSA determination.

Hair nicotine levels in non-smoking pregnant women whose spouses smoke outside of the home.

Objective: To determine whether spouses who only smoke cigarettes outside the home can reduce the secondhand smoke (SHS) exposure of non-smoking pregnant women to the levels of those with non-smoking spouses.

Methods: In this cross-sectional survey performed between 1 October 2006 and 31 July 2007, 896 non-smoking pregnant women in their 35th gestational week were included. Hair nicotine levels and the smoking behaviour of their spouses at home were assessed.

Radio-frequency radiation exposure from AM radio transmitters and childhood leukemia and brain cancer.

Leukemia and brain cancer patients under age 15 years, along with controls with respiratory illnesses who were matched to cases on age, sex, and year of diagnosis (1993-1999), were selected from 14 South Korean hospitals using the South Korean Medical Insurance Data System. Diagnoses were confirmed through the South Korean National Cancer Registry. Residential addresses were obtained from medical records.

[Study on the relationship between childhood obesity and various determinants, including socioeconomic factors, in an urban area].

Objectives: This study was conducted to investigate the prevalence of childhood obesity, the association between the undesirable lifestyles and socioeconomic factors, the association between childhood obesity and various risk factors, including socioeconomic factors, and the agreement between the body mass index (BMI) classification and the body fat percentage.

Methods: The study subjects were all the 5th grade students from all the elementary schools in Gunpo City, Kyunggi Province, South Korea (4043 children at 22 schools). The subjects were measured for their height, weight and percent body fat etc.

[Public perceptions of the risk of Asian dust storms in Seoul and its metropolitan area].

Objectives: In spite of the recent increased concern for Asian dust storms, there are few studies concerning how dangerous the general public recognizes these dust storms to be. This study examined the public's perceptions of the risk of the Asian dust storms and also the source of the information concerning the risk.

Methods: A telephone interview survey using a standardized questionnaire was done for the adults living in Seoul and its metropolitan area from May 15th, 2003 to May 16th, 2003.

CYP2E1 and NQO1 genotypes, smoking and bladder cancer.

Background: Cytochrome P450 2E1 (CYP2E1) and NAD(P)H:quinone oxidoreductase (NQO1) catalyze the activation of some environmental procarcinogens present in tobacco smoke (i.e. nitrosoamines and heterocyclic amines).