The menstrual cycle associated with insomnia in newly employed nurses performing shift work: a 12-month follow-up study.

Purpose: This study aimed to investigate whether insomnia among newly-employed shift-working nurses is associated with menstrual cycle irregularity.

Methods: We followed 287 nurses employed between 2015 and 2016 for 12 months. An Insomnia Severity Index (ISI) was completed to determine levels of insomnia 6 months after beginning work.

Surgery for hemoptysis in patients with benign lung disease.

Background: Hemoptysis can be a life-threatening condition that requires urgent treatment. Surgery still plays an important role in managing this critical situation, although previous reports have reported high postoperative morbidity and mortality rates. We report our experience with surgical resection for hemoptysis caused by benign lung diseases.

Insomnia and hearing impairment among occupational noise exposed male workers.

Background: The aim of this study was to investigate the association between insomnia and hearing impairment among workers exposed to occupational noise.

Methods: This study included 809 male workers exposed to occupational noise. The participants underwent audiometric testing, and their insomnia was examined based on the Insomnia Severity Index test.

Comparison of anxiety and depression status between office and manufacturing job employees in a large manufacturing company: a cross sectional study.

Background: The aim of this study was to investigate whether type of work is associated with anxiety and depression using the Hospital Anxiety and Depression Scale (HADS). Additionally, we investigated the impact of number of working hours on anxiety and depression.

Methods: A total of 1774 workers participated and completed the HADS to determine their levels of anxiety and depression.

Coronary artery atherosclerosis associated with shift work in chemical plant workers by using coronary CT angiography.

Objectives: The aim of this study was to investigate whether shift work is related to elevated risk of coronary artery disease (CAD) by determining the coronary artery calcium (CAC) score and the presence of coronary artery stenosis by using coronary artery CT angiography (CCTA).

Methods: In this study, 110 male workers participated and underwent a CCTA examination for CAC scoring, which represents coronary artery plaque, and were evaluated for luminal stenosis. All of the participants were working in the same chemical plant, of whom 70 worked day shifts and 40 worked rotating shifts.

Respiratory Syncytial Virus Outbreak in the Basic Military Training Camp of the Republic of Korea Air Force.

Objectives: An outbreak of acute febrile illness occurred in the Republic of Korea Air Force boot camp from May to July 2011. An epidemiological investigation of the causative agent, which was of a highly infective nature, was conducted.

Methods: Throat swabs were carried out and a multiplex reverse transcriptase-polymerase chain reaction (RT-PCR) assay was performed to identify possible causative factors.

Serum prostate-specific antigen levels and type of work in tire manufacturing workers.

Objectives: This study measures serum prostate-specific antigen (PSA) levels in tire-manufacturing workers, and attempts to find occupational or non-occupational factors that related to their PSA levels.

Methods: A total of 1,958 healthy male workers (1,699 were production workers and 259 were office workers) took PSA measurement for analysis.

Results: After adjusting for age, body mass index, hypertension, regular exercise, alcohol drinking and smoking, which were significantly related to serum PSA levels or known related factors of serum PSA levels, the geometric mean PSA levels were significantly high in the office workers (p = 0.

Two cases of methemoglobinemia induced by the exposure to nitrobenzene and aniline.

Objective: To report two cases of methemoglobinemia induced by inhaled nitrobenzene and dermally absorbed aniline.

Methods: We have evaluated a 37-year-old male worker exposed to nitrobenzene by inhalation while conducting maintenance job of mononitrobenzene pump and a 25-year-old male worker exposed dermally to aniline while unloading.

Results: The first case is a 37-year-old male exposed to nitrobenzene.