1222 Diagnosis of 1, 561 compensated cases for overwork-related cerebrovascular/cardiovascular diseases (ccvds) known as 'karoshi' in japan, 2010–2014. (24th April 2018)

• Record Type: Journal Article
• Authors: Yoshikawa, T; Sasaki, T; Matsumoto, S; Yamauchi, T; Kayashima, K; Kubo, T; Umezaki, S; Takahashi, M
• Is Part Of: Occupational and environmental medicine. Volume 75(2018)Supplement 2
• Page Start: A122
• Page End: A123
• Publication Date: 2018-04-24
• Subjects: Overwork-related cerebrovascular/cardiovascular diseases -- Karoshi -- Diagnosis-related; Medicine, Industrial -- Periodicals; Environmental health -- Periodicals; 616.980305
• DOI: 10.1136/oemed-2018-ICOHabstracts.347
• Languages: English
• ISSNs: 1351-0711

Abstract

Abstract : Introduction: Overwork-related health disorders including cerebrovascular/cardiovascular diseases (CCVDs) and mental disorders, known as ' Karoshi ', have been the keen occupational health issue. Main criteria applied for compensation of overwork-related CCVDs in Japan were (1) extraordinary events, (2) excessive working hours in 1 week and (3) long working hours over 100 extra hours in 1 month or over average 80 extra hours in 2–6 months. The present study examined diagnosis of compensated cases as overwork-related CCVDs in Japan. Methods: The investigation report for the occupational accident related to CCVDs prepared by 321 labour standards inspection offices all over Japan from January 2010 to March 2015 were collected to JNIOSH-RECORDS. Total 1561 cases which met these criteria were examined from the viewpoint of the diagnosis-related in focusing on sex, age, size of the industry. This study was supported by the research fund of MHLW (No. 150903–01). Results: The majority (96%) of all compensated CCVDs cases was male. Fatal cases accounted for 39.2%. A mean age at the onset of CCVDs was 49.3 years old. Intracerebral haemorrhage (ICH) was the highest (28.6%) in the proportion of diagnosis related group, following subarachnoid haemorrhage (SAH, 18.5%), cerebral infarction (CI, 14.6%), hypertensive encephalopathy (HE, 0.3%) in a cerebrovascular disease group. In a cardiovascular disease group, myocardial infarction (MI, 17.1%) was the highest, following cardiac arrest (including sudden cardiac death) (CA, 14.3%), dissecting aortic aneurysm (DAA, 5.2%), angina pectoris (AP, 1.2%). By classifying the industry size, CCVD cases at the workplace hiring less than 50 workers was over half of all cases (52.2%). Discussion: Focusing on cerebrovascular diseases accounting for 60% is useful for examining preventive measures. Characteristics of diagnosis contribute to discuss directions for preventing overwork-related CCVDs. It should be paid attention to preventive measures in small sized enterprises that occupational health services are difficult to reach.