PulseExploreJournal ClubDebatesTrendingResearchersJournals
Instagram
HomeExploreJournal ClubTrending
Synapse
⌘+K
Synapse
February 8, 2026Journal of Preventive Medicine and Public Health0 citationsOpen Access

Long Working Hours and Risk of Ischemic Heart Disease Among Japanese Workers: The Jichi Medical School Cohort Study

MSM. K. SaikiATAkizumi TsutsumiJLJian Li

Key Result

Long working hours independently increase the risk of ischemic heart disease among Japanese workers, even after adjusting for job strain.

Key Points

  • To investigate the impact of long working hours on ischemic heart disease risk among Japanese workers.
  • Cohort study design
  • Analysis of long working hours and ischemic heart disease incidence
  • Adjustment for job strain
  • Long working hours significantly increase the risk of ischemic heart disease
  • Effects observed in both male and female workers
  • Findings suggest a need for work hour management to prevent karoshi

Structured PICO

Do long working hours increase the risk of ischemic heart disease in Japanese workers?

P
Population
Japanese male and female workers
I
Intervention
Long working hours (LWH)
O
Outcome
Ischemic heart disease (IHD)hard clinical

Long working hours are an independent risk factor for ischemic heart disease in Japanese workers, highlighting the need for occupational working hour management.

Abstract

These findings suggest that LWH independently increases the risk of IHD among Japanese workers, even after adjustment for job strain, underscoring the importance of managing working hours to reduce karoshi in both male and female workers.

Ask AI
Helpful
Bookmark
Share
View Full Paper

Cite This Study

Saiki et al. (2026) studied this question. Long working hours independently increase the risk of ischemic heart disease among Japanese workers, even after adjusting for job strain.

synapsesocial.com/papers/698827f00fc35cd7a8847017https://doi.org/10.3961/jpmph.25.577
Ask AI
Helpful
Bookmark
Share
View Full Paper

Also Consider

Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context:

  1. 1Job Demands, Job Decision Latitude, and Mental Strain: Implications for Job Redesign1979 · 12,518 citations
  2. 2A Review of Mechanisms on the Beneficial Effect of Exercise on Atherosclerosis2020 · 12 citations
  3. 3Effects of stress on the development and progression of cardiovascular disease2017 · 1,219 citations
  4. 4Working hours as a risk factor for acute myocardial infarction in Japan: case-control study1998 · 316 citations
  5. 5The Jichi Medical School (JMS) Cohort Study: Design, Baseline Data and Standardized Mortality Ratios.2002 · 93 citations