Association between insomnia severity and presenteeism among Japanese daytime workers

Area of Science:

• Occupational Health
• Sleep Medicine
• Psychology

Background:

• Presenteeism, defined as reduced productivity due to health issues while at work, is a significant concern.
• While the link between presenteeism and general insomnia is known, the impact of insomnia severity remains under-explored.

Purpose of the Study:

• To investigate the association between varying levels of insomnia severity and presenteeism.
• To determine if increased insomnia severity correlates with a higher likelihood of presenteeism.

Main Methods:

• A study involving 1925 full-time employees with consistent work schedules was conducted.
• Insomnia severity was assessed using the Insomnia Severity Index (ISI) and Athens Insomnia Scale (AIS).
• Logistic regression analysis was employed to evaluate the relationship between insomnia severity and presenteeism.

Main Results:

• Moderate and severe insomnia, as per ISI, showed a stronger association with presenteeism than mild insomnia.
• Severe insomnia demonstrated a greater magnitude of association with presenteeism compared to moderate insomnia.
• While ISI indicated a clear dose-response relationship, the AIS classification showed less consistent results regarding increased odds of presenteeism with higher insomnia severity.

Conclusions:

• Increased insomnia severity is linked to a greater likelihood of presenteeism.
• Early identification and management of insomnia are vital for mitigating workplace productivity losses.
• This study uniquely examined presenteeism across distinct insomnia severity classifications (none, mild, moderate, severe).