Consequences of shiftworking on sleep duration, sleepiness, and sleep attacks

Area of Science:

• Occupational Health
• Sleep Medicine
• Public Health

Background:

• Rotating and permanent night work are recognized disruptors of natural sleep patterns.
• Previous research indicates potential links between non-standard work schedules and adverse health outcomes.
• Understanding the specific impacts on sleep duration, sleepiness, and accident risk is crucial for worker safety.

Purpose of the Study:

• To investigate the effects of different work schedules on sleep duration, excessive sleepiness, and sleep attacks.
• To examine the association between work schedules and the incidence of driving and occupational accidents.
• To quantify the risks associated with fixed night and shift work compared to daytime work.

Main Methods:

• A telephone survey was conducted with a representative sample of 3,345 adults in New York State.
• Data collected included work schedules, sleep patterns, excessive sleepiness, sleep attacks, and accident history.
• Multivariate models were used to calculate adjusted odds ratios (OR) for various work arrangements.

Main Results:

• Forty percent of workers reported sleeping less than 6.5 hours per main sleep episode.
• Short sleep duration (<6 hours) was associated with fixed night (OR: 1.7) and day-evening-night shifts (OR: 1.9).
• Fixed night work showed the highest association with excessive sleepiness (OR: 3.3), sleep attacks (OR: 3.2), and driving accidents (OR: 3.9).

Conclusions:

• Working outside regular daytime hours is strongly linked to reduced sleep duration and increased sleepiness.
• Fixed night work arrangements pose the most significant risks, contributing to insufficient sleep and heightened accident potential.
• Interventions targeting night and shift workers are needed to mitigate sleep-related health and safety risks.