Personality factors related to shift work tolerance in two- and three-shift workers

Among 1505 nurses, Morningness was significantly linked to lower insomnia levels.

• Morningness is negatively related to insomnia, suggesting that those who are more alert in the morning may experience less sleep disruption.
• The interaction between Morningness and shift type significantly influenced depressive symptoms, with three-shift workers showing lower depressive symptoms linked to higher Morningness.
• Flexibility is associated with increased depressive symptoms, indicating that adaptability to varied work schedules may have adverse emotional effects.
• The interaction between flexibility and shift type significantly affected insomnia, with three-shift workers experiencing less insomnia when more flexible.
• Languidity correlates with higher sleepiness, depressive, and anxiety symptoms, suggesting that increased tiredness due to sleep reduction may worsen mental health.
• Hardiness is linked to lower levels of insomnia, sleepiness, depression, and anxiety, indicating that resilience may buffer against these issues.

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