Shift Work, Night Shifts & Nurses’ Cold Risk
- On March 10, 2025, a study published in Chronobiology International revealed a significant correlation between shift work, particularly night work, and a heightened risk of infections among nurses.
- The research, conducted with 1,335 Norwegian nurses, examined the associations between sleep duration, sleep debt, shift work characteristics, and self-reported infections.
- Specifically, the study found that sleep debt was "dose-dependently associated with an increased risk for the common cold (adjusted odds ratio [aOR], 1.33; 95 percent confidence interval...
Shift Work Linked to Increased Infection Risk in Nurses
Table of Contents
- Shift Work Linked to Increased Infection Risk in Nurses
- Shift Work and Infection risk in Nurses: A Q&A Guide
- Introduction
- Q&A: Understanding Shift Work and Infection Risk
- What is sleep debt, and how does it affect nurses working shifts?
- How does shift work, particularly night shifts, increase the risk of infection in nurses?
- What specific infections are nurses more susceptible to due to shift work and sleep debt?
- How importent is the increased risk of infection for nurses with sleep debt?
- What can nurses do to mitigate the increased risk of infection associated with shift work?
- What workplace strategies can healthcare employers implement to support nurses’ health and reduce infection risk?
- Does sleep duration alone impact infection risk, or is it the sleep debt that is more critical?
- How was the study conducted?
- Are there any limitations to the study?
- Summary of Infection Risks and Sleep Debt
- Conclusion
- Further Reading
Published: March 10, 2025
The Impact of Shift Work on Nurses’ Health
On March 10, 2025, a study published in Chronobiology International revealed a significant correlation between shift work, particularly night work, and a heightened risk of infections among nurses. The study highlights the vulnerability of nurses to the common cold and other infectious diseases due to disrupted sleep patterns.
Study Details: Sleep Debt and Infection Risk
The research, conducted with 1,335 Norwegian nurses, examined the associations between sleep duration, sleep debt, shift work characteristics, and self-reported infections. The findings indicate a clear link between sleep debt and an increased susceptibility to various infections.
Key Findings:
- Common Cold: Increased risk associated with both sleep debt and night work.
- Pneumonia/Bronchitis: Higher risk observed with increased sleep debt.
- Sinusitis: Elevated risk correlated with sleep debt.
- Gastrointestinal Infection: Increased risk associated with sleep debt.
Specifically, the study found that sleep debt was ”dose-dependently associated with an increased risk for the common cold (adjusted odds ratio [aOR], 1.33; 95 percent confidence interval [CI], 1.00 to 1.78; aOR, 2.32; 95 percent CI, 1.30 to 4.13), pneumonia/bronchitis (aOR, 2.29; 95 percent CI, 1.07 to 4.90; aOR, 3.88; 95 percent CI, 1.44 to 10.47), sinusitis (aOR, 2.08; 95 percent CI, 1.22 to 3.54; aOR, 2.58; 95 percent CI,1.19 to 5.59), and gastrointestinal infection (aOR, 1.45; 95 percent CI, 1.00 to 2.11; aOR, 2.45; 95 percent CI, 1.39 to 4.31) compared with no sleep debt.”
Similarly, night work and the number of night shifts (one to 20 versus zero nights) were associated with an increased risk for the common cold. However, the study noted that infections were not associated with sleep duration alone.
Recommendations for Reducing Infection Risk
The study suggests strategies for mitigating the risks associated with shift work. The researchers emphasize the importance of consistent sleep schedules and workplace adjustments to support nurses’ health.
The authors suggest that “to help reduce sleep debt and perhaps lower infection risk in the future, nurses could benefit from maintaining consistent sleep schedules, while workplace strategies might include optimizing forward-rotating shifts, limiting consecutive night shifts, have days off after last night shift, and promoting the benefits of sleep.”
Further Research and Resources
For more detailed information, refer to the full study published in Chronobiology International.
Shift Work and Infection risk in Nurses: A Q&A Guide
Introduction
A recent study published in chronobiology International on March 10, 2025, sheds light on the correlation between shift work, sleep debt, and infection risk among nurses. This Q&A guide provides a extensive overview of the study’s findings, implications, and actionable recommendations for nurses and healthcare employers.
Q&A: Understanding Shift Work and Infection Risk
What is sleep debt, and how does it affect nurses working shifts?
Sleep debt refers to the cumulative affect of not getting enough sleep. For nurses working shifts, particularly night shifts, maintaining a consistent sleep schedule can be challenging, leading to chronic sleep deprivation. This study defines sleep debt as the difference between the amount of sleep needed and the amount actually obtained. The study revealed that nurses with even moderate sleep debt (1-120 minutes less sleep than needed) faced a significantly higher risk of common infections ([1],[2]). Severe sleep debt further exacerbated this risk.
How does shift work, particularly night shifts, increase the risk of infection in nurses?
Shift work, especially night shifts, disrupts the body’s natural circadian rhythm, impacting various physiological processes, including the immune system. The study found a link between night work and a higher risk of the common cold ([3]).
What specific infections are nurses more susceptible to due to shift work and sleep debt?
The study identified several infections with increased risk associated with sleep debt and/or night work:
Common Cold: Increased risk associated with both sleep debt and night work.
Pneumonia/Bronchitis: Higher risk observed with increased sleep debt.
Sinusitis: Elevated risk correlated with sleep debt.
Gastrointestinal Infection: Increased risk associated with sleep debt.
How importent is the increased risk of infection for nurses with sleep debt?
The study quantified the increased risk using adjusted odds ratios (aOR). Specifically, it found that sleep debt was dose-dependently associated with an increased risk.Key findings include:
Common Cold: aOR of 1.33 (95% CI, 1.00 to 1.78) for moderate sleep debt and 2.32 (95% CI, 1.30 to 4.13) for severe sleep debt.
Pneumonia/bronchitis: aOR of 2.29 (95% CI, 1.07 to 4.90) for moderate sleep debt and 3.88 (95% CI, 1.44 to 10.47) for severe sleep debt.
Sinusitis: aOR of 2.08 (95% CI, 1.22 to 3.54) for moderate sleep debt and 2.58 (95% CI,1.19 to 5.59) for severe sleep debt.
Gastrointestinal Infection: aOR of 1.45 (95% CI, 1.00 to 2.11) for moderate sleep debt and 2.45 (95% CI, 1.39 to 4.31) for severe sleep debt.
What can nurses do to mitigate the increased risk of infection associated with shift work?
The study suggests several strategies for nurses to reduce their risk of infection:
Maintain Consistent Sleep Schedules: Even on days off, try to stick to a regular sleep-wake cycle to regulate the circadian rhythm.
Prioritize Sleep: Aim to get the recommended amount of sleep each night (typically 7-9 hours for adults).
Practice Good Sleep Hygiene: Create a relaxing bedtime routine, ensure a dark and quiet sleep surroundings, and avoid caffeine or alcohol before bed.
What workplace strategies can healthcare employers implement to support nurses’ health and reduce infection risk?
Healthcare employers can play a crucial role in mitigating the risks associated with shift work:
Optimize forward-Rotating Shifts: These shifts are generally easier to adapt to than backward-rotating shifts.
Limit Consecutive Night Shifts: Reduce the number of consecutive night shifts to minimize disruption to the circadian rhythm.
Provide Days Off After Night Shifts: Ensure nurses have adequate recovery time with days off after completing a series of night shifts.
Promote the Benefits of Sleep: Educate nurses about the importance of sleep for their health and well-being.
Does sleep duration alone impact infection risk, or is it the sleep debt that is more critical?
The study indicated that while night work and sleep debt were associated with an increased risk of infections, sleep duration alone was not associated with infection risk.
How was the study conducted?
The study involved 1,335 Norwegian nurses with an average age of 41.9 years,and 90.4% were women.Data were derived from the spring 2018 Survey of shift work, Sleep and Health study ([2],[3]). The research examined associations between sleep duration, sleep debt, shift work characteristics, and self-reported infections.
Are there any limitations to the study?
The study relied on self-reported data for infections, which can be subjective and may not always be accurate. Additionally, the sample consisted primarily of female nurses from Norway.
Summary of Infection Risks and Sleep Debt
| infection | Increased Risk with Moderate Sleep Debt | Increased Risk with Severe Sleep Debt | Associated with Night Work |
| ———————- | ————————————— | ————————————- | ————————– |
| Common Cold | Yes (aOR 1.33) | Yes (aOR 2.32) | Yes |
| Pneumonia/Bronchitis | Yes (aOR 2.29) | Yes (aOR 3.88) | No |
| Sinusitis | Yes (aOR 2.08) | yes (aOR 2.58) | No |
| Gastrointestinal Infection | Yes (aOR 1.45) | Yes (aOR 2.45) | No |
Note: aOR = adjusted odds ratio
Conclusion
This study underscores the importance of addressing sleep debt and optimizing shift work schedules to protect the health of nurses. By implementing strategies to promote consistent sleep and reduce workload-related stressors, healthcare organizations can create a healthier work environment and reduce infection risks among their nursing staff.
Further Reading
For more detailed data,refer to the full study published in Chronobiology International*: Access the Abstract/Full text