Monday May 27, 2019

Night shifts may increase cancer risk

A positive association between night shifts and risk of cancer

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Night shifts increase cancer risk. Pexels
Night shifts increase cancer risk. Pexels
  • Long-term night shift work among women increased the risk of cancer by 19%.
  • A meta-analysis using using international data from 61 articles comprising 114,628 cancer cases and 3,909,152 participants.
  • These studies found an association between long-term night shift work and risk of 11 types of cancer.

Women who work overnight have a comparatively high risk of developing cancer than women who do not, say researchers. An analysis of international data has confirmed an association between night-shifts and cancer.

“Our study indicates that night shift work serves as a risk factor for common cancers in women,” said Xuelei Ma, co-author of the study from West China Medical Center of Sichuan University in Chengdu, China.

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Findings

These studies found an association between long-term night shift work and risk of 11 types of cancer. Wikimedia commons
These studies found an association between long-term night shift work and risk of 11 types of cancer. Wikimedia commons
  • Long-term night shift work among women increased the risk of cancer by 19 percent.
  • Nurses (working in night shifts) had the highest risk of breast cancer, of all the occupations analysed.
  • The population of women working on night shifts have an increase risk of skin (41%), breast (32%) and gastrointestinal cancer (18%).
  • Among female nurses alone, those who worked the night shift had an increased risk of breast (58%), gastrointestinal (35%) and lung cancer (28%).

Methodology

  • A meta-analysis using data from 61 articles comprising 114,628 cancer cases and 3,909,152 participants from North Amercia, Europe, Australia and Asia.
  • The articles consisted of 26 cohort studies, 24 case-control studies and 11 nested case-control studies.
  • These studies found an association between long-term night shift work and risk of 11 types of cancer.

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“Nurses that worked the night shift were of a medical background and may have been more likely to undergo screening examinations,” the researcher suggested.

The results might help establish and implement effective measures to protect female night shifters. Pixabay
The results might help establish and implement effective measures to protect female night shifters. Pixabay

“Long-term night shift workers should have regular physical examinations and cancer screenings,” Ma noted.

The study was published in journal Cancer Epidemiology. (IANS)

Next Story

Women with Sleep Apnea at Greater Cancer Risk, Warn Researchers

The data showed that 2.8 per cent of all women had been diagnosed with a serious cancer compared to 1.7 per cent of all men in the group

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Previous research has shown that obesity and high-fat diets both together and independently increase the risk of pancreatic cancer.
The actress was diagnosed with cancer earlier this year. Pixabay

Women with obstructive sleep apnea (OSA) are more likely to be diagnosed with cancer than men with the condition, warn researchers.

Common symptoms of sleep apnea, include snoring, disrupted sleep and fatigue.

“Our study of more than 19,000 people shows that the severity of OSA is linked to a cancer diagnosis,” said study lead author Athanasia Pataka, Assistant Professor at Aristotle University of Thessaloniki in Greece.

“This link was especially strong in the women that we analysed, and less so in the men, and the study suggests that severe OSA could be an indicator for cancer in women, though more research is needed to confirm these findings,” Pataka explained.

In people suffering from OSA, the airways close completely or partially many times during sleep, reducing the levels of oxygen in the blood.

Cancer patient
Cancer patient.

The researchers analysed data from 19,556 people (5,789 women and 13,767 men) included in the European Sleep Apnoea Database (ESADA) to explore the link between OSA severity, low blood oxygen levels and cancer development.

The researchers looked at the number of times the participants experienced partial or complete airways closure per hour of sleep, as well as the number of times their blood oxygen levels dropped below 90 per cent at night.

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The data showed that 2.8 per cent of all women had been diagnosed with a serious cancer compared to 1.7 per cent of all men in the group.

The study, published in the European Respiratory Journal, suggests that people who experience more closures of the airways during sleep and whose blood oxygen saturation levels drop below 90 per cent more frequently are more likely to be diagnosed with cancer than people without OSA. (IANS)