Common beliefs linking stress, loneliness, and grief to an increased risk of cancer are not supported by scientific evidence, according to a large international study. The research, conducted by scientists at the University Medical Center Groningen (UMCG), analyzed data from over 420,000 individuals and challenges a widely held assumption about the causes of cancer. Understanding the true factors that contribute to cancer development is crucial for public health initiatives and individual well-being.
Researchers found no correlation between psychosocial factors – such as stress, loneliness, or the loss of a loved one – and the development of cancer. “Our research refutes a commonly held myth,” said researcher Lonneke van Tuijl. The study builds on previous findings that depression and anxiety also do not increase cancer risk, and that a positive outlook does not necessarily prevent it.
“You can’t simply change who you are or what you’ve experienced, and we’re showing that getting cancer isn’t your fault,” van Tuijl explained. Whereas initial analyses suggested a slight increase in lung cancer risk among those experiencing social isolation, this effect disappeared after accounting for known risk factors like smoking and alcohol consumption.
The study highlights the importance of distinguishing between emotional experiences and health behaviors. According to the research, individuals experiencing depression or high stress levels may adopt unhealthy habits, such as smoking, which are known to increase cancer risk. “In this case, the risk is not increased due to emotions or personality, but as a result of health behavior,” van Tuijl stated.
The impact of losing a loved one on lung cancer risk proved more complex. A limited increased risk remained even after adjusting for known risk factors, suggesting that factors beyond smoking or individual health habits may be involved. “Smoking or other individual risk factors cannot fully explain this connection,” van Tuijl noted. More information about the study is available from UMCG news.
Similar findings were published in August 2023, demonstrating that depression and anxiety do not lead to more cancer diagnoses, based on years of international research led by van Tuijl. Details of that research can be found at Kanker-Actueel. RTV Noord also reported on the UMCG findings, emphasizing the debunking of the myth linking stress and cancer.
