Large Study Suggests Marriage May Be Associated With Reduced Cancer Risk: Study

Being single may carry hidden health risks-new research suggests a higher likelihood of cancer among those never married. A study by University of Miami, published in Cancer Research Communication, found that cancer incidence was 68% higher in never-married men and 85% higher in never-married women compared to those married or previously married. The findings are based on analysis of over 4 million cancer cases across 12 US states between 2015 and 2022. However, researchers clarified that marriage itself does not prevent cancer, but lifestyle and social factors linked to marital status may influence risk.

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Experts noted that factors such as smoking, stress, lack of screenings, and reproductive history could explain the difference. Certain cancers like cervical and anal cancer—linked to HPV—showed significantly higher rates among unmarried individuals, possibly due to lower screening or healthcare engagement. The study highlights the need for greater awareness and preventive care among single adults. Researchers emphasised that marital status is only one of many social indicators and should not be seen as a direct cause, but as a signal for targeted health interventions.

Reference: Paulo S. Pinheiro, Amber N. Balda, Hannah M. Cranford, Tracy E. Crane, Erin N. Kobetz, Frank J. Penedo; Marriage and Cancer Risk: A Contemporary Population-Based Study Across Demographic Groups and Cancer Types. Cancer Research Communications 1 April 2026; 6 (4): 783–791. https://doi.org/10.1158/2767-9764.CRC-25-0814