Study Links Marital Status to Lower Cancer Incidence in US Adults

A study published in Cancer Research Communications examined cancer incidence by marital status among US adults aged 30 and older. Researchers from the University of Miami analyzed data from more than 100 million people and over 4 million cancer cases diagnosed between 2015 and 2022.

The findings indicate that never-married adults experienced higher cancer rates than those currently or previously married.

Never-married men had a 68% higher cancer incidence compared to married men. For never-married women, the increase was 85%. The association strengthened among individuals aged 55 and older, with differences accumulating over time.

“— Paulo Pinheiro, co-author and professor of cancer epidemiology, University of Miami, 2024 (Euronews)”

The study grouped marital status into never-married and ever-married categories, including separated, divorced, and widowed individuals. It covered all malignant cancers diagnosed from age 30, aligning with the average US first-marriage age. Data sources included national health surveys and cancer registries.

rates among never-married adults varied by cancer type. Never-married men had nearly five times the rate of anal cancer compared to married men. Never-married women faced almost three times the rate of cervical cancer. Oesophageal, liver, and lung cancer rates were approximately double for never-married individuals of both sexes compared to married ones.

These patterns suggest influences beyond demographics like age, race, and socioeconomic status. The researchers attributed potential factors to marriage-related benefits, including greater social support, healthier behaviors such as reduced alcohol and tobacco use, more stable sexual patterns, and economic security.

For HPV-related cancers like anal and cervical, differences may stem from varying exposure levels.

research has linked marriage to better overall health outcomes, including lower morbidity, longer life expectancy, and higher self-rated health. Married cancer patients often receive earlier diagnoses and have higher survival rates due to spousal involvement in screening, treatment, and care navigation. >

"It means that, if you’re not married, you should be paying extra attention to cancer risk factors, getting any screenings you may need, and staying up to date on health care."

“— Frank Penedo, co-author, University of Miami, 2024 (Euronews)”

The study does not imply marriage directly prevents cancer or recommend it as a strategy. Instead, it positions marital status as a social exposure factor capturing unmeasured cancer risk dimensions. Limitations include observational data, which cannot prove causation.