WHI study links sleep duration, quality to aggressive breast cancer
Access to the full content of this site is available only to registered healthcare professionals.
Register to read more
Why this matters
- In women diagnosed with breast cancer, poor sleep quality or short duration are associated with breast cancer aggressiveness.
- Results vary by race/ethnicity.
- The findings suggest that improving sleep duration and quality might be associated with less aggressive tumor characteristics.
- Observational study of 4171 white women and 235 black women diagnosed with incident breast cancer in the Women's Health Initiative (WHI; 1994-2013).
- Baseline sleep duration and quality were compared with tumor grade, stage, hormone receptor status, and human epidermal growth factor receptor 2 status using logistic regression.
- 3 measures of sleep quality were studied: very sound or restful sleep, average sleep, and restless or very restless sleep.
- Funding: US National Institutes of Health.