Sleep Duration and Prostate Cancer Risk
Author Information
Author(s): Kakizaki M, Inoue K, Kuriyama S, Sone T, Matsuda-Ohmori K, Nakaya N, Fukudo S, Tsuji I
Primary Institution: Tohoku University Graduate School of Medicine
Hypothesis
Is there an association between sleep duration and the risk of prostate cancer in Japanese men?
Conclusion
The study found that longer sleep duration is associated with a lower risk of prostate cancer in Japanese men.
Supporting Evidence
- Men who slept 9 hours or more had a hazard ratio of 0.48 for prostate cancer compared to those who slept less.
- The study included a large sample size of 22,320 men.
- Statistical analyses were performed using SAS software, with a significance level set at p<0.05.
Takeaway
Sleeping more might help protect against prostate cancer. The study showed that men who slept 9 hours or more had a lower chance of getting prostate cancer.
Methodology
This was a prospective cohort study involving 22,320 Japanese men, assessing sleep duration and prostate cancer incidence.
Potential Biases
Self-reported data may introduce bias regarding sleep duration.
Limitations
Sleep duration was self-reported, and there was no information on sleep quality or other factors that could influence sleep.
Participant Demographics
The study included Japanese men aged 40-79 years.
Statistical Information
P-Value
0.02
Confidence Interval
0.29–0.79
Statistical Significance
p<0.05
Digital Object Identifier (DOI)
Want to read the original?
Access the complete publication on the publisher's website