Reproductive Factors and Thyroid Cancer Risk in Norwegian Women
Author Information
Author(s): L.A. Akslen, S. Nilssen, G. Kvale
Primary Institution: University of Bergen, Bergen, Norway
Hypothesis
Do reproductive factors influence the risk of thyroid cancer in women?
Conclusion
The study found no strong associations between reproductive factors and thyroid cancer risk, but late last birth was related to increased risk.
Supporting Evidence
- Late last birth was associated with increased risk of thyroid cancer.
- Women with early menarche and late menopause had a decreased risk of follicular carcinomas.
- The risk of thyroid cancer was significantly increased among women in the occupational category 'fishing, ships officers and crew'.
Takeaway
This study looked at a lot of women to see if having babies or other reproductive factors affected their chances of getting thyroid cancer, and it found some links but not strong ones.
Methodology
The study followed 63,090 women from Norway over 29 years, collecting data on reproductive factors through interviews and linking it to cancer registry data.
Potential Biases
Potential misclassification of reproductive factors due to incomplete data.
Limitations
The number of thyroid cancer cases was relatively small, and some reproductive data were incomplete for younger participants.
Participant Demographics
Participants were Norwegian women aged 32-74 years at the start of the study.
Statistical Information
P-Value
0.06
Confidence Interval
95% CI: 1.30-3.54
Statistical Significance
p=0.06
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