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Sedentary Behavior and Prostate Cancer Risk in the NIH-AARP Diet and Health Study

By:
Contributors: Karen A. Kopciuk, PhD
Cancer Epidemiol Biomarkers Prev. 2014 May;23(5):882-9. doi: 10.1158/1055-9965.EPI-13-0808. Epub 2014 Feb 13.

Abstract

Sedentary behavior (sitting time) has been proposed as an independent risk factor for some cancers; however, its role in the development of prostate cancer has not been determined. We examined the prospective associations of self-reported daily sitting time and daily television/video viewing time with the risk of developing or dying from prostate cancer among 170,481 men in the NIH-AARP Diet and Health Study. We estimated HRs and 95% confidence intervals (CI) using Cox proportional hazards regression. Between 1996 and 2006, there were 13,751 incident (including 1,365 advanced) prostate cancer cases identified; prostate cancer mortality (through 2008) was 669. No strong or significant association with prostate cancer risk was seen in fully adjusted models for either daily sitting or television/video time. There were some suggestions of effect modification by body mass index (BMI; interaction for television/video time and BMI, P = 0.02). For total prostate cancer risk, television/video time was associated with a slightly elevated, but nonsignificant, increase amongst obese men (HR = 1.28; 95% CI, 0.98-1.69); a null association was observed amongst overweight men (HR = 1.04; 0.89-1.22); and, for men with a normal BMI, television/video time was associated with a nonsignificant risk decrease (HR = 0.82; 95% CI, 0.66-1.01). Similar patterns were observed for total daily sitting and television/video time in advanced prostate cancer and prostate cancer mortality. Sedentary behavior seems to play a limited role in the development of prostate cancer; however, we cannot rule out potential effect modification by BMI or the impact of measurement error on results.

PubMed

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APCaRI Registry and Biorepository enrolls 1500th participant – 30% of our goal

We are pleased to announce that the Alberta Prostate Cancer Registry and Biorepository reached 30% of its accrual goal by enrolling participant 1,500! To date more than 100,000 biosamples are stored in the Canadian Research Biorepository along with comprehensive clinical data – all available for cutting edge research.

This was possible thanks to our wonderful team of clinical research personnel, clinicians and partners who have been working collaboratively to reach our goals!

If you are interested in accessing biospecimens or clinical information, let us know at catalina.vasquez@ualberta.ca

Samples available from participants with prostate cancer and age-matched men with negative biopsy
  • Serum (400uL/vial)
  • Plasma (400uL/vial)
  • Buffy Coat (~300uL/vial)
  • Red Blood Cells (400uL/vial)
  • Urine (400uL/vial)
  • Semen (~400uL/vial)
Clinical Information available
  • Demographic information and co-morbidities
  • Family history of prostate cancer
  • Pathology and diagnosis details
  • Clinical and pathological staging
  • Treatment history
  • Outcomes
  • Biospecimen collection, sample availability and processing details
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