Abstract
The relationship between obesity and prostate cancer remains unclear. We investigated the effect of prostate volume on the obesity and prostate cancer association. With a multi-centered, rapid-recruitment protocol, weight and body size measurements were collected prior to diagnosis, and medical charts were reviewed for pathology results (n = 420 controls, 119 high-grade prostatic intraepithelial neoplasia (PIN) cases, and 286 cancer cases (41% Gleason > 6). In multivariable logistic regression models adjusting for age, PSA levels and history, DRE results, and number of cores at biopsy, the association between BMI and cancer was restricted to men with a smaller prostate volume (volume < 40 cm3: ORBMI ≥ 30 = 2.17 (1.09, 4.32), p trend = 0.02; volume ≥ 40 cm3: ORBMI ≥ 30 = 0.77 (0.34, 1.77), p trend = 0.17; p interaction = 0.03). Similarly, the WHR and PIN association was significantly modified by prostate volume (volume < 40 cm3: OR(WHR: Tertile 3 vs. T1) = 3.76 (1.54, 9.21) (p trend < 0.01); volume ≥ 40 m3: OR(WHR: T3 vs. T1) = 0.63 (0.32, 1.23) (p trend = 0.17); p interaction < 0.01). In conclusion, prostate volume acts as a modifier, and BMI and WHR are significantly associated with prostate cancer or PIN, respectively, in the absence of biopsy sampling error derived from obesity-related prostate enlargement.
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Abbreviations
- BMI:
-
Body mass index
- WST:
-
Waist circumference
- WHR:
-
Waist-to-hip ratio
- PIN:
-
High-grade prostatic intraepithelial neoplasia
- OR:
-
Odds ratio
- CI:
-
Confidence interval
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Acknowledgments
Funds were been provided by the NIH CA98348, DAMD17-02-1-0139, and M01 RR00095 to the Vanderbilt General Clinical Research Center.
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Fowke, J.H., Motley, S.S., Wills, M. et al. Prostate volume modifies the association between obesity and prostate cancer or high-grade prostatic intraepithelial neoplasia. Cancer Causes Control 18, 375–384 (2007). https://doi.org/10.1007/s10552-007-0119-x
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DOI: https://doi.org/10.1007/s10552-007-0119-x