Body size and composition and prostate cancer risk: systematic review and meta-regression analysis.

Full Abstract

The evidence that measures of obesity and stature are associated with prostate cancer is weak and inconsistent. We performed a systematic review and meta-analysis of the relationship between body mass index (BMI), height, weight, waist circumference and waist-to-hips ratio (WHR) and the risk of prostate cancer. Study-specific dose-response slopes were obtained, and random effects rate ratios (RRs) were computed from linear meta-regression models. We included 55,521 cases identified among 2,818,767 men from 31 cohort studies, and 13,232 cases and 16,317 controls from 25 case-control studies. The overall RR for BMI was 1.05 per 5 kg/m2 increment, 95% CI 1.01-1.08. For studies that reported results by stage of disease, the RRs were stronger for advanced disease (RR 1.12 per 5 kg/m2 increment, 95% CI 1.01-1.23) compared with localized disease (RR 0.96 per 5 kg/m2 increment, 95% CI 0.89-1.03), p = 0.02. Height was also positively associated with risk (RR 1.05 per 10 cm increment, 95% CI 1.02-1.09), but the evidence was weak for weight (RR 1.01 per 10 kg increment, 95% CI 0.97-1.04), waist circumference (RR 1.03 per 10 cm increment, 95% CI 0.99-1.07), and WHR (RR 1.11 per 0.1 unit increment, 95% CI 0.95-1.30). Stronger associations were observed among cohort studies compared with case-control studies for BMI (p = 0.006), height (p < 0.001) and weight (p = 0.02). This meta-analysis indicates that obesity is weakly associated with an increased risk of prostate cancer (particularly advanced stage tumors). While increased stature may also increase risk, there is little evidence for an association with central obesity.

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Author information

Author/s: MacInnis, Robert J (RJ); English, Dallas R (DR);

Affiliation: Cancer Epidemiology Centre, The Cancer Council Victoria, Carlton South, Melbourne, VIC, Australia. Robert.MacInnis(-atsign-)cancervic.org.au

Journal and publication information

Publication Type: Journal Article; Meta-Analysis

Journal: Cancer causes & control : CCC (Cancer Causes Control), published in Netherlands. (Language: eng)

Reference: 2006-Oct; vol 17 (issue 8) : pp 989-1003

Dates: Created 2006/08/25; Completed 2007/02/06;

PMID: 16933050, status: MEDLINE (last retrieval date: 12/26/2008)

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MeSH headings (categories)

This article was linked to the MESH Headings shown below.

Body Composition - physiology
Body Height
Body Mass Index
Body Size - physiology
Body Weight
Case-Control Studies
Cohort Studies

Humans
Male
Neoplasm Staging
Prostatic Neoplasms - epidemiology; pathology; physiopathology
Regression Analysis
Risk Factors
Waist-Hip Ratio

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