Korean J Urol Oncol.  2019 Dec;17(3):119-124. 10.22465/kjuo.2019.17.3.119.

History of Diabetes Mellitus and Risk of Prostate Cancer: A Meta-Epidemiological Study of Population-Based Cohort Studies in East Asian Men

Affiliations
  • 1Department of Preventive Medicine, Jeju National University College of Medicine, Jeju, Korea. jmbae@jejunu.ac.kr

Abstract

PURPOSE
Seven quantitative systematic reviews previously published showed that the direction of risk of prostate cancer associated with history of diabetes mellitus was in the opposite. The aim of this meta-epidemiological meta-analysis (MEMA) was to evaluate the effect size and direction of the prostate cancer risk associated with history of diabetes mellitus in Far East Asian men from population-based cohort studies.
MATERIALS AND METHODS
The primary subjects of MEMA were the 7 Asian cohort studies selected by related systematic reviews. Additional articles were searched from the primary subjects using citation discovery tools. The study having the longest follow-up period was selected from studies having the same cohorts. Random effect model was applied to estimate a summary relative risk (sRR) and its 95% confidence intervals (CIs). Egger test was used to evaluate a publication bias.
RESULTS
Three cohort studies were selected finally. These participants were population of Korea, Taiwan, and Japan, respectively, and total participants were 1,475,465. The direction of risk among 3 studies of Far East Asian men was in the opposite direction. The sRR (and its 95% CI) (I-squared value) was 1.07 (0.71-1.62) (86.1%).
CONCLUSIONS
This MEMA found that the direction as well as effect size of risk of prostate cancer associated with history of diabetes mellitus in Far East Asian men were inconsistent and heterogenous. To overcome them, it would be necessary to elongate cohort follow-up period, to adjust for potential confounders including socioeconomic status, and to consider conducting rates of prostate specific antigen test by national screening guideline.

Keyword

Diabetes mellitus; Prostate neoplasm; Meta-analysis; Cohort studies

MeSH Terms

Asian Continental Ancestry Group*
Cohort Studies*
Diabetes Mellitus*
Far East
Follow-Up Studies
Humans
Japan
Korea
Male
Mass Screening
Prostate*
Prostate-Specific Antigen
Prostatic Neoplasms*
Publication Bias
Social Class
Taiwan
Prostate-Specific Antigen
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