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Diabetes mellitus and cancer risk: pooled analysis of eight cohort studies in Japan.

Authors
  • Sasazuki, Shizuka
  • Charvat, Hadrien
  • Hara, Azusa
  • Wakai, Kenji
  • Nagata, Chisato
  • Nakamura, Kozue
  • Tsuji, Ichiro
  • Sugawara, Yumi
  • Tamakoshi, Akiko
  • Matsuo, Keitaro
  • Oze, Isao
  • Mizoue, Tetsuya
  • Tanaka, Keitaro
  • Inoue, Manami
  • Tsugane, Shoichiro
Type
Published Article
Journal
Cancer science
Publication Date
Nov 01, 2013
Volume
104
Issue
11
Pages
1499–1507
Identifiers
DOI: 10.1111/cas.12241
PMID: 23889822
Source
Medline
License
Unknown

Abstract

Although a growing body of evidence suggests a link between diabetes and cancer, it is not clear whether diabetes independently increases the risk of cancer. We conducted a comprehensive assessment of the association between pre-existing diabetes and total and site-specific cancer risk based on a pooled analysis of eight cohort studies in Japan (>330 000 subjects). We estimated a summary hazard ratio by pooling study-specific hazard ratios for total and site-specific cancer by using a random-effects model. A statistically increased risk was observed for cancers at specific sites, such as colon (hazard ratio; HR = 1.40), liver (HR = 1.97), pancreas (HR = 1.85) and bile duct (HR = 1.66; men only). Increased risk was also suggested for other sites, and diabetes mellitus was associated with an overall 20% increased risk in total cancer incidence in the Japanese population. The association between these two diseases has important implications for reiterating the importance of controlling lifestyle factors and may suggest a possible strategy for cancer screening among patients with diabetes. Studies continuously investigating the risk factors for diabetes are also important.

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