Long-term use of lithium and risk of colorectal adenocarcinoma: a nationwide case-control study

Anton Pottegård, Zandra Nymand Ennis, Jesper Hallas, Boye L Jensen, Kirsten Madsen, Søren Friis

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

BACKGROUND: Lithium accumulates in the colon and inhibits the enzyme GSK-3β that possesses anti-carcinogenic effects. We therefore examined the association between lithium use and colorectal cancer risk in a nationwide study.

METHODS: We used the Danish Cancer Registry to identify all patients diagnosed with incident colorectal adenocarcinoma during 2000-2012 (n=36 248). Using a matched case-control approach, we estimated the association between long-term use (⩾5 years) of lithium and risk of colorectal adenocarcinoma using conditional logistic regression.

RESULTS: Long-term use of lithium was similar among cases (0.22%) and controls (0.20%), yielding an odds ratio of 1.13 (95% confidence interval (CI), 0.89-1.43) for colorectal adenocarcinoma. Dose-response, subgroup and other subanalyses returned neutral associations. However, ORs differed for colorectal subsites (proximal colon: 1.01 (95% CI, 0.66-1.55; distal colon: 1.52 (95% CI, 1.05-2.20); and rectum: 0.80 (95% CI, 0.50-1.30).

CONCLUSIONS: Lithium use was not associated with an overall increased risk of colorectal adenocarcinoma. The variation by subsite warrants further investigation.

Original languageEnglish
JournalB J C
Volume114
Issue number5
Pages (from-to)571-575
ISSN0007-0920
DOIs
Publication statusPublished - 1. Mar 2016

Keywords

  • Denmark
  • adenocarcinoma
  • case-control
  • colorectal cancer
  • lithium
  • pharmacoepidemiology

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