TY - JOUR
T1 - Associations between fine particulate matter and colorectal cancer
T2 - a systematic review and meta-analysis
AU - Fu, Pengfei
AU - Li, Ruijin
AU - Sze, Stephen Cho Wing
AU - Yung, Ken Kin Lam
N1 - Funding Information:
This work was financially and partially supported by the Health and Medical Research Fund of Food and Health Bureau (No. 14151791), the Government of the Hong Kong Special Administrative Region, and by the Hong Kong Research Grants Council, Research Matching Scheme: (RMGS-2019-1-12, RMGS-2019-1-15). The funding organization(s) played no role in the study design; in the collection, analysis, and interpretation of data; in the writing of the report; or in the decision to submit the report for publication.
Publisher Copyright:
© 2023 Walter de Gruyter GmbH, Berlin/Boston
PY - 2023/2/22
Y1 - 2023/2/22
N2 - Colorectal cancer (CRC) is the second deadliest cancer worldwide. The impact of fine particulate matter (PM2.5) on many diseases is a global concern, yet its association with CRC is unclear. This study aimed to assess the effect of PM2.5 exposure on CRC. We searched PubMed, Web of Science, and Google Scholar databases for population-based articles published before September 2022, providing risk estimates with 95% confidence intervals (CI). Among 85,743 articles, we identified 10 eligible studies across multiple countries and regions in North America and Asia. We calculated the overall risk, incidence and mortality and performed subgroup analyses according to countries and regions. The results revealed an association between PM2.5 and increased risk of CRC (total risk, 1.19 [95% CI 1.12–1.28]; incidence, OR=1.18 [95% CI 1.09–1.28]; mortality, OR=1.21 [95% CI 1.09–1.35]). The elevated risks of CRC associated with PM2.5 were different across countries and regions, at 1.34 [95% CI 1.20–1.49], 1.00 [95% CI 1.00–1.00], 1.08 [95% CI 1.06–1.10], 1.18 [95% CI 1.07–1.29], 1.01 [95% CI 0.79–1.30], in the United States, China, Taiwan, Thailand, and Hong Kong, respectively. Incidence and mortality risks were higher in North America than those in Asia. In particular, the incidence and mortality were highest in the United States (1.61 [95% CI 1.38–1.89] and 1.29 [95% CI 1.17–1.42], respectively) than those in other countries. This study is the first comprehensive meta-analysis to find a strong association between PM2.5 exposure and increased CRC risk.
AB - Colorectal cancer (CRC) is the second deadliest cancer worldwide. The impact of fine particulate matter (PM2.5) on many diseases is a global concern, yet its association with CRC is unclear. This study aimed to assess the effect of PM2.5 exposure on CRC. We searched PubMed, Web of Science, and Google Scholar databases for population-based articles published before September 2022, providing risk estimates with 95% confidence intervals (CI). Among 85,743 articles, we identified 10 eligible studies across multiple countries and regions in North America and Asia. We calculated the overall risk, incidence and mortality and performed subgroup analyses according to countries and regions. The results revealed an association between PM2.5 and increased risk of CRC (total risk, 1.19 [95% CI 1.12–1.28]; incidence, OR=1.18 [95% CI 1.09–1.28]; mortality, OR=1.21 [95% CI 1.09–1.35]). The elevated risks of CRC associated with PM2.5 were different across countries and regions, at 1.34 [95% CI 1.20–1.49], 1.00 [95% CI 1.00–1.00], 1.08 [95% CI 1.06–1.10], 1.18 [95% CI 1.07–1.29], 1.01 [95% CI 0.79–1.30], in the United States, China, Taiwan, Thailand, and Hong Kong, respectively. Incidence and mortality risks were higher in North America than those in Asia. In particular, the incidence and mortality were highest in the United States (1.61 [95% CI 1.38–1.89] and 1.29 [95% CI 1.17–1.42], respectively) than those in other countries. This study is the first comprehensive meta-analysis to find a strong association between PM2.5 exposure and increased CRC risk.
KW - air pollution
KW - colorectal cancer
KW - meta-analysis
KW - PM2.5
UR - http://www.scopus.com/inward/record.url?scp=85149210645&partnerID=8YFLogxK
U2 - 10.1515/reveh-2022-0222
DO - 10.1515/reveh-2022-0222
M3 - Journal article
AN - SCOPUS:85149210645
SN - 0048-7554
JO - Reviews on Environmental Health
JF - Reviews on Environmental Health
ER -
