Abstract:
:Initial studies have investigated the association between inflammation and colorectal cancer (CRC) using C-reactive protein (CRP) as a proinflammatory biomarker and have noted inconsistent results among women. We here report the findings from a large prospective study with repeat measurements of CRP, as well as serum amyloid A (SAA), an additional biomarker of inflammation, and risk of CRC. In the Women's Health Initiative Observational Study, we examined associations of CRP and SAA with CRC using repeat assessments (baseline and 3-year follow-up) among 953 matched case-control pairs for CRP and 966 pairs for SAA. Multivariate-adjusted conditional-logistic regression models were used with two-sided tests of significance. Receiver operating characteristic (ROC) curve analysis assessed their utility as early detection markers. Colon cancer risk (odds ratio [OR] and 95% confidence intervals) among women in the highest quintiles of CRP or SAA compared to those in the lowest quintiles was ORcolon/CRP = 1.37 (0.95-1.97, p-trend = 0.04) and ORcolon/SAA = 1.26 (0.88-1.80, p-trend = 0.10), respectively. Women with elevated concentrations of both CRP and SAA had an increased risk of ORcolon = 1.50 (1.12-2.00, p-value = 0.006) compared to those with low concentrations. No positive associations were observed with rectal cancer and weaker associations for CRC overall. Temporal changes in biomarkers more than 3 years did not predict risk. The area under the 6-month ROC curve for CRP+SAA was 0.62 (95% confidence interval = 0.55-0.68). Elevated inflammatory biomarkers are associated with an increased risk of CRC, mainly colon cancer. Nevertheless, changes in the biomarkers over time do not suggest that they merit consideration as early detection markers for CRC.
journal_name
Int J Cancerjournal_title
International journal of cancerauthors
Toriola AT,Cheng TY,Neuhouser ML,Wener MH,Zheng Y,Brown E,Miller JW,Song X,Beresford SA,Gunter MJ,Caudill MA,Ulrich CMdoi
10.1002/ijc.27942subject
Has Abstractpub_date
2013-06-01 00:00:00pages
2648-58issue
11eissn
0020-7136issn
1097-0215journal_volume
132pub_type
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