TY - JOUR
T1 - Dietary intake of total, heme and non-heme iron and the risk of colorectal cancer in a European prospective cohort study
AU - Aglago, Elom K
AU - Cross, Amanda J
AU - Riboli, Elio
AU - Fedirko, Veronika
AU - Hughes, David J
AU - Fournier, Agnes
AU - Jakszyn, Paula
AU - Freisling, Heinz
AU - Gunter, Marc J
AU - Dahm, Christina C
AU - Overvad, Kim
AU - Tjønneland, Anne
AU - Kyrø, Cecilie
AU - Boutron-Ruault, Marie-Christine
AU - Rothwell, Joseph A
AU - Severi, Gianluca
AU - Katzke, Verena
AU - Srour, Bernard
AU - Schulze, Matthias B
AU - Wittenbecher, Clemens
AU - Palli, Domenico
AU - Sieri, Sabina
AU - Pasanisi, Fabrizio
AU - Tumino, Rosario
AU - Ricceri, Fulvio
AU - Bueno-de-Mesquita, Bas
AU - Derksen, Jeroen W G
AU - Skeie, Guri
AU - Jensen, Torill Enget
AU - Lukic, Marko
AU - Sánchez, Maria-Jose
AU - Amiano, Pilar
AU - Colorado-Yohar, Sandra
AU - Barricarte, Aurelio
AU - Ericson, Ulrika
AU - van Guelpen, Bethany
AU - Papier, Keren
AU - Knuppel, Anika
AU - Casagrande, Corinne
AU - Huybrechts, Inge
AU - Heath, Alicia K
AU - Tsilidis, Konstantinos K
AU - Jenab, Mazda
PY - 2023/4
Y1 - 2023/4
N2 - BACKGROUND: Iron is an essential micronutrient with differing intake patterns and metabolism between men and women. Epidemiologic evidence on the association of dietary iron and its heme and non-heme components with colorectal cancer (CRC) development is inconclusive.METHODS: We examined baseline dietary questionnaire-assessed intakes of total, heme, and non-heme iron and CRC risk in the EPIC cohort. Sex-specific multivariable-adjusted hazard ratios (HRs) and 95% confidence intervals (CIs) were computed using Cox regression. We modelled substitution of a 1 mg/day of heme iron intake with non-heme iron using the leave one-out method.RESULTS: Of 450,105 participants (318,680 women) followed for 14.2 ± 4.0 years, 6162 (3511 women) developed CRC. In men, total iron intake was not associated with CRC risk (highest vs. lowest quintile, HR
Q5vs.Q1:0.88; 95%CI:0.73, 1.06). An inverse association was observed for non-heme iron (HR
Q5vs.Q1:0.80, 95%CI:0.67, 0.96) whereas heme iron showed a non-significant association (HR
Q5vs.Q1:1.10; 95%CI:0.96, 1.27). In women, CRC risk was not associated with intakes of total (HR
Q5vs.Q1:1.11, 95%CI:0.94, 1.31), heme (HR
Q5vs.Q1:0.95; 95%CI:0.84, 1.07) or non-heme iron (HR
Q5vs.Q1:1.03, 95%CI:0.88, 1.20). Substitution of heme with non-heme iron demonstrated lower CRC risk in men (HR:0.94; 95%CI: 0.89, 0.99).
CONCLUSIONS: Our findings suggest potential sex-specific CRC risk associations for higher iron consumption that may differ by dietary sources.
AB - BACKGROUND: Iron is an essential micronutrient with differing intake patterns and metabolism between men and women. Epidemiologic evidence on the association of dietary iron and its heme and non-heme components with colorectal cancer (CRC) development is inconclusive.METHODS: We examined baseline dietary questionnaire-assessed intakes of total, heme, and non-heme iron and CRC risk in the EPIC cohort. Sex-specific multivariable-adjusted hazard ratios (HRs) and 95% confidence intervals (CIs) were computed using Cox regression. We modelled substitution of a 1 mg/day of heme iron intake with non-heme iron using the leave one-out method.RESULTS: Of 450,105 participants (318,680 women) followed for 14.2 ± 4.0 years, 6162 (3511 women) developed CRC. In men, total iron intake was not associated with CRC risk (highest vs. lowest quintile, HR
Q5vs.Q1:0.88; 95%CI:0.73, 1.06). An inverse association was observed for non-heme iron (HR
Q5vs.Q1:0.80, 95%CI:0.67, 0.96) whereas heme iron showed a non-significant association (HR
Q5vs.Q1:1.10; 95%CI:0.96, 1.27). In women, CRC risk was not associated with intakes of total (HR
Q5vs.Q1:1.11, 95%CI:0.94, 1.31), heme (HR
Q5vs.Q1:0.95; 95%CI:0.84, 1.07) or non-heme iron (HR
Q5vs.Q1:1.03, 95%CI:0.88, 1.20). Substitution of heme with non-heme iron demonstrated lower CRC risk in men (HR:0.94; 95%CI: 0.89, 0.99).
CONCLUSIONS: Our findings suggest potential sex-specific CRC risk associations for higher iron consumption that may differ by dietary sources.
UR - http://www.scopus.com/inward/record.url?scp=85147694973&partnerID=8YFLogxK
U2 - 10.1038/s41416-023-02164-7
DO - 10.1038/s41416-023-02164-7
M3 - Journal article
C2 - 36759722
SN - 0007-0920
VL - 128
SP - 1529
EP - 1540
JO - British Journal of Cancer
JF - British Journal of Cancer
IS - 8
ER -