Yang, KemingPrescott, JenniferHazra, AditiMeyerhardt, Jeffrey A.Zhang, XuehongDe Vivo, ImmaculataChan, Andrew T.Du, MengmengGiovannucci, Edward L.Nan, Hongmei2024-04-302024-04-302022Yang K, Prescott J, Hazra A, et al. Pre-diagnostic telomere length and colorectal cancer risk. Cancer Epidemiol. 2022;77:102100. doi:10.1016/j.canep.2022.102100https://hdl.handle.net/1805/40356Background: Progressive telomere shortening may be related to genomic instability and carcinogenesis. Prospective evidence relating telomere length (TL) with colorectal cancer (CRC) risk has been limited and inconsistent. Methods: We examined the association between pre-diagnostic peripheral blood leukocyte TL and CRC risk in two matched case-control studies nested within the Nurses' Health Study (NHS) and the Health Professionals Follow-Up Study (HPFS). Relative leukocyte TL was measured using qPCR among 356 incident CRC cases and 801 controls (NHS: 186/465, HPFS: 170/336). Results: We did not find a significant association between pre-diagnostic TL and CRC risk [in all participants, multivariable-adjusted odds ratio (OR) (95% CI) for TL Quartile 1 (shortest) vs. Quartile 4 (longest) = 1.36 (0.85, 2.17), P-trend = 0.27; OR (95% CI) per 1 SD decrease in TL = 1.12 (0.92, 1.36)]. Conclusions: Our prospective analysis did not support a significant association between pre-diagnostic leukocyte TL and CRC risk.en-USPublisher PolicyTelomere lengthPeripheral blood leukocyteColorectal cancerColon cancerRectal cancerNested case-control studyArticle