Abstract | BACKGROUND & AIMS: METHODS: We performed a case-cohort study within the Alpha-Tocopherol, Beta-Carotene Cancer Prevention (ATBC) Study (n=29,133). Baseline exposure and fasting serum biomarker data were available for 134 incident CRC case and 399 non-case subjects. HOMA-IR was derived as fasting insulin x fasting glucose/22.5. Hazard ratios (HRs) and 95% confidence intervals (CIs) were estimated by using age-adjusted and multivariable-adjusted Cox proportional hazards regression models. RESULTS: Median (interquartile range) values for serum insulin, glucose, and HOMA-IR were 4.1 (2.9-7.2) mIU/L, 101 (94-108) mg/dL, and 0.99 (0.69-1.98) for case subjects and 4.1 (2.7-6.1) mIU/L, 99 (93-107) mg/dL, and 1.02 (0.69-1.53) for non-case subjects, respectively. On the basis of comparison of the highest versus lowest quartiles for each biomarker, insulin (HR, 1.84; 95% CI, 1.03-3.30) and HOMA-IR (HR, 1.85; 95% CI, 1.06-3.24) were significantly associated with incident CRC, whereas glucose was marginally associated with incident CRC (HR, 1.70; 95% CI, 0.92-3.13) in age-adjusted risk models. However, trends across biomarker quartiles were somewhat inconsistent (P trend=.12, .04, and .12, respectively), and multivariable adjustment generally attenuated the observed risk estimates. CONCLUSIONS:
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Authors | Paul J Limburg, Rachael Z Stolzenberg-Solomon, Robert A Vierkant, Katherine Roberts, Thomas A Sellers, Philip R Taylor, Jarmo Virtamo, James R Cerhan, Demetrius Albanes |
Journal | Clinical gastroenterology and hepatology : the official clinical practice journal of the American Gastroenterological Association
(Clin Gastroenterol Hepatol)
Vol. 4
Issue 12
Pg. 1514-21
(Dec 2006)
ISSN: 1542-3565 [Print] United States |
PMID | 17162243
(Publication Type: Journal Article, Randomized Controlled Trial)
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Chemical References |
- Biomarkers, Tumor
- Blood Glucose
- Insulin
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Topics |
- Aged
- Biomarkers, Tumor
(blood)
- Blood Glucose
(metabolism)
- Colorectal Neoplasms
(blood, epidemiology, etiology)
- Finland
(epidemiology)
- Follow-Up Studies
- Humans
- Hyperinsulinism
(blood, complications, epidemiology)
- Incidence
- Insulin
(blood)
- Insulin Resistance
(physiology)
- Male
- Middle Aged
- Prognosis
- Proportional Hazards Models
- Prospective Studies
- Risk Factors
- Smoking
(adverse effects, epidemiology)
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