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1.
  • Häggstrom, Christel, et al. (författare)
  • Prospective Study on Metabolic Factors and Risk of Prostate Cancer
  • 2012
  • Ingår i: Cancer. - : Wiley. - 1097-0142 .- 0008-543X. ; 118:24, s. 6199-6206
  • Tidskriftsartikel (refereegranskat)abstract
    • BACKGROUND: There are inconsistent data regarding the association between metabolic factors, separately and combined, and the risk of prostate cancer and death from prostate cancer. METHODS: In the Metabolic Syndrome and Cancer Project (Me-Can), data on body mass index (BMI); blood pressure; and blood levels of glucose, cholesterol, and triglycerides were collected for 289,866 men. Cox proportional hazard models were used to calculate relative risks (RRs) by exposures in quintiles as well as for z scores (with a mean of 0 and a standard deviation of 1) together with a composite sum of scores to assess the combined effect of metabolic factors. RRs were corrected for random errors in measurement. RESULTS: During a mean follow-up of 12 years, 6673 men were diagnosed with prostate cancer and 961 died of the disease. Men with high levels of glucose and triglycerides were found to have a decreased risk of prostate cancer: top versus bottom quintile of glucose: RR, 0.82 (95% confidence interval [95% CI], 0.62-1.08; P value for trend = .03) and top versus bottom quintile of triglycerides: RR, 0.88 (95% CI, 0.74-1.04; P value for trend = .001). High BMI, elevated blood pressure, and a high composite z score were found to be associated with an increased risk of death from prostate cancer: top versus bottom quintile of BMI: RR, 1.36 (95% CI, 1.08-1.71); systolic blood pressure: RR, 1.62 (95% CI, 1.07-2.45); and per 1-unit increase of the composite z score: RR, 1.13 (95% CI, 1.03-1.25). CONCLUSIONS: The authors found no evidence of an association between high levels of metabolic factors and the risk of prostate cancer, but high BMI, elevated blood pressure, and a composite score of all metabolic factors were associated with an increased risk of death from prostate cancer. Cancer 2012;118:6199-206. (C) 2012 American Cancer Society.
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2.
  • Lilja, Hans, et al. (författare)
  • Prediction of Significant Prostate Cancer Diagnosed 20 to 30 Years Later With a Single Measure of Prostate-Specific Antigen at or Before Age 50
  • 2011
  • Ingår i: Cancer. - : Wiley. - 1097-0142 .- 0008-543X. ; 117:6, s. 1210-1219
  • Tidskriftsartikel (refereegranskat)abstract
    • BACKGROUND: We previously reported that a single prostate-specific antigen (PSA) measured at ages 44-50 was highly predictive of subsequent prostate cancer diagnosis in an unscreened population. Here we report an additional 7 years of follow-up. This provides replication using an independent data set and allows estimates of the association between early PSA and subsequent advanced cancer (clinical stage >= T3 or metastases at diagnosis). METHODS: Blood was collected from 21,277 men in a Swedish city (74% participation rate) during 1974-1986 at ages 33-50. Through 2006, prostate cancer was diagnosed in 1408 participants; we measured PSA in archived plasma for 1312 of these cases (93%) and for 3728 controls. RESULTS: At a median follow-up of 23 years, baseline PSA was strongly associated with subsequent prostate cancer (area under the curve, 0.72; 95% Cl, 0.70-0.74; for advanced cancer, 0.75; 95% Cl, 0.72-0.78). Associations between PSA and prostate cancer were virtually identical for the initial and replication data sets, with 81% of advanced cases (95% Cl, 77%-86%) found in men with PSA above the median (0.63 ng/mL at ages 44-50). CONCLUSIONS: A single PSA at or before age 50 predicts advanced prostate cancer diagnosed up to 30 years later. Use of early PSA to stratify risk would allow a large group of low-risk men to be screened less often but increase frequency of testing on a more limited number of high-risk men. This is likely to improve the ratio of benefit to harm for screening. Cancer 2011;117:1210-9. (C) 2010 American Cancer Society
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3.
  • Stocks, Tanja, 1977-, et al. (författare)
  • Metabolic factors and risk of colorectal cancer in the metabolic syndrome and cancer project (Me-Can)
  • 2011
  • Ingår i: Cancer. - : Wiley. - 0008-543X .- 1097-0142. ; 117:11, s. 2398-2407
  • Tidskriftsartikel (refereegranskat)abstract
    • Background The metabolic syndrome (MetS) has been related to an increased risk of colorectal cancer in some small studies, but it is unknown which factors in the MetS that are most strongly related to risk, and if there is an interaction between factors. Methods and Findings In the Metabolic syndrome and Cancer project (Me-Can), data on body mass index (BMI), blood pressure, and blood levels of glucose, cholesterol, and triglycerides were available in 289,866 men and 288,834 women. Mean age at baseline was 44.0 years and mean follow-up time was 12.0 years. During follow-up, 2,834 men and 1,861 women were diagnosed with colorectal cancer. We used Cox regression models to calculate relative risk (RR) of colorectal cancer by exposures transformed into Z scores (mean = 0, standard deviation = 1), and for a MetS Z score, and used regression calibration to correct exposure levels for random error in measurement. Significant increases in risk per one unit increment of factors were observed in men for BMI, RR 1.07 (95% confidence interval, 1.02-1.13), blood pressure, RR 1.10 (1.02-1.18), and triglycerides, RR 1.17 (1.06-1.28), and in women for BMI, RR 1.08 (1.01-1.15). The RR of colorectal cancer per one unit increment of the MetS Z score was 1.24 (1.18-1.31) in men, and 1.14 (1.06-1.22) in women. There was no significant positive interaction for any combination of two metabolic factors. Associations between metabolic factors and risk of fatal colorectal cancer were similar to those for incident cancer. Conclusions Our data add further evidence for an association between factors in the MetS, in single and combined, and risk of colorectal cancer. Our data do not support an interaction between factors in the MetS on risk.
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4.
  • Stocks, Tanja, et al. (författare)
  • Metabolic Factors and the Risk of Colorectal Cancer in 580,000 Men and Women in the Metabolic Syndrome and Cancer Project (Me-Can)
  • 2011
  • Ingår i: Cancer. - : Wiley. - 1097-0142 .- 0008-543X. ; 117:11, s. 2398-2407
  • Tidskriftsartikel (refereegranskat)abstract
    • BACKGROUND: The metabolic syndrome (MetS) has been related to an increased risk of colorectal cancer, but the modest size of previous studies precluded detailed characterization of the role of individual MetS factors and their interaction on risk. METHODS: In the Metabolic Syndrome and Cancer Project (Me-Can), data on body mass index (BMI), blood pressure, and blood levels of glucose, cholesterol, and triglycerides were available for 578,700 men and women. The mean age of participants at baseline was 44 years, and the mean follow-up was 12 years. Relative risks (RR) of colorectal cancer per 1 standard deviation increment in Z score of factors and for a combined MetS score, were calculated from Cox regression models, including adjustment for potential confounders. RESULTS: During follow-up, 2834 men and 1861 women were diagnosed with colorectal cancer. The RR of colorectal cancer for the MetS score was 1.25 (95% confidence interval [CI], 1.18-1.32) in men, and 1.14 (95% CI, 1.06-1.22) in women. Significant associations also were observed in men for BMI (RR, 1.07; 95% CI, 1.02-1.13), blood pressure (RR, 1.10; 95% CI, 1.02-1.18), and triglycerides (RR, 1.17; 95% CI, 1.06-1.28) and, in women, for BMI (RR, 1.08; 95% CI, 1.01-1.15). There was no significant positive interaction between the metabolic factors on risk. CONCLUSIONS: The combination of metabolic factors and some separate factors was related to an increased risk of colorectal cancer, but there was no interaction between metabolic factors. Cancer 2011; 117: 2398-407. (C) 2010 American Cancer Society.
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