PURPOSE: Oxidative stress is possibly related to prostate carcinogenesis. We constructed a dietary antioxidant score, which is a measure of combined antioxidant exposures, and an oxidative balance score (OBS), which is a measure of combined antioxidant and pro-oxidant exposures. We hypothesized that both scores are inversely associated with the risk of prostate cancer (PCa). METHODS: We conducted a case-cohort study among 58,279 men in the Netherlands Cohort Study. Cohort members completed a baseline questionnaire. From 1986 to 2003, 3451 patients with PCa were identified including 1196 advanced cancers (stage III/IV). The antioxidant score and the OBS were created by summing quartile and category scores of individual score constituents, which had an equal weight. Pro-oxidants were scored in the opposite way to antioxidants. RESULTS: Both the antioxidant score and OBS were not associated with risk of overall PCa or PCa subgroups on the basis of disease stage. Most score constituents were not associated with the risk of PCa. Total catechin intake was associated with a decreased risk of stage IV PCa (greatest vs. lowest quartile: hazard ratio, 0.76; 95% confidence interval, 0.59-0.98). CONCLUSIONS: The antioxidant score and OBS were not associated with risk of overall and advanced-stage PCa.
PURPOSE: Oxidative stress is possibly related to prostate carcinogenesis. We constructed a dietary antioxidant score, which is a measure of combined antioxidant exposures, and an oxidative balance score (OBS), which is a measure of combined antioxidant and pro-oxidant exposures. We hypothesized that both scores are inversely associated with the risk of prostate cancer (PCa). METHODS: We conducted a case-cohort study among 58,279 men in the Netherlands Cohort Study. Cohort members completed a baseline questionnaire. From 1986 to 2003, 3451 patients with PCa were identified including 1196 advanced cancers (stage III/IV). The antioxidant score and the OBS were created by summing quartile and category scores of individual score constituents, which had an equal weight. Pro-oxidants were scored in the opposite way to antioxidants. RESULTS: Both the antioxidant score and OBS were not associated with risk of overall PCa or PCa subgroups on the basis of disease stage. Most score constituents were not associated with the risk of PCa. Total catechin intake was associated with a decreased risk of stage IV PCa (greatest vs. lowest quartile: hazard ratio, 0.76; 95% confidence interval, 0.59-0.98). CONCLUSIONS: The antioxidant score and OBS were not associated with risk of overall and advanced-stage PCa.
Authors: So Yeon Kong; Michael Goodman; Suzanne Judd; Roberd M Bostick; W Dana Flanders; William McClellan Journal: Ann Epidemiol Date: 2015-01-16 Impact factor: 3.797
Authors: Kjell M Russnes; Kathryn M Wilson; Mara M Epstein; Julie L Kasperzyk; Meir J Stampfer; Stacey A Kenfield; Sigbjørn Smeland; Rune Blomhoff; Edward L Giovannucci; Walter C Willett; Lorelei A Mucci Journal: Int J Cancer Date: 2013-11-11 Impact factor: 7.396
Authors: Kjell M Russnes; Elisabeth Möller; Kathryn M Wilson; Monica Carlsen; Rune Blomhoff; Sigbjørn Smeland; Hans-Olov Adami; Henrik Grönberg; Lorelei A Mucci; Katarina Bälter Journal: BMC Cancer Date: 2016-07-11 Impact factor: 4.430