Oxidative Balance Score As Predictor of All-cause, Cancer, and Noncancer Mortality in a Biracial US Cohort

Overview

Journal Ann Epidemiol

Publisher Elsevier

Specialty Public Health

Date 2015 Feb 17

PMID 25682727

Citations 36

Authors

So Yeon Kong

Michael Goodman

Suzanne Judd

Roberd M Bostick

W Dana Flanders

William McClellan

Affiliations

Soon will be listed here.

Abstract

Purpose: We previously proposed an oxidative balance score (OBS) that combines pro- and anti-oxidant exposures to represent the overall oxidative balance status of an individual. In this study, we investigated associations of the OBS with all-cause and cause-specific mortality, and explored alternative OBS weighting methods in the Reasons for Geographic and Racial Differences in Stroke Study cohort.

Methods: The OBS was calculated by combining information from 14 a priori selected pro- and anti-oxidant factors and then divided into quartiles with the lowest quartile (predominance of pro-oxidants) as reference. Cox proportional hazard models were used to estimate adjusted hazard ratios and 95% confidence intervals for each OBS category compared with the reference.

Results: Over a median 5.8 years of follow-up, 2079 of the 21,031 participants died. The multivariable-adjusted hazard ratios (95% confidence interval) for all-cause, cancer, and noncancer mortality for those in the highest versus the lowest equal-weighting OBS quartile were 0.70 (0.61-0.81), 0.50 (0.37-0.67), and 0.77 (0.66-0.89), respectively (P trend < .01 for all). Similar results were observed with all weighting methods.

Conclusions: These results suggest that individuals with a greater balance of antioxidant to pro-oxidant lifestyle exposures may have lower mortality.

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