METHODS: A total of 6,627 participants 59.0 13.3 years 52.6 women, 49.7 Non Hispanic Whites without CVD from the Third National Health and Nutrition Examination Survey were included in this analysis. QT was automatically measured from digital 12 lead electrocardiogram in a central reading center. A multivariable logistic regression model was used to examine the cross sectional association between tertiles of TB and prolonged QT interval 450 ms in men and 460 ms in women . ...