Expected difference in total cognitive z-scorea (95% confidence interval)
p-value for interaction
−0.061 (-0.115, -0.007)
0.073 (-0.081, 0.228)
−0.071 (-0.132, -0.009)
−0.024 (-0.131, 0.082)
Abbreviations: HFE, hemochromatosis gene; BC, black carbon.
aAdjusted for age, education, first language, computer experience, physical activity, alcohol consumption, diabetes, dark fish consumption, percentage of residential census tract that is nonwhite, percentage of residential census tract adults with a college degree, indicator for first cognitive assessment, and indicator for part-time resident.