Table 4.

Modification of the association between a one standard deviation increase in 28-day BC and percent change in HF^a

Characteristics	% change	95 % CI
Oxidative stress genetic score < median	−3.3	−7.4, 1.0
Oxidative stress genetic score > median	−1.8	−4.9, 1.5
P for interaction	0.55
Not obese	−1.7	−4.5, 1.2
Obese	−3.5	−7.4, 0.5
P for interaction	0.64
No diabetes	−2.1	−4.6, 0.4
Diabetes	−4.6	−10.6, 1.8
P for interaction	0.51
No hypertension	−2.2	−5.8, 1.5
Hypertension	−2.2	−5.0, 0.8
P for interaction	0.60

BC black carbon, HF high frequency power, SD standard deviation

^aWe evaluated effect modification of the association between a 1 SD increase in the 28 day moving average of BC exposure and percent change in HF; Normative Aging Study, 2000–2011