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Table 4 Modification of the association between a one standard deviation increase in 28-day BC and percent change in HFa

From: Exposure to sub-chronic and long-term particulate air pollution and heart rate variability in an elderly cohort: the Normative Aging Study

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
  1. BC black carbon, HF high frequency power, SD standard deviation
  2. 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