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Fig. 2 | Environmental Health

Fig. 2

From: Associations of air pollution exposure with blood pressure and heart rate variability are modified by oxidative stress genes: A repeated-measures panel among elderly urban residents

Fig. 2

Associations between ambient PM10 concentration and heart rate variability in generalized additive mixed models, stratified according to tertiles of genetic risk score for heart rate variability, Korean Elderly Environmental Panel Study, 2008–2010. Models were adjusted for age, sex, smoking status, alcohol drinking, body mass index, hypertension medication, and apparent temperature. The plots show the associations of ambient PM10 concentration with SDNN (a), RMSSD (b), LF (c), and HF (d) in the low genetic risk score group; the associations with SDNN (e), RMSSD (f), LF (g), and HF (h) in the moderate genetic risk score group; and the associations with SDNN (i), RMSSD (j), LF (k), and HF (l) in the high genetic risk score group. HF, high frequency power for frequency domain; LF, low frequency power for frequency domain; PM10, particulate matter ≤10 μm; RMSSD, root mean square of successive differences for time domain; SDNN, standard deviations of normal-to-normal intervals for time domain. Solid lines, spline curves; shaded area, 95 % confidence interval

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Environmental Health

ISSN: 1476-069X