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Table 7 Conditional effect of LINE-1 methylation on HRV, controlled for PM 2.5

From: Heart rate variability and DNA methylation levels are altered after short-term metal fume exposure among occupational welders: a repeated-measures panel study

  Unadjusted regression Adjusted regressiona
β 95% CI p-value β 95% CI p-value
SDNN b (msec) 0.04 (-0.000 ~ 0.08) 0.053 0.02 (-0.04 ~ 0.07) 0.514
rMSSD b (msec) 0.05 (0.01 ~ 0.08) 0.020 0.04 (-0.01 ~ 0.10) 0.130
pNN10 (%) 0.01 (-0.002 ~ 0.03) 0.085 0.02 (-0.01 ~ 0.04) 0.189
pNN20 (%) 0.01 (-0.004 ~ 0.03) 0.128 0.01 (-0.01 ~ 0.03) 0.442
LF b (msec2) 0.09 (0.01 ~ 0.17) 0.026 0.05 (-0.06 ~ 0.16) 0.336
HF b (msec2) 0.10 (0.004 ~ 0.20) 0.043 0.10 (-0.04 ~ 0.24) 0.162
  1. a Adjusted for age, starting time of the day, season, sampling year, current smoking status, and second-hand smoke exposure.
  2. b The outcome measurements were natural log (ln)-transformed.