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Table 5 Correlation between BRS and physiologic markers, PM2.5 concentrations, or gaseous components

From: Inhaled ambient-level traffic-derived particulates decrease cardiac vagal influence and baroreflexes and increase arrhythmia in a rat model of metabolic syndrome

  ND MetS
HR (beats/min) 0.23* -0.28**
RMSSD (ms) 0.18 0.71***
SDNN (ms) 0.19 0.49***
CV 0.27** 0.40***
pNN15 - 0.59***
HF (ms2) - 0.58***
LF (ms2) - 0.71***
LF/HF - -0.13
SBP (mmHg) 0.00 -0.16
DBP (mmHg) 0.28** −0.08
PP (mmHg) −0.49*** −0.32***
dP/dt max (mmHg/s) −0.41*** −0.35***
rate × P (BPM × mmHg) −0.06 -0.27**
PR (ms) - 0.27**
QTcB (ms) - 0.32***
QTcF (ms) - 0.24**
QTe (ms) - −0.11
S min. Slope (mV × ms) - 0.01
ST amp (mV) - 0.13
TpTe (ms) - 0.17*
f (breaths/min) - -0.41***
T I (ms) - 0.07
T E (ms) - 0.36***
T T (ms) - 0.35***
Pause (s) - 0.14
PM2.5 mass (μg/m3) −0.04 -0.11
PM2.5 count (#/m3) −0.03 −0.05
NO (ppb) 0.00 −0.09
NOx (ppb) −0.01 −0.12
O3 (ppb) - 0.03
CO (ppm) - −0.04
  1. Pearson correlation coefficients for linear regression between BRS slope and various physiologic and exposure endpoints in MetS and ND-fed rats over the course of the entire exposure period, including both filtered air- and P + SOA-exposed animals. Pearson partial correlation was conducted for air pollutant concentrations. *, **, and *** indicate P < 0.05, 0.01, and 0.001, respectively. Dash alone indicates parameter was not analyzed