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Table 2 Correlation between the VHI domains and the time domain indices of heart rate variability

From: Vocal complaint in physical education teachers and its association with the cardiovascular system

  Functional Organic Emotional
  r p r p r p
Mean RR -0.01 0.96 -0.25 0.28 -0.30 0.20
Mean HR 0.02 0.93 0.25 0.28 0.33 0.16
SDNN 0.17 0.47 -0.21 0.37 0.09 0.70
RMSSD 0.30 0.21 -0.30 0.20 -0.17 0.48
NN50 0.13 0.57 -0.53 0.01 -0.04 0.86
pNN50 0.10 0.67 -0.53 0.01 -0.05 0.82
  1. VHI: Vocal handcap index.