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Table 4 Correlation between the VHI domains and the geometric 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
SD1 0.12 0.61 -0.26 0.26 0.05 0.81
SD2 0.15 0.52 -0.15 0.52 0.13 0.57
SD1/SD2 0.05 0.82 -0.20 0.40 -0.14 0.56
RRTri 0.14 0.54 -0.27 0.25 0.08 0.73
TINN 0.14 0.55 -0.15 0.53 0.24 0.31
  1. VHI: Vocal handcap index.